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Academic literature on the topic 'Beamforming'

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Published: 4 June 2021
Last updated: 20 July 2024

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Journal articles on the topic "Beamforming"

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Bhat, Irfan Nissar, and Er Harish Dogra. "Beamforming for 5G Networks." International Journal of Trend in Scientific Research and Development Volume-2, Issue-6 (October 31, 2018): 39–42. http://dx.doi.org/10.31142/ijtsrd18405.

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Innok, Apinya, Peerapong Uthansakul, and Monthippa Uthansakul. "Angular Beamforming Technique for MIMO Beamforming System." International Journal of Antennas and Propagation 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/638150.

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The method of MIMO beamforming has gained a lot of attention. The eigen beamforming (EB) technique provides the best performance but requiring full channel information. However, it is impossible to fully acquire the channel in a real fading environment. To overcome the limitations of the EB technique, the quantized beamforming (QB) technique was proposed by using only some feedback bits instead of full channel information to calculate the suitable beamforming vectors. Unfortunalely, the complexity of finding the beamforming vectors is the limitation of the QB technique. In this paper, we propose a new technique named as angular beamforming (AB) to overcome drawbacks of QB technique. The proposed technique offers low computational complexity for finding the suitable beamforming vectors. In this paper, we also present the feasibility implementation of the proposed AB method. The experiments are undertaken mainly to verify the concept of the AB technique by utilizing the Butler matrix as a two-bit AB processor. The experimental implementation and the results demonstrate that the proposed technique is attractive from the point of view of easy implementation without much computational complexity and low cost.
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krishna, Mr P. V. Murali, and Lade Surendra Babu. "HYBRID BEAMFORMING FOR MULTIBEAM PHASED ARRAY RECEVIERS." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 12 (December 30, 2023): 1–3. http://dx.doi.org/10.55041/ijsrem27817.

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In the search for enhanced wireless communication systems, multibeam phased array receivers have gained prominence. They promise to significantly boost data rates, reduce latency, and improve reliability. However, implementing multibeam receivers with traditional beamforming techniques can be challenging due to the high computational demands and the need for multiple radio frequency (RF) chains. Hybrid beamforming combines the advantages of digital and analog beamforming to strike a balance between performance and complexity. Our research delves into the following aspects of Hybrid beamforming for multibeam phased array receivers: Reduced Hardware Complexity: By blending digital and analog beamforming, we reduce the number of required RF chains, making multibeam receivers more cost-effective. Enhanced Beam Steering: Hybrid beamforming maintains precise control over multiple beams, ensuring efficient signal reception and transmission. Real-World Applications: We discuss practical applications in 5G and beyond, satellite communications, and radar systems. The paper delves into the fundamental concepts of analog and digital beamforming, illustrating their respective strengths and limitations. It then presents the architecture of hybrid beamforming systems, emphasizing the synergistic integration of analog and digital components. Special attention is given to the design considerations of beamforming networks, antenna arrays, and the beam steering mechanism. KEYWORDS Hybrid Beamforming , Phased Array , Multi-Beam , Analog Beamforming , Digital Beamforming , Beamforming Networks , Antenna Array , Beam Steering , Spatial Multiplexing , Precoding , Channel Estimation , Interference Mitigation , Power Consumption , Millimeter Wave (mmWave) , 5G and Beyond .
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Zheng, Senyao, Hui Zhao, Long Zhao, Jie Mei, and Weimin Tang. "Multiuser Beamforming with Limited Feedback for FDD Massive MIMO Systems." Chinese Journal of Engineering 2016 (March 7, 2016): 1–9. http://dx.doi.org/10.1155/2016/9821845.

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This paper discusses the multiuser beamforming in FDD massive MIMO systems. It first introduces the feature of FDD massive MIMO systems to implement multiuser beamforming schemes. After that, considering the realistic implementation of multiuser beamforming scheme in FDD massive MIMO systems, it introduces the knowledge of channel quantization. In the main part of the paper, we introduce two traditional multiuser beamforming schemes and analyse their merits and demerits. Based on these, we propose a novel multiuser beamforming scheme to flexibly combine the merits of the traditional beamforming schemes. In the final part of the paper, we give some simulation results to compare the beamforming schemes mentioned in the paper. These simulation results show the superiority of the proposed beamforming scheme.
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Puhle, Christof. "Demonstration of a unified approach to beamforming." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (August 1, 2021): 4450–58. http://dx.doi.org/10.3397/in-2021-2709.

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In this paper, we discuss a unification of several well-known frequency domain beamforming methods into one working principle. The methods under consideration include Functional Beamforming, Asymptotic Beamforming, Adaptive Beamforming and - as a natural limiting case - Standard Beamforming. Common to most of these methods is the underlying eigenvalue decomposition of the cross-spectral matrix. Introducing a weighted power mean (also called weighted Hölder mean) in terms of these eigenvalues for every map point, each of the above methods is represented by a certain power p. Because of the latter, this unified approach will be called Power Beamforming throughout this paper. Going from the limiting case p=1 of Standard Beamforming to lower power values results in the attenuation of side lobes and sharpening of the main lobes in the corresponding beamforming map. We demonstrate this effect using simulations and several real-world measurements.
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Leng, Kaijing, and Leilei Deng. "Direction of arrival and target scale estimation based on split beamforming algorithm." Journal of Physics: Conference Series 2290, no. 1 (June 1, 2022): 012110. http://dx.doi.org/10.1088/1742-6596/2290/1/012110.

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Abstract Based on the theory of split beamforming algorithm and the experimental data collected by circular array, this paper analyzes the characteristics of DOA and target size estimation. In this paper, the signal receiving model of planar circular array and the split beamforming algorithm are studied. Then, based on the data collected from the lake experiment, the DOA estimation results of conventional beamforming algorithm, multiple signal classification algorithm and split beamforming algorithm are analyzed, and the target scale estimation results of split beamforming algorithm is analyzed. The experimental data analysis shows that the split beamforming algorithm has good direction finding stability, and the target scale estimation error based on the split beamforming algorithm is small.
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Hamid, Shahid, Shakti Raj Chopra, Akhil Gupta, Sudeep Tanwar, Bogdan Cristian Florea, Dragos Daniel Taralunga, Osama Alfarraj, and Ahmed M. Shehata. "Hybrid Beamforming in Massive MIMO for Next-Generation Communication Technology." Sensors 23, no. 16 (August 21, 2023): 7294. http://dx.doi.org/10.3390/s23167294.

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Hybrid beamforming is a viable method for lowering the complexity and expense of massive multiple-input multiple-output systems while achieving high data rates on track with digital beamforming. To this end, the purpose of the research reported in this paper is to assess the effectiveness of the three architectural beamforming techniques (Analog, Digital, and Hybrid beamforming) in massive multiple-input multiple-output systems, especially hybrid beamforming. In hybrid beamforming, the antennas are connected to a single radio frequency chain, unlike digital beamforming, where each antenna has a separate radio frequency chain. The beam formation toward a particular angle depends on the channel state information. Further, massive multiple-input multiple-output is discussed in detail along with the performance parameters like bit error rate, signal-to-noise ratio, achievable sum rate, power consumption in massive multiple-input multiple-output, and energy efficiency. Finally, a comparison has been established between the three beamforming techniques.
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Lan, Hualin, Xueqi Zhang, Ruonan Li, Suyu Jin, and Na Li. "Assessment of multi-target distinguishing using deconvolved conventional beamforming." MATEC Web of Conferences 283 (2019): 04005. http://dx.doi.org/10.1051/matecconf/201928304005.

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Multi-target distinguishing based on beamforming is a popular topic in array signal processing. Conventional beamforming as a frequently used method is robust but constrained by the Rayleigh limit. Deconvolved conventional beamforming is a better choice since point scattering function could be derived by deconvolution based on Lucy-Richardson, with narrower beam width and lower sidelobe levels. Besides, the robustness of the conventional beamforming is maintained. In this paper, a new method of combined deconvolved conventional beamforming with Dolph-Chebyshev weights is proposed. The proposed method could overcome the deficit of deconvolved conventional beamforming on low mainlobe of weak target caused by iteration. Firstly, principles of the method are given including conventional beamforming, deconvolved conventional beamforming and the proposed algorithm combined deconvolved conventional beamforming with Dolph-Chebyshev weights. Then, performance of the proposed method for bi-target signals with the equivalent strength, in terms of the effect of signal frequency on distinguishing performance of two closed spaced targets coexisted is analysed. For weak target detection existed strong interference, the superiority of the proposed algorithm is analysed. Finally, proposed method is validated with sea trial data of two ship target noise recorded by a 48-element array.
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Londhe, Gayatri D., and Vaibhav S. Hendre. "An Effective Kalman Based Hybrid Beamforming for Millimeter Wave Massive MIMO System by Using 2D Overlapped Partially Connected Sub-Array Structure." Traitement du Signal 39, no. 6 (December 31, 2022): 2141–47. http://dx.doi.org/10.18280/ts.390627.

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In 5G mobile communication networks, millimeter-wave (mmWave) technology plays a key role. To deal with the problem of path loss that happens in the mmWave band, competent beamforming employing a large antenna array is required. Fully digital beamforming approaches currently require separate radio frequency chains (RF chains) for each antenna, which adds to the computational complexity and hardware expense. In a multi-user environment, fully digital beamforming suffers from a larger antenna array layout, whereas analog beamforming solutions are prone to numerous performance concerns. Hybrid beamforming, on the other hand, offers a promising solution for multi-user mmWave communication. This work proposes a two-dimensional overlapping partially connected (2D-OPC) sub-array structure to reduce the antenna structure's hardware complexity and cost. The suggested technique comprises several sub-arrays that are overlapped in 2D space in the form of a Uniform Planar Array (UPA). The suggested scheme's performance is assessed using Kalman-based hybrid beamforming, which exhibits a considerable increase in spectral efficiency when compared to existing hybrid beamforming techniques. The suggested technique, which uses Kalman based hybrid beamforming and 2D-OPC provides 3.14% and 4.96% improvement over the MMSE hybrid beamforming and ZF pre-coding technique respectively.
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Zhang, Ding, Panneer Selvam Santhalingam, Parth Pathak, and Zizhan Zheng. "CoBF: Coordinated Beamforming in Dense mmWave Networks." ACM SIGMETRICS Performance Evaluation Review 51, no. 1 (June 26, 2023): 105–6. http://dx.doi.org/10.1145/3606376.3593531.

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With MIMO and enhanced beamforming features, IEEE 802.11ay is poised to create the next generation of mmWave WLANs that can provide over 100 Gbps data rate. However, beamforming between densely deployed APs and clients incurs unacceptable overhead. On the other hand, the absence of up-to-date beamforming information restricts the diversity gains available through MIMO and multi-users, reducing the overall network capacity. This paper presents a novel approach of "coordinated beamforming" (called CoBF) where only a small subset of APs are selected for beamforming in the 802.11ay mmWave WLANs. Based on the concept of uncertainty, CoBF predicts the APs whose beamforming information is likely outdated and needs updating. The proposed approach complements existing per-link beamforming solutions and extends their effectiveness from link-level to network-level. Furthermore, CoBF leverages the AP uncertainty to create MU-MIMO groups through interference-aware scheduling in 802.11ay WLANs. With extensive experimentation and simulations, we show that CoBF can significantly reduce beamforming overhead and improve network capacity for 802.11ay WLANs.
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Dissertations / Theses on the topic "Beamforming"

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Sullivan, Arthur, Christos Christodoulou, and Charles W. Chandler. "NEXT GENERATION DIGITAL BEAMFORMING ARRAY OPTIMIZED BY NEURAL NETWORK BEAMFORMING TECHNIQUES." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607379.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California
The next generation Digital Beamforming Array (DBFA) requires techniques beyond the existing adaptive processing and optimization approaches. By utilizing neural network processing and genetic algorithms that mimic complicated natural processes, such as the brain and natural selection, new and superior Antenna Arrays can be designed. The use of Neural Networks and Genetic Algorithms combined with the existing techniques for DBFAs can yield the ultimate in “real-time,” “smart” antenna performance. Cost is significantly reduced by; allowing large manufacturing tolerances, the use of inexpensive components, and correcting by neural network techniques. This paper describes the technology and proposes a practical application of the technique to design a DBFA to track and transmit/receive telemetry from a shipboard vertically launched medium range missile.
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Patil, Darshan. "Block Diagonalization Based Beamforming." Thesis, KTH, Teknisk informationsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-220403.

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With increasing mobile penetration multi-user multi-antenna wireless communication systems are needed. This is to ensure higher per-user data rates along with higher system capacities by exploiting the excess degree of freedom due to additional antennas at the receiver with spatial multiplexing. The rising popularity of "Gigabit-LTE" and "Massive-MIMO" or "FD-MIMO" is an illustration of this demand for high data rates, especially in the forward link. In this thesis we study the MU-MIMO communication setup and attempt to solve the problem of system sumrate maximization in the downlink data transmission (also known as forward link) under a limited availability of transmit power at the base station. Contrast to uplink, in the downlink, every user in the system is required to perform interference cancellation due to signals intended to other co-users. As the mobile terminals have strict restrictions on power availability and physical dimensions, processing capabilities are extremely narrow (relative to the base station). Therefore, we study the solutions from literature in which most of the interference cancellation can also be performed by the base station (precoding). While doing so we maximize the sumrate and also consider the restrictions on the total transmit power available at the base station. In this thesis, we also study and evaluate different conventional linear precoding schemes and how they relate to the optimal structure of the solution which maximize the effective Signal to Noise Ratio (SINR) at every receiver output. We also study one of the suboptimal precoding solutions known as Block-diagonalization (BD) applicable in the case where a receiver has multiple receive antennas and compare their performance. Finally, we notice that in spite of the promising results in terms of system sumrate performance, they are not deployed in practice. The reason for this is that classic BD schemes are computationally heavy. In this thesis we attempt to reduce the complexity of the BD schemes by exploiting the principle of coherence and using perturbation theory. We make use of OFDM technology and efficient linear algebra methods to update the beamforming weights in a smart way rather than entirely computing them again such that the overall complexity of the BD technique is reduced by at least an order of magnitude. The results are simulated using the exponential correlation channel model and the LTE 3D spatial channel model which is standardized by 3GPP. The simulated environment consists of single cell MU-MIMO in a standardized urban macro environment with up to 100 transmit antennas at the BS and 2 receive antennas per user. We observe that with the increase in spatial correlations and in high SNR regions, BD outperforms other precoding schemes discussed in this thesis and the developed low complex BD precoding solution can be considered as an alternative in a more general framework with multiple antennas at the receiver.
För att klara det ökade mobilanvändandet krävs trådlösa kommunikationssystemmed multipla antenner. Detta, för att kunna garantera högre datatakt peranvändare och högre systemkapacitet, genom att utnyttja att extra antennerpå basstationen ger extra frihetsgrader som kan nyttjas för spatiell multiplexing.Den ökande populariteten hos “Gigabit-LTE”, “Massive-MIMO” och “FDMIMO”illustrerar detta behov av höga datatakter, framför allt i framåtlänken.I denna avhandling studerar vi MU-MIMO-kommunikation och försöker lösaproblemet att maximera summadatatakten i nedlänkskommunikation (ävenkallat framåtlänken), med begränsad tillgänglig sändeffekt hos basstationen.In nedlänken, till skillnad från upplänken, så måste varje användare hanterainterferens från signaler som är avsedda för andra mottagare. Eftersom mobilterminalerär begränsade i storlek och batteristyrka, så har de små möjligheteratt utföra sådan signalbehandling (jämfört med basstationen). Därför studerarvi lösningar från litteraturen där det mesta av interferensundertryckningenockså kan utföras vid basstationen (förkodning). Detta görs för att maximerasummadatatakten och även ta hänsyn till begränsningar i basstationens totalasändeffekt.I denna avhandling studerar vi även olika konventionella linjära förkodningsmetoderoch utvärderar hur de relaterar till den optimala strukturen hos lösningensom maximerar signal till brus-förhållandet (SINR) hos varje mottagare.Vi studerar även en suboptimal förkodningslösning kallad blockdiagonalisering(BD) som är användbar när en mottagare har multipla mottagarantenner, ochjämför dess prestanda.Slutligen noterar vi att dessa förkodningsmetoder inte har implementeratsi praktiska system, trots deras lovande prestanda. Anledningen är att klassiskaBD-metoder är beräkningskrävande. I denna avhandling försöker vi minskaberäkningskomplexiteten genom att utnyttja kanalens koherens och användaperturbationsteori. Vi utnyttjar OFDM-teknologi och effektiva metoder i linjäralgebra för att uppdatera förkodarna på ett intelligent sätt istället för att beräknadem på nytt, så att den totala komplexiteten för BD-tekniken reducerasåtminstone en storleksordning.Resultaten simuleras med både en kanalmodell baserad på exponentiell korrelationoch med den spatiella LTE 3D-kanalmodellen som är standardiseradav 3GPP. Simuleringsmiljön består av en ensam makrocell i en standardiseradstadsmiljö med MU-MIMO med upp till 100 sändantenner vid basstationenoch 2 mottagarantenner per användare. Vi observerar att BD utklassar övrigaförkodningsmetoder som diskuteras i avhandlingen när spatiella korrelationenökar och för höga SNR, och att den föreslagna lågkomplexa BD-förkodaren kanvara ett alternativ i ett mer generellt scenario med multipla antenner hos mottagarna.
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Tshangini, Mati. "Multicell robust downlink beamforming." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/multicell-robust-downlink-beamforming(fde2310c-98de-440c-ab32-6a4257489d8c).html.

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The growth in large number of users and data exchange in cellular networks, has led to an urgent improvement of the power efficiency in cellular networks. The capacity and coverage are of main concern due to the fast growing applications and demand in different areas of use. The scarcity of the traditional communications resources like time and spectrum and the safety limits on transmit power from the base stations antennas as well as the mobile terminals demand the use of new additional resources such as spatial dimensions and cooperation for the realisation of the future cellular networks. Different distributively overlaid wireless cellular network systems are being deployed to meet demand for high data rates. However, these distributively overlaid wireless cellular networks can cause higher inter-cell interference if the signals from the source antennas are not combined and coordinated. Therefore, the solution to eliminating interference is considered as the benchmark for reducing the power consumption in the network. This thesis aims to address these concerns by proposing different algorithm techniques based on beamforming for Multi-Cell Processing (MCP) addressed across multiple coordinating multi-antenna base stations. First, a distributed optimization problem in a standard semidefinite relaxation (SDR) is introduced that minimizes a combination of the sum-power, used by each base station (BS) to transmit data to its local users, and the worst-case of the resulting overall interference induced on the other users of the adjacent cells in the presence of imperfect channel state information (CSI). The aim is to ensure that the worst-cases of the signal-to-interference- plus-noise ratio (SINR) at each user remains above the required level. The feasibility solutions are achieved for certain sets of SINRs only due to relaxation of optimal beamforming. To avoid relaxation and achieve higher SINRS, a second-order cone programming (SOCP), is introduced which is solved efficiently and achieve higher SINRs. Not only for its power efficiency improvement, but, also SOCP algorithm reduces the complexity of the extra signalling overhead.
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Chou, Thomas Clayton. "Broadband frequency-independent beamforming." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11854.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
Includes bibliographical references (p. 103-105).
by Thomas Clayton Chou.
M.S.
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Van, Tonder Vereese. "Beamforming for radio astronomy." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96126.

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Thesis (MEng) -- Stellenbosch University, 2014.
ENGLISH ABSTRACT: Beamforming is a technique used to combine signals from an array of antennas to effectively synthesize a single aperture and beam. In the Radio Astronomy community the technique is used to obtain a desirable beam pattern as well as to electronically point the beam of an array. Next generation radio telescopes such as the Square Kilometre Array (SKA) surpass current technology and will extensively make use of beamforming techniques. Various factors determine the output of a beamformer; however, given an array with a fixed configuration only the weights applied to the incoming signals affect the synthesized aperture and beam. Furthermore, the incoming data must be processed in real-time, at a rate equal to the input-output rate of the processor. Both the weighting function and the real-time implementation of beamforming, are the primary subjects of this thesis. In this thesis various deterministic weighting functions are investigated. The algorithms are implemented in a matlab program, serving as a simulation tool for investigating the techniques. The program is verified by comparing the expected theoretical outcomes to the simulated output. For the program the following functionalities are included: a steering technique, spectral weighting, Dolph-Chebychev, and the Least Square Error algorithm. Applications of these techniques is investigated and their prominence in the Radio Astronomy community is established. For the real-time beamformer implementation, the UniBoard platform configured with beamformer firmware, is investigated. This is important as the UniBoard is an excellent example of a beamformer implementation within the Radio Astronomy community. The architecture is used to emulate a linear array by implementing a python control script, where the output corresponded accurately with the expected theoretical values. The thesis also constitutes the design and implementation of a digital frequency domain beamformer on the ROACH board. This processing board is employed by the Karoo Array Telescope (KAT-7) in South Africa. This work is therefore important as it demonstrates a beamformer implementation on an architecture in use by the Radio Astronomy community. An antenna array is designed and built for the verification of the beamformer design. Results with a good degree of accuracy were obtained and where errors exist they are discussed.
AFRIKKANSE OPSOMMING: Bundelvorming is ’n tegniek waarmee die seine van ’n antenna samestelling gekombineer word om ’n enkele effektiewe stralingsvlak en stralingspatroon te sintiseer. In die Radio Astronomie gemeenskap word die tegniek gebruik om ’n gewenste stralingspatroon te sintiseer sowel as om die rigting van die patroon elektronies te beheer. Die Square Kilometre Array (SKA) is ’n toekomstige radioteleskoop en sal grootliks gebruik maak van bundelvorming tegnieke. Die uitset van bundelvormers word geaffekteer deur verskeie faktore, maar vir ’n gegewe samestelling is dit net die gewigsfunksies wat toegepas word op die inkomende seine wat die gesintiseerde patroon kan beheer. Verder moet die inkomende data verwerk word teen ’n tempo gelykstaande aan die inset-en-uitsetkoers van die verwerker. Die gewigsfunksie so wel as die implementasie van die bundelvormer is albei primêre onderwerpe van die tesis. ’n Verskeindenheid van deterministiese bundelvormingstegnieke sal ondersoek word in hierdie tesis. Die algoritmes is in ’n matlab program geïmplementeer vir simulasie doeleindes. Die program is geverifieër deur die uitset te vergelyk met die verwagte teoretiese waardes. Die program sluit die volgende funksies in: ’n rigting beheer algoritme, spektraalgewigte, Dolph-Chebychev, en die minste vierkantsfout algoritme. Hierdie tegnieke is van belang weens hul toepassing in die Radio Astronomie gemeenskap. Vir die implementasie van ’n bundelvormer is die UniBoard hardeware, geprogrameer in ’n bundelvormings modus, van gebruik gemaak. Hierdie aspek is belangrik omdat die Uni- Board ’n goeie voorbeeld van ’n geïmplementeerde bundelvormer in die Radio Astronomie gemeenskap is. Die UniBoard word gebruik om ’n lineêre samestelling te emuleer deur in python ’n beheer skrip te skryf, waar die uitset van die emuleerder akkuraat ooreenstem met die verwagte waardes. Die tesis behels ook die ontwerp en implementasie van ’n digitale frekwensiegebied bundelvormer op die ROACH platform. Hierdie verwerker word tans gebruik in die Karoo Array Telescope (KAT-7) in Suid-Afrika. Hierdie werk is dus belangrik omdat dit die implementasie van ’n bundelvormer op tegnologie wat huidiglik in die Radio Astronomie gemeenskap gebruik word demonstreer. Daarbenewens is ’n antenna samestelling ontwerp en gebou om die bundelvormer te verifieër. Die resultate is akkuraat tot ’n redelike mate. Waar daar ’n fout onstaan het word dit in die tesis bespreek.
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Venkatasubramanian, Ramasamy. "Beamforming for MC-CDMA." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31287.

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Orthogonal Frequency Division Multiplexing (OFDM) has recently gained a lot of attention and is a potential candidate for Fourth Generation (4G) wireless systems because it promises data rates up to 10Mbps. A variation of OFDM is Multi-Carrier CDMA (MC-CDMA) which is an OFDM technique where the individual data symbols are spread using a spreading code in the frequency domain. The spreading code associated with MC-CDMA provides multiple access technique as well as interference suppression. Often times in cellular and military environments the desired signal can be buried below interference. In such conditions, the processing gain associated with the spreading cannot provide the needed interference suppression. This research work investigates multi-antenna receivers for OFDM and MC-CDMA systems; specifically this works investigates adaptive antenna algorithms for MC-CDMA for very different channel conditions. Frequency domain beamforming is studied in this research predominantly through simulation. As an alternative a time domain beamforming is also studied. Time variations in the channel can disrupt the orthogonality between subcarriers. Minimum Mean Square Error (MMSE) detection coupled with MMSE beamforming is proposed for time varying channels. Semi-analytic results are derived to study the Bit Error Rate (BER) performance. These results show significant performance improvement in the presence of interference. Joint MMSE weights in space and frequency is also investigated and semi-analytic results are derived to study their BER performance.
Master of Science
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Luo, Zhengwei. "Beamforming for binaural hearing aids." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28170.

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Binaural hearing aids making use of a wireless link are becoming a trend in hearing-aids design. However, it is still not clear how much gain can be obtained in complex real-life acoustic environments when using binaural hearing aids compared to monaural ones, and whether binaural hearing aids are worth the additional effort and complexity. This thesis aims to provide some answers to this question. In particular, it will compare the performance of different microphone array configurations, study the effects of using different head models for fixed beamforming design, assess the effect of head model mismatch and direction of arrival information mismatch, investigate methods to preserve the binaural cues, evaluate combinations of fixed binaural beamforming followed by other noise reduction algorithms, and assess the performance of the different algorithms using both classical beamforming metrics and objective measures related to speech quality and intelligibility.
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Jangam, Ravindra nath vijay kumar. "BEAMFORMING TECHNIQUES USING CONVEX OPTIMIZATION." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-33934.

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The thesis analyses and validates Beamforming methods using Convex Optimization.  CVX which is a Matlab supported tool for convex optimization has been used to develop this concept. An algorithm is designed by which an appropriate system has been identified by varying parameters such as number of antennas, passband width, and stopbands widths of a beamformer. We have observed the beamformer by minimizing the error for Least-square and Infinity norms. A graph obtained by the optimum values between least-square and infinity norms shows us a trade-off between these two norms. We have observed convex optimization for double passband of a beamformer which has proven the flexibility of convex optimization. On extension for this, we designed a filter in which stopband is arbitrary. A constraint is used by which the stopband would be varying depending upon the upper boundary (limiting) line which varies w.r.t y-axis (dB). The beamformer has been observed for feasibility by varying parameters such as number of antennas, arbitrary upper boundaries, stopbands and passband. This proves that there is flexibility for designing a beamformer as desired.
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Liu, Wei. "Digital beamforming employing subband techniques." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422950.

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Ahmad, Nurul Nadia. "Minimum bit error ratio beamforming." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418966.

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Books on the topic "Beamforming"

1

Li, Jian, and Petre Stoica, eds. Robust Adaptive Beamforming. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471733482.

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Li, Jian, and Petre Stoica, eds. Robust Adaptive Beamforming. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471733482.

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Benesty, Jacob, Jingdong Chen, and Chao Pan. Fundamentals of Differential Beamforming. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1046-0.

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Bazan, Osama, Baha Uddin Kazi, and Muhammad Jaseemuddin. Beamforming Antennas in Wireless Networks. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77459-2.

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Kwok-Yeung, Lo Titus, ed. Digital beamforming in wireless communications. Boston, Mass: Artech House, 1996.

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6

F, Boldissar, Chang D. C. D, and United States. National Aeronautics and Space Administration., eds. Antenna beamforming using optical processing. [Washington, DC: National Aeronautics and Space Administration, 1990.

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Liu, Wei. Wideband beamforming: Concepts and techniques. Chichester, West Sussex, U.K: Wiley, 2010.

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Mohammadzadeh Asl, Babak, and Roya Paridar. Beamforming in Medical Ultrasound Imaging. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-7528-0.

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Yu, Yikun, Peter G. M. Baltus, and Arthur H. M. van Roermund. Integrated 60GHz RF Beamforming in CMOS. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0662-0.

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Benesty, Jacob, Israel Cohen, and Jingdong Chen. Array Beamforming with Linear Difference Equations. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68273-6.

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Book chapters on the topic "Beamforming"

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Allen, Ben. "Beamforming." In Ultra-Wideband, 67–87. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470056843.ch5.

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Kuang, Linling, Chunxiao Jiang, Yi Qian, and Jianhua Lu. "Beamforming Transmission." In Wireless Networks, 7–30. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61768-8_2.

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Ochiai, Hideki, and Hideki Imai. "Collaborative Beamforming." In New Directions in Wireless Communications Research, 175–97. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0673-1_7.

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Ghavami, Mohammad, and Kaveh Heidary. "UWB Beamforming." In Ultra-Wideband, 241–58. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470056843.ch12.

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Benesty, Jacob, and Israel Cohen. "Adaptive Beamforming." In SpringerBriefs in Electrical and Computer Engineering, 103–17. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67020-1_7.

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Benesty, Jacob, Gongping Huang, Jingdong Chen, and Ningning Pan. "Differential Beamforming." In Microphone Arrays, 139–67. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-36974-2_7.

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Benesty, Jacob, Gongping Huang, Jingdong Chen, and Ningning Pan. "Binaural Beamforming." In Microphone Arrays, 183–204. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-36974-2_9.

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Benesty, Jacob, Gongping Huang, Jingdong Chen, and Ningning Pan. "Distortionless Beamforming." In Microphone Arrays, 113–38. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-36974-2_6.

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Li, Jian, Zhisong Wang, and Petre Stoica. "Robust Capon Beamforming." In Robust Adaptive Beamforming, 91–200. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471733482.ch3.

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van der Veen, Alle-Jan, and Amir Leshem. "Constant Modulus Beamforming." In Robust Adaptive Beamforming, 299–351. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471733482.ch6.

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Conference papers on the topic "Beamforming"

1

NAIDU, PS. "A NEW METHOD OF ACOUSTIC SOURCE LOCALIZATION IN SHALLOW SEA." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19250.

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SUTIN, A. "PARAMETRIC ACOUSTIC ARRAY IN THE OCEAN: EXPERIMENTS AND APPLICATIONS." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19233.

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MACEY, PC. "ANALYSIS OF LINEAR ARRAYS OF RING TRANSDUCERS USING WAVE ENVELOPE ELEMENTS." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19247.

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USCINSKI, BJ. "PERFORMANCE OF HORIZONTAL TOWED ARRAYS - EFFECT OF INTERNAL WAVES." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19234.

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HARRISON, CH, and A. COWLEY. "A MODEL OF NOISE RESPONSE FOR BAFFLED HYDROPHONE ARRAYS." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19235.

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DOBBINS, PF. "PORT/STARBOARD DISCRIMINATION WITH TOWED ARRAYS." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19248.

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BEEN, R. "APPLICATION OF A MAXIMUM LIKELIHOOD TYPE ESTIMATOR TO THE TOWED ARRAY SHAPE ESTIMATION PROBLEM." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19251.

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HARDIE, DJW, M. BLAKEMORE, and J. POWER. "THE INFLUENCE OF HULL VIBRATION ON ARRAY PERFORMANCE." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19237.

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MIKLOVIC, DW. "ACHIEVING HIGH BROADBAND PERFORMANCE WITH NARROWBAND SONAR ARRAYS." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19239.

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POWER, J. "TRANSDUCERS WITH CONTROLLED DIRECTIVITY AND THEIR USE IN REDUCING NOISE IN ARRAYS." In Arrays and Beamforming in Sonar 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19242.

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Reports on the topic "Beamforming"

1

Owsley, Norman L. Systolic Array Adaptive Beamforming. Fort Belvoir, VA: Defense Technical Information Center, September 1987. http://dx.doi.org/10.21236/ada187496.

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Lockwood, J. C. Active LFM Mixer Adaptive (ALMA) Beamforming. Fort Belvoir, VA: Defense Technical Information Center, February 1994. http://dx.doi.org/10.21236/ada278160.

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Sadovnik, Lev. Optically Controlled MMW Beamsteering Beamforming Antenna. Fort Belvoir, VA: Defense Technical Information Center, June 1994. http://dx.doi.org/10.21236/ada282831.

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Streit, R. L. Studies in Beamforming Tracking Neural Networks Mathematics. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada255574.

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Tran, C. V. Beamforming with a Limited Number of Snapshots. Fort Belvoir, VA: Defense Technical Information Center, October 1991. http://dx.doi.org/10.21236/ada244346.

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Russotti, Joseph S., Mark A. Creese, and Thomas P. Santoro. Advanced Binaural Sonar Display Using Spatial Vernier Beamforming. Fort Belvoir, VA: Defense Technical Information Center, July 2005. http://dx.doi.org/10.21236/ada436604.

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Krolik, Jeff. Wideband Beamforming for a Sparse Nonuniformly Spaced Array. Fort Belvoir, VA: Defense Technical Information Center, January 1994. http://dx.doi.org/10.21236/ada280833.

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Babbitt, W. R. Wide-Band Optical True-Time Delay and Adaptive Beamforming. Fort Belvoir, VA: Defense Technical Information Center, January 2001. http://dx.doi.org/10.21236/ada396778.

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Krolik, Jeffrey. Wideband Beamforming for a Sparse Nonuniform Spaced Sensor Array. Fort Belvoir, VA: Defense Technical Information Center, April 1993. http://dx.doi.org/10.21236/ada265909.

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Yao, Kung. Blind Beamforming for Collaborative Array Processing in Sensor Networks. Fort Belvoir, VA: Defense Technical Information Center, May 2004. http://dx.doi.org/10.21236/ada424487.

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