Gotowe bibliografie tematyczne / OFDM (Orthogonal Frequency Division Multiplexing)

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Gotowa bibliografia na temat „OFDM (Orthogonal Frequency Division Multiplexing)”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 27 kwietnia 2022

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Artykuły w czasopismach na temat "OFDM (Orthogonal Frequency Division Multiplexing)"

Uppal, Sabhyata, Sanjay Sharma i Hardeep Singh. "Analytical Investigation on Papr Reduction in OFDM Systems Using Golay Codes". Journal of Electrical Engineering 65, nr 5 (1.09.2014): 289–93. http://dx.doi.org/10.2478/jee-2014-0046.

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Abstract Orthogonal frequency division multiplexing (OFDM) is a common technique in multi carrier communications. One of the major issues in developing OFDM is the high peak to average power ratio (PAPR). Golay sequences have been introduced to construct 16-QAM and 256-QAM (quadrature amplitude modulation) code for the orthogonal frequency division multiplexing (OFDM), reducing the peak-to-average power ratio. In this paper we have considered the use of coding to reduce the peakto- average power ratio (PAPR) for orthogonal frequency division multiplexing (OFDM) systems. By using QPSK Golay sequences, 16 and 256 QAM sequences with low PAPR are generated

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Sun, Zeng You, i Fan Ming Zeng. "Optimization and Simulation of OFDM System Based on Orthogonal Wavelet". Applied Mechanics and Materials 548-549 (kwiecień 2014): 1221–26. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1221.

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In order to reduce the Orthogonal Frequency division Multiplexing (OFDM) Inter-Carrier Interference (ICI), Put forward a kind of modulation method that based on the orthogonal frequency division multiplexing of orthogonal wavelet, Using orthogonal wavelet instead of discrete Fourier transform, optimize the design for OFDM systems, on the premise of without protection interval to reduce the system interference, using MATLAB to simulate the OFDM system, results show that the optimization of the OFDM can reduce the power of the ICI and Inter-symbol Interference (ISI) and improve the comprehensive anti-jamming of the OFDM system.

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Yang, Xianzhen, Siyuan Yan, Xiao Li i Fu Li. "A Unified Spectrum Formulation for OFDM, FBMC, and F-OFDM". Electronics 9, nr 8 (11.08.2020): 1285. http://dx.doi.org/10.3390/electronics9081285.

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Although orthogonal frequency division multiplexing (OFDM) has been standardized for 5G, filter bank multi-carrier (FBMC) and filtered orthogonal frequency division multiplexing (F-OFDM) remain competitive as candidates for future generations of wireless technologies beyond 5G, due to their reduced spectrum leakage and thus enhanced spectrum efficiency. In this article, we developed a unified spectrum expression for OFDM, FBMC, and F-OFDM, which provides comparative insights into those techniques. A representative sideband quantification is included at the end of this article.

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Koti, Jayasudha, i Braj Kishore Mishra. "BER Performance Comparison of DCO-OFDM and Convolutional Coded DCO-OFDM in IM/DD Systems". International Journal of Electronics, Communications, and Measurement Engineering 8, nr 2 (lipiec 2019): 26–39. http://dx.doi.org/10.4018/ijecme.2019070102.

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Optical wireless communication (OWC) is an alternative technology to meet the demands of the exponentially-growing high data rate applications run by broadband users. The implementation of single carrier modulation techniques in OWC is an age old technology, but for the last few years research is focused towards the multicarrier modulation techniques in OWC. In OWC, information is carried using intensity modulation and retrieved using direct detection. To perform intensity modulation, the baseband signal should be a unipolar signal. To obtain a unipolar signal, various techniques such as DC-biased orthogonal frequency division multiplexing (DCO-OFDM), Asymmetrically clipped orthogonal frequency division multiplexing (ACO-OFDM), Flip orthogonal frequency division multiplexing (Flip-OFDM) and Unipolar orthogonal frequency division multiplexing (U-OFDM) techniques are reported in the literature. Though the DCO-OFDM is spectrally efficient compared to other techniques it requires more power to achieve the targeted BER. In this article, a convolutional Coded DCO-OFDM (CDCO-OFDM) has been introduced by applying channel coding. A convolutional encoder and a hard-decision Viterbi decoder are considered in CDCO-OFDM. It has been observed that CDCO-OFDM requires less transmitted power than DCO-OFDM to attain the targeted BER. The performance of DCO-OFDM and CDCO-OFDM is evaluated for 4, 16, 64 QAM- 7dB and 13dB bias, in the presence of the additive white Gaussian noise (AWGN) channel. It is observed that CDCO requires less power to transmit than DCO-OFDM for the BER 10-4.

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Sahrab, Ammar A., i Alaa Doohee Yaseen. "Filtered orthogonal frequency division multiplexing for improved 5G systems". Bulletin of Electrical Engineering and Informatics 10, nr 4 (1.08.2021): 2079–87. http://dx.doi.org/10.11591/eei.v10i4.3119.

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Wireless communications became an integrated part of the human life. Fifth generation (5G) is the modern communication which provides enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine type communication (mMTC). Thus, 5G have to provide coverage to multi-numerology devices, therefore, modulation and access schemes are suggested in the literature such as cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and filtered OFDM (f-OFDM). CP-OFDM suffers from the high out of band emission which limited the multi-numerology applications. In f-OFDM, the out of band emission can be suppressed to an accepted extent such that different numerologies can be coexisting. On the other hand, f-OFDM can be more improved by using a proper filtering approach. In this paper three different filters are suggested based windowed-sinc function; Hanning, Hamming, and Blackman. Simulation results show that the proposed filters are promising for high spectral efficiency and out of band emission rejection. Furthermore, the bit error rate, error vector magnitude, and power spectral density are further improved with respect to CP-OFDM scheme but some trade-off is present. Overall, the suggested windowed-sinc filters are outperforming the traditional CP-OFDM. As a conclusion, the suggested windnowed-sinc filters have no limitations on the modulation order or the number of subcarriers utilized in the system.

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Praveen Kumar Malik i M P Tripathi. "OFDM: A Mathematical Review". Journal on Today's Ideas - Tomorrow's Technologies 5, nr 2 (28.12.2017): 97–111. http://dx.doi.org/10.15415/jotitt.2017.52006.

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Mathematical review of the Orthogonal Frequency Division Multiplexing is demonstrated in terms of Inter symbol interference, Multi carrier modulated system and cyclic prefix. Modeling of the mathematical equation of the Orthogonal Frequency Division Multiplexing, Inverse fast Fourier transform and fast Fourier transform is explained with the suitable example using MATLAB. Bit error rate performance of OFDM is also presented with the help of statistical computation.

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Lowery, Arthur James. "Spectrally efficient optical orthogonal frequency division multiplexing". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, nr 2169 (2.03.2020): 20190180. http://dx.doi.org/10.1098/rsta.2019.0180.

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This paper charts the development of spectrally efficient forms of optical orthogonal frequency division multiplexing (OFDM) that are suited for intensity-modulated direct detection systems, such as wireless optical communications. The journey begins with systems using a DC-bias to ensure that no parts of the signal that modulates the optical source are negative in value, as negative optical intensity is unphysical. As the DC-part of the optical signal carries no information, it is wasteful in energy; thus asymmetrically clipped optical OFDM was developed, removing any negative-going peaks below the mean. Unfortunately, the clipping causes second-order distortion and intermodulation, so some subcarriers appear to be unusable, halving spectral efficiency; this is similar for unipolar and flipped optical OFDM. Thus, a considerable effort has been made to regain spectral efficiency, using layered techniques where the clipping distortion is mostly cancelled at the receiver, from a knowledge of one unpolluted layer, enabling one or more extra ‘layers/paths/depths’ to be received on the previously unusable subcarriers. Importantly, for a given optical power and high-order modulation, layered methods offer the best spectral efficiencies and need the lowest signal-to-noise ratios, especially if diversity combining is used. Thus, they could be important for high-bandwidth optical fibre systems. Efficient methods of generating all layers simultaneously, using fast Fourier transforms with their partial calculations extracted, are discussed, as are experimental demonstrations in both wireless and short-haul communications links. A musical analogy is also provided, which may point to how orchestral and rock music is deciphered in the brain. This article is part of the theme issue ‘Optical wireless communication’.

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Li, Chen Wu, Jian Zhang, Qin Xie i Xiao Hong Zhang. "Carrier Modulation Technology Based on Orthogonal Frequency Division Multiplexing". Advanced Materials Research 774-776 (wrzesień 2013): 1671–76. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1671.

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This paper first analyzes the transmission characteristics of low-voltage power line channels with the focus on the study of carrier modulation technology regarding the power line communication part, then proposes the orthogonal frequency division multiplexing technology that serves for the digital communication of family network power line communication gateways, analyzes the OFDM system principle, actulizes OFDM modulation and demodulation through discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT), and build the OFDM simulation model. Finally, a specific plan of using power lines as the family network transmission media is proposed.

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Girinath, N. "A Novel Reconfigurable Orthogonal Frequency Division Multiplexing Transceiver". Journal of Computational and Theoretical Nanoscience 16, nr 2 (1.02.2019): 430–35. http://dx.doi.org/10.1166/jctn.2019.7745.

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As the world moves toward 3G/4G there is a need for high data rate and relatively wide bandwidths. OFDM (Orthogonal Frequency Division Multiplexing) a form of multicarrier modulation technique is widely used to achieve high speed efficient data transmission at the rate of several Mbps. It is used in Wi-Fi standards like 802.11a, 802.11n, 802.11ac, broadcast standards like Digital Video Broadcast (DVB) and cellular telecommunications standard LTE. The main advantage of OFDM compared to single carrier modulation is their robustness to channel fading in wireless environment, high baud rates and less inter symbol interference. One major disadvantage is its High PAPR. PTS partial transmit sequences (PTS) and selective mapping are proposed to reduce it. Since FFT is core block of OFDM it must be able to adapt itself to ever changing digital world. A function specific reconfigurable 2k SDF (Single path delay feedback) FFT is proposed. It utilizes less power and can be configured for different FFT sizes ranging from 16-point to 1024-point. The validity and efficiency of the architecture have been verified by simulation in hardware description language VERILOG and targeted on Virtex-6 device. Finally PAPR is estimated by MATLAB simulation.

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Yonis, Aws Zuheer, i Khalid Khalil Mohammed. "Investigation of pattern division multiple access technique in wireless communication networks". Indonesian Journal of Electrical Engineering and Computer Science 26, nr 1 (1.04.2022): 296. http://dx.doi.org/10.11591/ijeecs.v26.i1.pp296-303.

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Recently, <span>pattern division multiple access (PDMA) is a non-orthogonal multiple access system that is now being developed in next-generation telecoms to address the requirement for mass connectivity. The core premise of non-orthogonal multiple access is to simultaneously serve multiple users with varying power levels across the same spectrum resources such as time, frequency, code, as well as space with minimal inter-user interference. A simulation analysis of significant technology enhancements focusing on PDMA aims to describe the benefits of the two plans now being examined by the third-generation partnership project for 5G technologies, namely filtered orthogonal frequency division multiplexing (F-OFDM) and windowed orthogonal frequency division multiplexing (W-OFDM), and to compare them to alternative modulation processes such as 16, 32, and 128 modulations. The research results explained the PDMA is less bit error rate used in multiple access technologies compare with W-OFDM and F-OFDM.</span>

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Rozprawy doktorskie na temat "OFDM (Orthogonal Frequency Division Multiplexing)"

Zhang, Hua. "Orthogonal Frequency Division Multiplexing for Wireless Communications". Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4960.

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OFDM is a promising technique for high-data-rate wireless communications because it can combat inter-symbol interference (ISI) caused by the dispersive fading of wireless channels. The proposed research focuses on techniques that improve the performance of OFDM-based wireless communications and its commercial and military applications. In particular, we address the following aspects of OFDM: inter-channel interference (ICI) suppression, interference suppression for clustered OFDM, clustered OFDM based anti-jamming modulation, channel estimation for MIMO-OFDM, MIMO transmission with limited feedback. For inter-channel interference suppression, a frequency domain partial response coding (PRC) scheme is proposed to mitigate ICI. We derive the near-optimal weights for PRC that is independent on the channel power spectrum. The error floor resulting from ICI can be reduced significantly using a two-tap or a three-tap PRC. Clustered OFDM is a new technique that has many advantages over traditional OFDM. In clustered OFDM systems, adaptive antenna arrays are used for interference suppression. To calculate weights for interference suppression, we propose a polynomial-based parameter estimator to combat the severe leakage of the DFT based estimator due to the small size of the cluster. An adaptive algorithm is developed to obtain optimal performance. For high data rate military communications, we propose a clustered OFDM base spread spectrum modulation to provide both anti-jamming and fading suppression capability. We analyze the performance of uncoded and coded system. Employing multiple transmit and receive antennas in OFDM systems (MIMO-OFDM) can increase the spectral efficiency and link reliability. We develop a minimum mean-square-error (MMSE) channel estimator that takes advantage of the spatial-frequency correlations in MIMO-OFDM systems to minimize the estimation error. We investigate the training sequence design and two optimal training sequence designs are given for arbitrary spatial correlations. For a MIMO system, the diversity and array gains can be obtained by exploiting channel information at the transmitter. For MIMO-OFDM systems, we propose a subspace tracking based approach that can exploit the frequency correlations of the OFDM system to reduce the feedback rate. The proposed approach does not need recalculate the precoding matrix and is robust to multiple data stream transmission.

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Recio, Adolfo Leon. "Spectrum-Aware Orthogonal Frequency Division Multiplexing". Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/30193.

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Reconfigurable computing architectures are well suited for the dynamic data flow processing requirements of software-defined radio. The software radio concept has quickly evolved to include spectrum sensing, awareness, and cognitive algorithms for machine learning resulting in the cognitive radio model. This work explores the application of reconfigurable hardware to the physical layer of cognitive radios using non-contiguous multi-carrier radio techniques. The practical tasks of spectrum sensing, frame detection, synchronization, channel estimation, and mutual interference mitigation are challenges in the communications and the computing fields that are addressed to optimally utilize the capacity of opportunistically allocated spectrum bands. FPGA implementations of parameterizable OFDM and filter bank multi-carrier (FBMC) radio prototypes with spectrum awareness and non-contiguous sub-carrier allocation were completed and tested over-the-air. Sub-carrier sparseness assumptions were validated under practical implementation and performance considerations. A novel algorithm for frame detection and synchronization with mutual interference rejection applicable to the FBMC case was proposed and tested.
Ph. D.

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Challakere, Nagaravind. "Carrier Frequency Offset Estimation for Orthogonal Frequency Division Multiplexing". DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1423.

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This thesis presents a novel method to solve the problem of estimating the carrier frequency set in an Orthogonal Frequency Division Multiplexing (OFDM) system. The approach is based on the minimization of the probability of symbol error. Hence, this approach is called the Minimum Symbol Error Rate (MSER) approach. An existing approach based on Maximum Likelihood (ML) is chosen to benchmark the performance of the MSER-based algorithm. The MSER approach is computationally intensive. The thesis evaluates the approximations that can be made to the MSER-based objective function to make the computation tractable. A modified gradient function based on the MSER objective is developed which provides better performance characteristics than the ML-based estimator. The estimates produced by the MSER approach exhibit lower Mean Squared Error compared to the ML benchmark. The performance of MSER-based estimator is simulated with Quaternary Phase Shift Keying (QPSK) symbols, but the algorithm presented is applicable to all complex symbol constellations.

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Acácio, Luís Carlos Lorenzo. "Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing". Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-17122004-154902/.

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Esta dissertação trata da equalização no domínio do tempo de sistemas de comunicações digitais baseados em orthoghonal frequency-division multiplexing (OFDM), normalmente referida na literatura técnica como equalização pré-FFT. Tais sistemas foram originalmente projetados de modo a não necessitar de equalização, porém podem se beneficiar com seu uso, como mostrado a seguir. Foi implementado, em programa de computador, um simulador não codificado do sistema de televisão digital terrestre utilizado na Europa, o digital video broadcasting (DVB-T), que é baseado em OFDM e se encontra implantado com sucesso há alguns anos. Diversas simulações foram executadas comparando o método tradicional de recepção do sistema DVB-T com a versão equalizada proposta. Foram utilizadas várias técnicas de processamento digital de sinais para simular: a geração do sinal, sua passagem por um canal de comunicação com multipercurso, presença de ruído branco Gaussiano aditivo, equalização LMS (Least Mean Square), entre outros fenômenos importantes. Para um firme embasamento, o trabalho apresenta estudos matemáticos sobre a teoria geral do OFDM, modelos de canais de comunicação e o princípio básico do algoritmo LMS. Tendo-se utilizado o DVB-T como estudo de caso prático, não poderia deixar de constar uma descrição técnica desse sistema em que são apresentados vários dos detalhes e problemas envolvidos na geração e recepção do sinal. Com a finalidade de posicionar o leitor histórica e tecnologicamente, o texto inclui ainda uma revisão dos principais fatos que marcaram o desenvolvimento do OFDM desde os estudos iniciais até os dias de hoje.
This dissertation deals with time-domain equalization of digital communications systems based on orthoghonal frequency-division multiplexing (OFDM), usually referred as pre-FFT equalization in the technical literature. Such systems were originally designed to require no time equalization but can profit from its use, as is shown in this work. An uncoded simulator of the OFDM-based European system for terrestrial digital television transmission, the digital video broadcasting (DVB-T), was implemented in software. Many simulations were run to compare the performance of the traditional DVB-T reception method with the equalized version proposed. Several digital signal processing techniques were used to simulate as diverse fenomena as: generation of the source signal, effect of multipath communications channels, presence of additive white Gaussian noise, LMS (Least Mean Square) equalization, among others. In order to develop a solid base, the work includes mathematical studies about the general OFDM theory, models of communications channels and the basic principle of operation of the LMS algorithm. Since the DVB-T was used as a practical study case, a technical description of the system is presented, in which many problems and aspects about its generation and reception are discussed. To provide the reader with a historical and technological insight on the subject, this work also includes a summary of the landmarks in the development of the OFDM since the first experiments.

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Chen, Jianwu, i 陳建武. "Frequency synchronization in OFDM-based systems". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40687338.

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Chen, Jianwu. "Frequency synchronization in OFDM-based systems". Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B40687338.

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Li, Kai. "Fast orthogonal frequency division multiplexing (Fast-OFDM) for wireless communications". Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/17220/.

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This thesis presents research that has addressed various design issues related to an adapted orthogonal frequency division multiplexing scheme, namely Fast-OFDM. A comparative study of the system with conventional OFDM in various signal mapping conditions has been investigated. The thesis reports on performance assessment in terms of bit-error-rate (BER) performance, spectral efficiency, peak-to-average-power ratio (PAPR), nonlinear effects and adjacent channel interference (ACI) analysis. The results show that the performance of Fast-OFDM is comparable to OFDM for single dimensional modulation scheme, whereas for complex modulation schemes, the performance of Fast-OFDM degrades severely due to the loss of orthogonality between subcarriers. Two multi-carrier CDMA schemes, multi-carrier direct sequence CDMA (MC DS-CDMA) and multi-tone CDMA (MT-CDMA), have been studied in different modulation scenarios. The performance of the overlapping multi-carrier CDMA schemes compared to OFDM and Fast-OFDM has been evaluated in terms of BER, spectral efficiency, PAPR and ACI analysis. The results reveal that the overlapping multi-carrier CDMA systems are comparable to the Fast-OFDM system under single user condition. It is thus feasible to apply multi-carrier CDMA detection techniques in Fast-OFOM systems. Therefore, two different types of linear detectors, zero-forcing (ZF) and minimum mean square error (MMSE) have been employed in complex modulated Fast-OFDM, leading to improvement of system performance. Overall, the theoretical design and performance assessment issues addressed in this thesis provide an insight into the performance of Fast-OFDM in the presence of additive white Gaussian noise (AWGN). The results obtained can be used by receiver designers for improving signal recovery of complex modulated Fast-OFDM in future wireless communication systems.

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Prasetyo, Bhimantoro Yudho. "Synchronisation in OFDM systems". Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252282.

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Mohamed, Salma Darwish Abd Elaziz. "Modified Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (MACO-OFDM) system". Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25820.

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A modification to the Asymmetrically Clipped Optical OFDM (ACO-OFDM) technique, a well reported non-coherent optical implementation is proposed. A Modified ACO-OFDM (MACO-OFDM) system is developed to improve system performance at the expense of spectral efficiency. A MACO-OFDM system model is defined underpinned by a detailed mathematical framework verified through Monte Carlo simulations. System performance is compared to that of conventional ACO-OFDM. A 1.5 dB saving is achieved in the Bit Error Rate (BER) performance of 4-QAM ACO-OFDM after applying the proposed modification; the theoretical and simulation results are in good agreement. As the constellation size increases, the improvement in BER performance decreases. The research then treats the impact of atmospheric turbulence on the performance of both conventional ACO-OFDM and the proposed MACO-OFDM system. A Single Input Multiple Output (SIMO) approach using multiple receivers is employed to mitigate the impact of atmospheric turbulence. The performance of MACO-OFDM outperforms that of ACO-OFDM by nearly 3 dB, 4 dB, and 5 dB as the number of receiving apertures (nRx) increases as 1, 2, and 4 respectively in weak atmospheric turbulence; in moderate turbulence the performance is improved by 2 dB, and 4.5 dB for nRx=2, and nRx=4; and in strong turbulence, the BER performance is enhanced by nearly 2 dB and 4 dB for nRx=2 and nRx=4. The channel capacity of MACO-OFDM has been shown to be half that of conventional ACO-OFDM. The capacity of SIMO MACO-OFDM architecture in atmospheric turbulent channel is evaluated.

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Oz, Ersoy. "A comparison of timing methods in orthogonal frequency division multiplexing (OFDM) systems". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FOz.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Sept. 2004.
Thesis Advisor(s): Roberto Cristi, Murali Tummala. Includes bibliographical references (p. 169-173). Also available online.

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Książki na temat "OFDM (Orthogonal Frequency Division Multiplexing)"

Arijon, Ignacio M. Performance of an orthogonal frequency division multiplexing (OFDM) system in frequency selective channels. Manchester: University of Manchester, 1996.

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1974-, Li Guoqing, red. OFDM-based broadband wireless networks: Design and optimization. Hoboken, N.J: J. Wiley, 2005.

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OFDM towards fixed and mobile broadband wireless access. Boston, MA: Artech House, 2007.

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Wenk, Markus. MIMO-OFDM testbed: Challenges, implementations, and measurement results. Konstanz: Hartung-Gorre, 2010.

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Ramjee, Prasad, red. OFDM wireless multimedia communications. Boston: Artech House, 2000.

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Perels, Christop David. Frame-based MIMO-OFDM systems: Impairment estimation and compensation. Konstanz: Hartung-Gorre, 2008.

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Bader, Faouzi, i Nizar Zorba. Advances on processing for multiple carrier schemes: OFDM & OFDMA. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Häne, Simon. VLSI circuits for MIMO-OFDM physical layer. Konstanz: Hartung-Gorre, 2008.

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MIMO-OFDM wireless communications with MATLAB. Singapore: IEEE Press, 2010.

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Ivan, Djordjevic, red. OFDM for optical communications. Burlington, MA: Academic Press/Elsevier, 2010.

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Części książek na temat "OFDM (Orthogonal Frequency Division Multiplexing)"

Hu, Bin, Muhammad Irshad, Sohail M. Noman, Xilang Tang, Chen Song i Sami Ahmed Haider. "Design and Simulation of Orthogonal Frequency-Division Multiplexing (OFDM) Signaling". W 3D Imaging Technologies—Multidimensional Signal Processing and Deep Learning, 187–97. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3180-1_24.

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Rajanandhini, C., i S. P. K. Babu. "Comparison on Carrier Frequency Offset Estimation in Multi Band Orthogonal Frequency Division Multiplexing (OFDM) System". W Innovative Data Communication Technologies and Application, 551–60. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38040-3_62.

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Atarashi, Hiroyuki, i Mamoru Sawahashi. "Variable Spreading Factor Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM)". W Multi-Carrier Spread-Spectrum & Related Topics, 113–22. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3569-7_11.

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Jiang, Chunbo. "Performance Analysis of 10 Gbit/s Optical Orthogonal Frequency Division Multiplexing (OFDM) Signal Transmission System Over Multimode Fiber". W Electrical, Information Engineering and Mechatronics 2011, 1455–61. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2467-2_173.

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Abera, Workineh Gebeye. "Comparative Study of the Performances of Peak-to-Average Power Ratio (PAPR) Reduction Techniques for Orthogonal Frequency Division Multiplexing (OFDM) Signals". W Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 56–67. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95153-9_6.

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Hara, Shinsuke. "Orthogonal Frequency Division Multiplexing". W Handbook of Computer Networks, 591–605. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118256053.ch39.

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Fischer, Walter. "Orthogonal Frequency Division Multiplex (OFDM)". W Digital Television, 235–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05429-1_18.

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Kumar, Arvind, i Rajoo Pandey. "Orthogonal Frequency Division Multiplexing for IoT". W Electronic Devices and Circuit Design, 243–67. Boca Raton: Apple Academic Press, 2021. http://dx.doi.org/10.1201/9781003145776-15.

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Song, Jian. "Time-Domain Synchronous Orthogonal Frequency Division Multiplexing". W Encyclopedia of Wireless Networks, 1400–1403. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-78262-1_167.

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Song, Jian. "Time-Domain Synchronous Orthogonal Frequency Division Multiplexing". W Encyclopedia of Wireless Networks, 1–4. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-32903-1_167-1.

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Streszczenia konferencji na temat "OFDM (Orthogonal Frequency Division Multiplexing)"

Kabir, Waziha. "Orthogonal Frequency Division Multiplexing (OFDM)". W 2008 China-Japan Joint Microwave Conference (CJMW 2008). IEEE, 2008. http://dx.doi.org/10.1109/cjmw.2008.4772401.

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Kabir, W. "Orthogonal frequency division multiplexing (OFDM)". W China-Ireland International Conference on Information and Communications Technologies (CIICT 2008). IEE, 2008. http://dx.doi.org/10.1049/cp:20080773.

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Kuang, Yujun, Can Long, Keping Long, Jingsen Huang, Chaofeng Wu i Qianbin Chen. "Pseudo-orthogonal Carrier Interference Orthogonal Frequency Division Multiplexing (PO-CI/OFDM) Revisited". W COIN-NGNCON 2006 - The Joint International Conference on Optical Internet and Next Generation Network. IEEE, 2006. http://dx.doi.org/10.1109/coinngncon.2006.4454680.

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Suma, M. N., i B. Kanmani. "Developments in orthogonal frequency division multiplexing (OFDM) system-a survey". W 2011 Second Asian Himalayas International Conference on Internet (AH-ICI). IEEE, 2011. http://dx.doi.org/10.1109/ahici.2011.6113955.

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Tsonev, Dobroslav, Sinan Sinanovic i Harald Haas. "Novel Unipolar Orthogonal Frequency Division Multiplexing (U-OFDM) for Optical Wireless". W 2012 IEEE Vehicular Technology Conference (VTC 2012-Spring). IEEE, 2012. http://dx.doi.org/10.1109/vetecs.2012.6240060.

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Zhang Jun i Zhang Jian. "Hybrid orthogonal frequency division multiplexing (H-OFDM) for visible light communication". W 11th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM 2015). Institution of Engineering and Technology, 2015. http://dx.doi.org/10.1049/cp.2015.0732.

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Enright, Michael A., i C. C. Jay Kuo. "Rate-distortion optimized multimedia delivery via orthogonal frequency division multiplexing (OFDM)". W ITCom 2002: The Convergence of Information Technologies and Communications, redaktor Carl R. Nassar. SPIE, 2002. http://dx.doi.org/10.1117/12.455472.

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Singhal, Sneha, i Dheeraj Kumar Sharma. "Comparative Analysis of Clipping-filtering, SLM and PTS for PAPR Reduction Technique in OFDM System". W International Conference on Women Researchers in Electronics and Computing. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.114.32.

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Streszczenie:

Modulation scheme, orthogonal frequency division multiplexing (OFDM) uses multiple carriers to communicate and transmit data. It is used widely in wireless communication due to its numerous advantages. OFDM modulation is very advantageous as it reduces inter symbol interference, provides high data rate and it is not affected by narrow band effect. To operate OFDM effectively, its high value of peak to average power ratio should be reduced. In OFDM, power amplifier should be linear and accommodate amplitude variations to work efficiently. The high peak to average power ratio affects the performance of power amplifier.

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Wei Lu, Xiang Zhou, Long Gong i Zuqing Zhu. "Scalable network planning for elastic optical orthogonal frequency division multiplexing (OFDM) networks". W 2012 8th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP 2012). IEEE, 2012. http://dx.doi.org/10.1109/csndsp.2012.6292644.

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Suryani, Titiek, Suwadi, Hasan i Septriandi Wira Yoga. "Implementation and performance evaluation of orthogonal frequency division multiplexing (OFDM) using WARP". W 2015 International Seminar on Intelligent Technology and Its Applications (ISITIA). IEEE, 2015. http://dx.doi.org/10.1109/isitia.2015.7220024.

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