Relevant bibliographies by topics / Smart directional antenna

Academic literature on the topic 'Smart directional antenna'

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Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Smart directional antenna"

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Ng, Chee Kyun, Nor Kamariah Noordin, Sabira Khatun, Borhanuddin Mohd Ali, Sudhanshu Shekhar Jamuar, and Mahamod Ismail. "Directional Diversity of Smart Antenna in LAS CDMA Systems." Wireless Personal Communications 46, no. 3 (December 6, 2007): 305–16. http://dx.doi.org/10.1007/s11277-007-9435-4.

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Kim, Jae Hee, Dong-Jin Lee, Tae-Ki An, Jong-Gyu Hwang, and Chi-Hyung Ahn. "Multifunctional Partially Reflective Surface for Smart Blocks." Sensors 21, no. 19 (September 29, 2021): 6508. http://dx.doi.org/10.3390/s21196508.

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In general, a partially reflective surface (PRS) is mainly used to increase the gain of an antenna; some metallic objects placed on the PRS degrades the antenna performance because the objects change the periodic structure of the PRS. Herein, we propose a multifunctional PRS for smart block application. When a passenger passes over a smart block, the fare can be simultaneously collected and presented through the LED display. This requires high gain antenna with LED structure. The high gain characteristic helps the antenna identify passengers only when they pass over the block. The multifunctional PRS has a structure in which an LED can be placed in the horizontal direction while increasing the antenna gain. We used the antenna’s polarization characteristics to prevent performance deterioration when LED lines are placed in the PRS. We built the proposed antenna and measured its performance: At 2.41 GHz, the efficiency was 81.4%, and the antenna gain was 18.3 dBi. Furthermore, the half-power beamwidth was 18°, confirming a directional radiation pattern.
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Jusoh, M., M. F. Jamlos, M. R. Kamarudin, and T. Sabapathy. "A Reconfigurable WiMAX Antenna for Directional and Broadside Application." International Journal of Antennas and Propagation 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/405943.

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A novel reconfigurable compact patch array antenna for directional and broadside application is proposed. The presented antenna has successfully been able to function for directional beam at 320° or 35° and divisive broadside beam at 43° and 330°. This is realized in the unique form of aperture coupled spiral feeding technique and positioning of the radiating elements at 0°, 90,° and 180°. The switchable feature is effectively performed by the configuration of three PIN diodes. All PIN diodes are positioned at the specific location of the aperture coupled structure. It is discovered in simulation that the switches can be represented with a copper strip line or touchstone (TS) block . The proposed antenna design operates at 2.37 GHz to 2.41 GHz and has a maximum gain of 6.4 dB and efficiency of 85.97%. Such antenna produces a broadside HPBW with a wider bandwidth covering from −90° to 90° compared to the normal microstrip antenna which could only provide HPBW of −50° to 50°. Moreover, the proposed antenna has small physical dimension of 100 mm by 100 mm. The simulation and measurement results have successfully exhibited the idea of the presented antenna performance. Therefore, the antenna is sufficiently competent in the smart WiMAX antenna application.
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Wagih, Mahmoud, Alex S. Weddell, and Steve Beeby. "Overcoming the Efficiency Barrier of Textile Antennas: A Transmission Lines Approach." Proceedings 32, no. 1 (December 11, 2019): 18. http://dx.doi.org/10.3390/proceedings2019032018.

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Designing high-efficiency antennas on textiles is fundamental for the development of wirelessly-connected smart garments. Furthermore, large antenna arrays could be used to receive or harvest directional and ambient radio-frequency (RF) power from the environment, thus enabling battery-free e-textiles. The key challenges that are hindering the realisation of high efficiency antennas lie in the dielectric properties of fabrics, the conductivity of their traces, and their low textile thickness. This work numerically and experimentally analyses different RF transmission line structures to establish the limitations of widely utilised antenna designs, such as the microstrip patch, and proposes alternative wearable antenna design based on coplanar waveguide (CPW) structures. It is demonstrated that by using a CPW, insertion losses in a 20 mm line can be minimized by up to 40% for the same substrate, as compared to a microstrip, at 30 GHz. A CPW monopole antenna is demonstrated with more than 80% efficiency on a lossy, thin, poly-cotton substrate. Moreover, it is shown that the efficiency of the CPW monopole is independent of the substrate’s thickness and type of fabric.
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Yue, Zhou. "Design of Wireless Intelligent Electronics Card Four-Element Rectangular Micro-Strip Antenna Array." Advanced Materials Research 503-504 (April 2012): 1203–7. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1203.

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Wake-up signal reception sensitivity and the antenna has a close relationship, from the parking lot of the practical needs of communication, as well as the works of Wireless Intelligent Electronics Card System structure requirements, using a quarter-wavelength design four rectangular micro-strip antenna array modules. Wireless intelligent electronic card to participate in the car parks are long-distance communication systems RFID identification system, four modules of rectangular micro-strip antenna array to send wake-up signal is highly directional, and four units of rectangular micro-strip antenna array to send the signal electron can wake up the wireless smart card job, and avoid the region other than the wireless smart card electronic interference.
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Panagiotou, Stylianos C., Stelios C. A. Thomopoulos, and Christos N. Capsalis. "Genetic Algorithms in Antennas and Smart Antennas Design Overview: Two Novel Antenna Systems for Triband GNSS Applications and a Circular Switched Parasitic Array for WiMax Applications Developments with the Use of Genetic Algorithms." International Journal of Antennas and Propagation 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/729208.

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Genetic algorithms belong to a stochastic class of evolutionary techniques, whose robustness and global search of the solutions space have made them extremely popular among researchers. They have been successfully applied to electromagnetic optimization, including antenna design as well as smart antennas design. In this paper, extensive reference to literature related antenna design efforts employing genetic algorithms is taking place and subsequently, three novel antenna systems are designed in order to provide realistic implementations of a genetic algorithm. Two novel antenna systems are presented to cover the new GPS/Galileo band, namely, L5 (1176 MHz), together with the L1 GPS/Galileo and L2 GPS bands (1575 and 1227 MHz). The first system is a modified PIFA and the second one is a helical antenna above a ground plane. Both systems exhibit enhanced performance characteristics, such as sufficient front gain, input impedance matching, and increased front-to-back ratio. The last antenna system is a five-element switched parasitic array with a directional beam with sufficient beamwidth to a predetermined direction and an adequate impedance bandwidth which can be used as receiver for WiMax signals.
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Song, Bok-Sob, Hyeon-Cheol Lee, and Seung-Bum Kim. "Mount Location Simulation of UHF-Band Omni-Directional Antenna for Smart UAV." Journal of Korea Information and Communications Society 38C, no. 11 (November 30, 2013): 982–89. http://dx.doi.org/10.7840/kics.2013.38c.11.982.

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Shi, Chun, Xian Hua Dai, Shu Qian He, Zheng Jie Deng, and Ping Yuan Liang. "Packet Scheduling Algorithm in MAC of Smart Antenna System." Applied Mechanics and Materials 263-266 (December 2012): 1076–80. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.1076.

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Head of Line (HOL) blocking and deaf node problem are the main challenges in the smart antenna system in wireless ad hoc networks. To resolve these difficulties, we propose a novel packet scheduling algorithm based on the Directional Network Allocation Vector (DNAV). In the new algorithm, we divide the surrounding space of a tagged node into interference regions and free regions, and then transmit packets selected in turn from the data queue if there is an appropriately free region. The proposed algorithm can eliminate the deaf node problem and resolve the HOL blocking efficiently. Higher throughput and lower network delay are obtained by adapting to the dynamic network topology than other methods. The simulation results confirm the validity of the proposed algorithm.
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Maneiro-Catoira, Roberto, Julio Brégains, José A. García-Naya, and Luis Castedo. "Dual-Beam Steerable TMAs Combining AM and PM Switched Time-Modulation." Sensors 22, no. 4 (February 11, 2022): 1399. http://dx.doi.org/10.3390/s22041399.

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Wireless sensor networks (WSN) are increasingly requiring directional antennas that not only provide higher capacity, security, transmission range or robustness against interference, but also contribute with smart antenna capabilities such as adaptive beamforming or multi beam radiation patterns. Standard phased arrays provide these features, but employing feeding networks based on digitally controlled variable phase shifters (VPSs) which have the disadvantage of high cost and limited angular resolution. Instead, time-modulated arrays (TMAs) use switched feeding networks governed by digital periodic sequences which allow harmonic patterns to be radiated and endows (TMAs) with attractive multifunctional capabilities. In this paper, we analyze and properly combine (TMA) switched feeding networks capable of time-modulating an antenna array with discretized amplitude modulation (AM) and phase modulation (PM) waveforms. The advantages of the proposed innovative dual-beam (TMA) with respect to the competing architectures are, on the one hand, its power efficiency and beamsteering (BS) phase sensitivity and, on the other, its hardware simplicity, which allows for an excellent relative cost advantage.
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Zhou, Wenying, and Mai Lu. "Miniaturization of Quasi-Yagi Antenna Array with High Gain Using Split-Ring Resonators." International Journal of Antennas and Propagation 2020 (May 22, 2020): 1–12. http://dx.doi.org/10.1155/2020/4915848.

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In order to realize the miniaturization of quasi-Yagi antenna array, an antenna array with split-ring resonators (SRRs) based on two 7 units quasi-Yagi elements is designed in this paper. The radiation performance of the quasi-Yagi antenna array degrades significantly when array element spacing is reduced. After embedding SRRs on both sides of the miniaturized dielectric substrate surface, the S parameters and gain of array are significantly better than the array without SRRs, and the adjustable wave beam energy is also enhanced effectively. It indicates that the proposed antenna array with SRRs has good directional radiation performance under the miniaturize process at the operation frequency of 2.45 GHz, which could be widely applied in the fields of smart rail transportation and wireless power transfer.
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Dissertations / Theses on the topic "Smart directional antenna"

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Dham, Vikram. "Link Establishment in Ad Hoc Networks Using Smart Antennas." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/32310.

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Traditionally medium access control protocols for ad hoc networks have been designed for nodes using omni directional antennas. Through the use of directional antennas, it is possible to obtain higher efficiency. In this thesis we investigate the impact of these antennas on aggregate throughput and end-to-end delay. The use of omni-directional antennas not only results in lower power efficiency, but also decreases network efficiency due to interference caused by the transmission of packets in undesired directions. This thesis explores the effect of using smart antennas and proposes a signaling mechanism for forming the extended links using the network layer. For the performance assessment of the wireless networks using directional antennas, baseline models of phased array antenna and channel have been developed using the discrete event simulator OPNET ModelerTM 8.0. Simulation scenarios have been created for single hop as well as multihop networks. From the results of the simulation we observe that although the nodes forming the extended link experience decrease in end-to-end delay, the data successfully transmitted using extended link is correlated to the spatial distribution of nodes.
Master of Science
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Sun, Zhaohui, and n/a. "Improving Security in WLAN With the Use of Smart Antennas." Griffith University. School of Engineering, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070115.143811.

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Wireless communication systems are increasingly deployed by family, businesses, government and SOHO users because of the freedom wireless communications afford, simplicity of installation and ease of use. Along with its rapid development, the security problem in wireless communication network has attracted more and more attention. It has been estimated that the IEEE 80.211 standard is susceptible to attacks both on data content and user authentication, such as eavesdropping, spoofing and Denial of Service. These attacks are due to the standard's inherent flaws and space signal sharing caused by the omni-directional antenna it usually uses. In recent years, few studies have been undertaken which examine the use of the smart directional antenna to mitigate the security risks in mobile wireless computing networks. One of the major reasons is the antenna size, as portability is a key requirement. Due to the dielectric-material embedding and FDTD optimal design technology, a smart antenna with controllable directionality can now achieve an overall volume reduction of 80%. This has promise for application in the wireless security realm. This thesis provides a conventional background in wireless computing networks and security theory. In addition, security level definition, program in Matlab™ and corresponding experimental results are provided. To show the effectiveness of improving security in WLAN with the use of a smart directional antenna, this thesis proposes a model for predicting electromagnetic environments using a directional transmission antenna based on the Finite Element method. To validate the numerical results, a new experimental method (using Network Stumbler software) to measure the signal strength in different locations is introduced. Results from experiments using the two methods are consistent. The latter method gives the users the possibility of using a laptop (with an appropriate wireless card, software and roguing around) to detect the real-time signal strength in different locations instead of using expensive measure apparatus. Such an advantage can be valuable for the efficient implementation of indoor wireless networks for security purposes. Finally, it contributes a security solution using DE-ESMB and DE-ESPAR smart antennas in WLAN. Through these simulated and experimental results, one can conclude that the security performance in WLAN can be greatly improved by using smart directional antenna. There are five chapters in this thesis: Chapter 1 introduces the wireless communication network. Information about architecture, topology and popular wireless standards is presented in this chapter. Chapter 2 investigates the security problem in IEEE 802.11 Standards. Recent improvements in security, and their limitations, are also included. This problem is investigated by performing laboratory experiments, including a real attack on 802.11 Standards and packet capture experiments using AiroPeek NX software. Chapter 3 describes the useful parameters of smart directional antennas, and then presents the security level definition in WLAN. Simple software in Matlab™ to determine the security level according to the beamwidth of the adopted antenna is also introduced. Chapter 4 is the important part of this thesis. Simulation results of signal strength in different locations using FEMLAB™ are presented, which are consistent with the follow-up experimental results carried out in a typical office area. This chapter also describes the final security solution using the newly-designed DE-ESMB and DE-ESPAR directional antennas. Chapter 5 is a summary of the thesis. It presents the conclusions and suggests area of future research for improving the security level using smart antennas in WLAN.
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Sun, Zhaohui. "Improving Security in WLAN With the Use of Smart Antennas." Thesis, Griffith University, 2006. http://hdl.handle.net/10072/366543.

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Wireless communication systems are increasingly deployed by family, businesses, government and SOHO users because of the freedom wireless communications afford, simplicity of installation and ease of use. Along with its rapid development, the security problem in wireless communication network has attracted more and more attention. It has been estimated that the IEEE 80.211 standard is susceptible to attacks both on data content and user authentication, such as eavesdropping, spoofing and Denial of Service. These attacks are due to the standard's inherent flaws and space signal sharing caused by the omni-directional antenna it usually uses. In recent years, few studies have been undertaken which examine the use of the smart directional antenna to mitigate the security risks in mobile wireless computing networks. One of the major reasons is the antenna size, as portability is a key requirement. Due to the dielectric-material embedding and FDTD optimal design technology, a smart antenna with controllable directionality can now achieve an overall volume reduction of 80%. This has promise for application in the wireless security realm. This thesis provides a conventional background in wireless computing networks and security theory. In addition, security level definition, program in Matlab™ and corresponding experimental results are provided. To show the effectiveness of improving security in WLAN with the use of a smart directional antenna, this thesis proposes a model for predicting electromagnetic environments using a directional transmission antenna based on the Finite Element method. To validate the numerical results, a new experimental method (using Network Stumbler software) to measure the signal strength in different locations is introduced. Results from experiments using the two methods are consistent. The latter method gives the users the possibility of using a laptop (with an appropriate wireless card, software and roguing around) to detect the real-time signal strength in different locations instead of using expensive measure apparatus. Such an advantage can be valuable for the efficient implementation of indoor wireless networks for security purposes. Finally, it contributes a security solution using DE-ESMB and DE-ESPAR smart antennas in WLAN. Through these simulated and experimental results, one can conclude that the security performance in WLAN can be greatly improved by using smart directional antenna. There are five chapters in this thesis: Chapter 1 introduces the wireless communication network. Information about architecture, topology and popular wireless standards is presented in this chapter. Chapter 2 investigates the security problem in IEEE 802.11 Standards. Recent improvements in security, and their limitations, are also included. This problem is investigated by performing laboratory experiments, including a real attack on 802.11 Standards and packet capture experiments using AiroPeek NX software. Chapter 3 describes the useful parameters of smart directional antennas, and then presents the security level definition in WLAN. Simple software in Matlab™ to determine the security level according to the beamwidth of the adopted antenna is also introduced. Chapter 4 is the important part of this thesis. Simulation results of signal strength in different locations using FEMLAB™ are presented, which are consistent with the follow-up experimental results carried out in a typical office area. This chapter also describes the final security solution using the newly-designed DE-ESMB and DE-ESPAR directional antennas. Chapter 5 is a summary of the thesis. It presents the conclusions and suggests area of future research for improving the security level using smart antennas in WLAN.
Thesis (Masters)
Master of Philosophy (MPhil)
School of Engineering
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Abusultan, Monther Younis. "Digital implementation of direction-of-arrival estimation techniques for smart antenna systems." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/abusultan/AbusultanM0510.pdf.

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Adaptive antenna arrays use multiple antenna elements to form directional patterns in order to improve the performance of wireless communication systems. The antenna arrays also have the ability to detect the direction of incoming signals. These two capabilities allow a smart antenna system to adaptively beamform to more efficiently communicate between nodes. The direction-of-arrival estimation is a crucial component of the smart antenna system that uses open-loop adaptive approach. Historically this estimation has been accomplished using a personal computer. Implementing the estimation in the digital domain has the potential to provide a low cost and light weight solution due to recent advances in digital integrated circuit fabrication processes. Furthermore, digital circuitry allows for more sophisticated estimation algorithms to be implemented using the computational power of modern digital devices. This thesis presents the design and prototyping of direction-of-arrival (DOA) estimation for a smart antenna system implemented on a reconfigurable digital hardware fabric. Two DOA estimation algorithms are implemented and the performance tradeoffs between a custom hardware approach and a microprocessor-based system are compared. The algorithms were implemented for a 5.8 GHz, 8-element circular antenna array and their functionality was verified using a testbed platform. The implementation and analysis presented in this work will aid system designers to understand the tradeoffs between implementing algorithms in custom hardware versus an embedded system and when a hybrid approach is more advantageous.
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Pan, Yaobin. "Impact of DOA (direction of arrival) : in 4G MIMO Systems." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-42158.

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RADHAKRISHNAN, RAJESH. "A STUDY OF THE RECEPTION OF CO-DIRECTIONAL USERS USING BEAMFORMING, SWITCHED BEAMS AND MULTIUSER DETECTION STATEGIES." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037812447.

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Khallaayoun, Ahmed. "High resolution direction of arrival estimation analysis and implementation in a smart antenna system." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/khallaayoun/KhallaayounA0510.pdf.

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The goal of this research is to equip the smart antenna system designed by the telecommunication group at the department of Electrical and Computer Engineering at Montana State University with high resolution direction of arrival estimation (DOA) capabilities; the DOA block should provide accurate estimates of emitters' DOAs while being computationally efficient. Intensive study on DOA estimation algorithms was carried out to pinpoint the most suitable algorithm for the application of interest, and the spectral methods were chosen for this study. The outcome of the study consisted of generating a novel algorithm, spatial selective MUSIC, which is comparable in accuracy to other high resolution algorithms but does not require the intensive computational burden that is typical of high resolution spectral methods. Spatial selective MUSIC is compared in terms of bias, resolution, robustness and computational efficiency against the most widely used DOA estimation algorithms, namely, Bartlett, Capon, MUSIC, and beamspace MUSIC. The design, troubleshooting, and implementation of the hardware needed to implement the DOA estimation in a real case scenario was achieved. Two design phases were necessary to implement the center piece of the hardware needed to achieve DOA estimation. The 5.8 GHz 8 channel receiver board along with a casing that egg crates the RF channels for channel-to-channel isolation was designed and built. A National Instrument data acquisition card was used to simultaneously sample all the 8 channels at 2.5 MSPS, the data was processed using the PC interface built in LabView. Phase calibration that accounts for the overall system magnitude and phase differences along with a novel calibration method to mitigate the effects of magnitude and phase variations along with mutual coupling was produced during this research and was imperative to achieving high resolution DOA estimation in the lab. The DOA estimation capabilities of the built system was tested within the overall smart antenna system and showed promising results. The overall performance enhancement that the DOA estimation block can provide cannot however be fully realized until the beamforming block is revised to provide accurate and deep null placing along with a narrower beam width. This cannot be achieved with the current system due to limitations in the number of the array elements used and the granularity in the phase shifters and attenuators used in the analog beamformer.
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Do-Hong, Tuan [Verfasser]. "Wideband Direction-of-Arrival Estimation and Wideband Beamforming for Smart Antenna Systems / Tuan Do-Hong." Aachen : Shaker, 2004. http://d-nb.info/1170534392/34.

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Porsch, Marco. "Layer 2 Path Selection Protocol for Wireless Mesh Networks with Smart Antennas." Master's thesis, Universitätsbibliothek Chemnitz, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-74743.

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In this thesis the possibilities of smart antenna systems in wireless mesh networks are examined. With respect to the individual smart antenna tradeoffs, a routing protocol (Modified HWMP, MHWMP) for IEEE 802.11s mesh networks is presented, that exploits the full range of benefits provided by smart antennas: MHWMP actively switches between the PHY-layer transmission/reception modes (multiplexing, beamforming and diversity) according to the wireless channel conditions. Spatial multiplexing and beamforming are used for unicast data transmissions, while antenna diversity is employed for efficient broadcasts. To adapt to the directional channel environment and to take full benefit of the PHY capabilities, a respective MAC scheme is employed. The presented protocol is tested in extensive simulation and the results are examined.
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Mahajan, Rahul. "Cross-Layer Optimization: System Design and Simulation Methodologies." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35920.

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An important aspect of wireless networks is their dynamic behavior. The conventional protocol stack is inflexible as various protocol layers communicate in a strict manner. In such a case the layers are designed to operate under the worst conditions as opposed to adapting to changing conditions. This leads to inefficient use of spectrum and energy. Adaptation represents the ability of network protocols and applications to observe and respond to channel conditions. Traditional simulation methodologies independently model the physical and higher layers. When multiple layer simulations are required, an abstraction of one layer is inserted into the other to provide the multiple layer simulation. However, recent advances in wireless communication technologies, such as adaptive modulation and adaptive antenna algorithms, demand a cross layer perspective to this problem in order to provide a sufficient level of fidelity. However, a full simulation of both layers often results in excessively burdensome simulation run-times. The benefits and possible parametric characterization issues arising due to the cross-layer integration of lower physical and higher network layers are investigated in this thesis. The primary objective of investigating cross-layer simulation techniques is to increase the fidelity of cross-layer network simulations while minimizing the simulation runtime penalties. As a study of cross-layer system design a medium access control (MAC) scheme is studied for a MANET wherein the nodes are equipped with smart antennas. Traditional MAC protocols assume the use of omnidirectional antennas. Nodes with directional antennas are capable of transmitting in certain directions only and significantly reduce the chances of collision and increase the effective network capacity. MANETs using omni-directional antennas severely limit system performance as the entire space around a node up to its radio range is seen as a single logical channel. In this research a MAC protocol is studied that exploits space division multiple access at the physical layer. This is a strong example where physical and MAC design must be carried out simultaneously for adequate system performance. Power control is a very important in the design of cellular CDMA systems which suffer from the near-far problem. Finally, the interaction between successive interference cancellation (SIC) receivers at the physical layer and power control, which is a layer 2 radio resource management issue, is studied. Traffic for future wireless networks is expected to be a mix of real-time traffic such as voice, multimedia teleconferencing, and games and data traffic such as web browsing, messaging, etc. All these applications will require very diverse quality of service guarantees. A power control algorithm is studied, which drives the average received powers to those required, based on the QoS requirements of the individual users for a cellular CDMA system using SIC receivers.
Master of Science
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Book chapters on the topic "Smart directional antenna"

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Zhong, Cheng, Jin Li, Bin Ding, and Shaoyong Guo. "Investigation of Directional Wide-Beam Radial Line Slot Antenna for Smart Grid Fault Detector." In Proceedings of the 11th International Conference on Computer Engineering and Networks, 1463–70. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-6554-7_161.

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Tan, Moh Chuan, Minghui Li, Qammer H. Abbasi, and Muhammad Ali Imran. "Designing the Smart Antenna System." In Antenna Design Challenges and Future Directions for Modern Transportation Market, 31–41. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61581-9_4.

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Parveen, Sushil Kumar, and Rishipal Singh. "GPS-Free Localization in Vehicular Networks Using Directional Antennas." In Data Engineering for Smart Systems, 173–82. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2641-8_16.

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Lie, Joni Polili, Boon Poh Ng, Chong Meng Samson See, and Chin-Heng Lim. "Direction-of-Arrival (DOA) Estimation of Impulse Radio UWB RFID Tags." In Handbook of Smart Antennas for RFID Systems, 363–83. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470872178.ch14.

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Maddio, Stefano, Alessandro Cidronali, and Gianfranco Manes. "Smart Antennas for Direction-of-Arrival Indoor Positioning Applications." In Handbook of Position Location, 319–55. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118104750.ch10.

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Sun, Chen, Hiroshi Harada, and Nemai Chandra Karmakar. "Direction of Arrival Estimation Based on a Single-Port Smart Antenna for RFID Applications." In Handbook of Smart Antennas for RFID Systems, 317–40. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470872178.ch12.

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Zhang, Yimin, Xin Li, and Moeness G. Amin. "Mobile Ad Hoc Networks Exploiting Multi-Beam Antennas." In Handbook on Advancements in Smart Antenna Technologies for Wireless Networks, 398–424. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-988-5.ch019.

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This chapter introduces the concept of multi-beam antenna (MBA) in mobile ad hoc networks and the recent advances in the research relevant to this topic. MBAs have been proposed to achieve concurrent communications with multiple neighboring nodes while they inherit the advantages of directional antennas, such as the high directivity and antenna gain. MBAs can be implemented in the forms of multiple fixed-beam directional antennas (MFBAs) and multi-channel smart antennas (MCSAs). The former either uses multiple predefined beams or selects multiple directional antennas and thus is relatively simple; the latter uses smart antenna techniques to dynamically form multiple adaptive beams and thereby provides more robust communication links to the neighboring nodes. The emphases of this chapter lie in the offerings and implementation techniques of MBAs, random-access scheduling for the contention resolution, effect of multipath propagation, and node throughput evaluation.
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Watanabe, Masahiro, Sadao Obana, and Takashi Watanabe. "Ad Hoc Networks Testbed Using a Practice Smart Antenna with IEEE802.15.4 Wireless Modules." In Handbook on Advancements in Smart Antenna Technologies for Wireless Networks, 500–512. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-988-5.ch023.

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Recent studies on directional media access protocols (MACs) using smart antennas for wireless ad hoc networks have shown that directional MACs outperform against traditional omini-directional MACs. Those studies evaluate the performance mainly on simulations, where antenna beam is assumed to be ideal, i.e., with neither side-lobes nor back-lobes. Propagation conditions are also assumed to be mathematical model without realistic fading. In this paper, we develop at first a testbed for directional MAC protocols which enables to investigate performance of MAC protocols in the real environment. It incorporates ESPAR as a practical smart antenna, IEEE802.15.4/ZigBee, GPS and gyro modules to allow easy installment of different MAC protocols. To our knowledge, it is the first compact testbed with a practical smart antenna for directional MACs. We implement a directional MAC protocol called SWAMP to evaluate it in the real environment. The empirical discussion based on the experimental results shows that the degradation of the protocol with ideal antennas, and that the protocol still achieves the SDMA effect of spatial reuse and the effect of communication range extension.
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Watanabe, Masahiro, Sadao Obana, and Takashi Watanabe. "Ad Hoc Networks Testbed Using a Practice Smart Antenna with IEEE802.15.4 Wireless Modules." In Networking and Telecommunications, 1581–94. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-986-1.ch102.

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Abstract:
Recent studies on directional media access protocols (MACs) using smart antennas for wireless ad hoc networks have shown that directional MACs outperform against traditional omini-directional MACs. Those studies evaluate the performance mainly on simulations, where antenna beam is assumed to be ideal, i.e., with neither side-lobes nor back-lobes. Propagation conditions are also assumed to be mathematical model without realistic fading. In this paper, we develop at first a testbed for directional MAC protocols which enables to investigate performance of MAC protocols in the real environment. It incorporates ESPAR as a practical smart antenna, IEEE802.15.4/ZigBee, GPS and gyro modules to allow easy installment of different MAC protocols. To our knowledge, it is the first compact testbed with a practical smart antenna for directional MACs. We implement a directional MAC protocol called SWAMP to evaluate it in the real environment. The empirical discussion based on the experimental results shows that the degradation of the protocol with ideal antennas, and that the protocol still achieves the SDMA effect of spatial reuse and the effect of communication range extension.
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Hashimoto, Toru, and Tomoyuki Aono. "Key Generation System Using Smart Antenna." In Handbook on Advancements in Smart Antenna Technologies for Wireless Networks, 425–48. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-988-5.ch020.

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The technology of generating and sharing the key as the representative application of smart antennas is introduced. This scheme is based on the reciprocity theorem of radio wave propagation between the two communication parties. The random and intentional change of antenna directivity that is electrically changed by using such an ESPAR antenna as variable directional antenna is more effective for this scheme, because the propagation environment can be undulated intentionally and the reproducibility of the propagation environment can be decreased. In this chapter, experimental results carried out at many environments are described. From these results, this system has a potential to achieve the “unconditional security.”
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Conference papers on the topic "Smart directional antenna"

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Lehne, P. H., O. Rostbakken, and M. Pettersen. "Estimating smart antenna performance from directional radio channel measurements." In Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324). IEEE, 1999. http://dx.doi.org/10.1109/vetecf.1999.797040.

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Hou, Xuebin, Clive Parini, and Stuart Gregson. "Planar near-field measurement on an omni-directional UWB antenna." In 2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications. IEEE, 2007. http://dx.doi.org/10.1109/iwat.2007.370154.

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Kumar, D. Sathish, B. Elizabeth Caroline, K. Sagadevan, G. Sakthiganesh, and R. Saravanan. "Investigation of High Directional Gain Pentagonal Shaped Patch Antenna." In 2020 7th International Conference on Smart Structures and Systems (ICSSS). IEEE, 2020. http://dx.doi.org/10.1109/icsss49621.2020.9202223.

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Bo Han, Rasmus Nielsen, Constantinos Papadias, and Ramjee Prasad. "Directional transmission by 3-D beam-forming using smart antenna arrays." In 2013 3rd International Conference on Wireless Communications, Vehicular Technology, Information Theory and Aerospace & Electronic Systems (VITAE). IEEE, 2013. http://dx.doi.org/10.1109/vitae.2013.6617052.

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Tan, Fuwen, Duolong Wu, Bei Huang, and Jianfeng Li. "A directional conformal antenna array for failure detectors in smart grid applications." In 2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2017. http://dx.doi.org/10.1109/apcap.2017.8420638.

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Celik, Nuri, Magdy F. Iskander, R. Emrick, and Zhijun Zhang. "Experimental evaluation of the Hybrid Smart Antenna system with directional array elements." In 2009 IEEE Antennas and Propagation Society International Symposium (APSURSI). IEEE, 2009. http://dx.doi.org/10.1109/aps.2009.5171468.

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Zhang, Zhongwei, Jinxing Zhang, Lihui Wu, and Haoju Song. "An Improved Approach for RFID Network Planning: Introduction of Directional Antenna Reader." In 2019 IEEE International Conference on Smart Manufacturing, Industrial & Logistics Engineering (SMILE). IEEE, 2019. http://dx.doi.org/10.1109/smile45626.2019.8965313.

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Zhaohui Sun and Junwei Lu. "Improving the security performance in mobile wireless computing network using smart directional antenna." In Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. IEEE, 2003. http://dx.doi.org/10.1109/ceem.2003.238532.

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Vu Duc Tiep and Truong Vu Bang Giang. "Design of a dual-band omni-directional microstrip antenna for smart mobile phones." In 2012 International Conference on Advanced Technologies for Communications (ATC 2012). IEEE, 2012. http://dx.doi.org/10.1109/atc.2012.6404258.

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Hanaoui, Mohamed, and Mounir Rifi. "Directional communications with smart antenna system to improve energy efficiency in wireless sensor networks." In 2016 International Conference on Electrical and Information Technologies (ICEIT). IEEE, 2016. http://dx.doi.org/10.1109/eitech.2016.7519590.

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