The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Muriel Medard - One of the best experts on this subject based on the ideXlab platform.
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on the non coherent wideband Multipath Fading relay channel
arXiv: Information Theory, 2010Co-Authors: Nadia Fawaz, Muriel MedardAbstract:We investigate the Multipath Fading relay channel in the limit of a large bandwidth, and in the non-coherent setting, where the channel state is unknown to all terminals, including the relay and the destination. We propose a hypergraph model of the wideband Multipath Fading relay channel, and show that its min-cut is achieved by a non-coherent peaky frequency binning scheme. The so-obtained lower bound on the capacity of the wideband Multipath Fading relay channel turns out to coincide with the block-Markov lower bound on the capacity of the wideband frequency-division Gaussian (FD-AWGN) relay channel. In certain cases, this achievable rate also meets the cut-set upper-bound, and thus reaches the capacity of the non-coherent wideband Multipath Fading relay channel.
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ISIT - On the non-coherent wideband Multipath Fading relay channel
2010 IEEE International Symposium on Information Theory, 2010Co-Authors: Nadia Fawaz, Muriel MedardAbstract:We investigate the Multipath Fading relay channel in the limit of a large bandwidth, and in the non-coherent setting, where the channel state is unknown to all terminals, including the relay and the destination.We propose a hypergraph model of the wideband Multipath Fading relay channel, and show that its min-cut is achieved by a non-coherent peaky frequency binning scheme. The so-obtained lower bound on the capacity of the wideband Multipath Fading relay channel turns out to coincide with the block-Markov lower bound on the capacity of the wideband frequency-division Gaussian (FD-AWGN) relay channel. In certain cases, this achievable rate also meets the cut-set upper-bound, and thus reaches the capacity of the non-coherent wideband Multipath Fading relay channel.
Nadia Fawaz - One of the best experts on this subject based on the ideXlab platform.
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on the non coherent wideband Multipath Fading relay channel
arXiv: Information Theory, 2010Co-Authors: Nadia Fawaz, Muriel MedardAbstract:We investigate the Multipath Fading relay channel in the limit of a large bandwidth, and in the non-coherent setting, where the channel state is unknown to all terminals, including the relay and the destination. We propose a hypergraph model of the wideband Multipath Fading relay channel, and show that its min-cut is achieved by a non-coherent peaky frequency binning scheme. The so-obtained lower bound on the capacity of the wideband Multipath Fading relay channel turns out to coincide with the block-Markov lower bound on the capacity of the wideband frequency-division Gaussian (FD-AWGN) relay channel. In certain cases, this achievable rate also meets the cut-set upper-bound, and thus reaches the capacity of the non-coherent wideband Multipath Fading relay channel.
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ISIT - On the non-coherent wideband Multipath Fading relay channel
2010 IEEE International Symposium on Information Theory, 2010Co-Authors: Nadia Fawaz, Muriel MedardAbstract:We investigate the Multipath Fading relay channel in the limit of a large bandwidth, and in the non-coherent setting, where the channel state is unknown to all terminals, including the relay and the destination.We propose a hypergraph model of the wideband Multipath Fading relay channel, and show that its min-cut is achieved by a non-coherent peaky frequency binning scheme. The so-obtained lower bound on the capacity of the wideband Multipath Fading relay channel turns out to coincide with the block-Markov lower bound on the capacity of the wideband frequency-division Gaussian (FD-AWGN) relay channel. In certain cases, this achievable rate also meets the cut-set upper-bound, and thus reaches the capacity of the non-coherent wideband Multipath Fading relay channel.
L. Zhou - One of the best experts on this subject based on the ideXlab platform.
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AINA (1) - Novel WPDM System Based on Channel Equalization for Multipath Fading Channels
20th International Conference on Advanced Information Networking and Applications - Volume 1 (AINA'06), 2006Co-Authors: L. ZhouAbstract:A novel wavelet packet division multiplexing (WPDM) system based on channel equalization is studied for Multipath Fading channels. The principle of WPDM is presented in this paper. New WPDM structures based on channel equalization and Htilde matrix based on ZF (zero forcing) algorithm are the two novel aspects of this system. The performance of the system under the Multipath Fading channels is analyzed
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OWDM system based on ML algorithm and blind identification in Multipath Fading channel
Electronics Letters, 2004Co-Authors: L. Zhou, Chao ChenAbstract:A novel OWDM system with blind identification based on the maximum likelihood (ML) algorithm is studied for the Multipath Fading channel. New OWDM structures based on the ML algorithm and blind identification and H matrix based on the ZF (zero forcing) algorithm are the two novel aspects of this system. The performance of the system under the Multipath Fading channel is analysed.
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WPDM system based on FSE and ML algorithm for Multipath Fading channel
VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference 2005., 1Co-Authors: L. Zhou, Guanghui Zhang, Jing LiuAbstract:In this paper, a novel wavelet packet division multiplexing (WPDM) system based on Fractionally Spaced Equalizers (FSE) and Maximum Likelihood (ML) algorithm is studied for Multipath Fading channels. New discrete wavelet packet transform structure based on FSE, which uses Least Mean Square (LMS) algorithm and ML detecting algorithm, are the two novel aspects of the presented system. It is demonstrated by simulation results that the FSE method is superior to the Zero-Forcing equalizers (ZFE) method in performance and the FSE-WPDM scheme can provide greater immunity to Multipath Fading channels and AWGN than the FSE-OFDM scheme.
Jing Liu - One of the best experts on this subject based on the ideXlab platform.
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WPDM system based on FSE and ML algorithm for Multipath Fading channel
VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference 2005., 1Co-Authors: L. Zhou, Guanghui Zhang, Jing LiuAbstract:In this paper, a novel wavelet packet division multiplexing (WPDM) system based on Fractionally Spaced Equalizers (FSE) and Maximum Likelihood (ML) algorithm is studied for Multipath Fading channels. New discrete wavelet packet transform structure based on FSE, which uses Least Mean Square (LMS) algorithm and ML detecting algorithm, are the two novel aspects of the presented system. It is demonstrated by simulation results that the FSE method is superior to the Zero-Forcing equalizers (ZFE) method in performance and the FSE-WPDM scheme can provide greater immunity to Multipath Fading channels and AWGN than the FSE-OFDM scheme.
Xiaojing Huang - One of the best experts on this subject based on the ideXlab platform.
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detection of temporally correlated signals over Multipath Fading channels
IEEE Transactions on Wireless Communications, 2013Co-Authors: Yifei Huang, Xiaojing HuangAbstract:An optimal detection method along with two reduced-complexity methods, modified energy detection (MED) and equal gain detection (EGD), under low signal-to-noise ratio (SNR) condition are proposed in this paper for detection of temporally correlated signals over Multipath Fading channels. By incorporating resolvable Multipaths and multiple antennas into system model, these detection methods are derived based on maximum log-likelihood ratio (LLR) test principal and using the same low SNR LLR approximation. Analytical performance expressions for MED and EGD are also given. Simulation results show that, when signal exhibits temporal correlation, the proposed optimal detection and EGD achieve better performance than conventional generalized likelihood ratio test through utilizing Multipath propagation. Further, the proposed MED is superior to conventional energy detection if it a priori signal temporal correlation information is exploited. It is also revealed that Multipath tap correlation can have either constructive or destructive effect to spectrum sensing. The proposed EGD is proven to be a practical technique for reliable spectrum sensing over Multipath Fading channels as it approaches optimal performance with low complexity.
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Performance of an interleaved spread spectrum OFDM system over Multipath Fading channels
2009Co-Authors: Xiaojing Huang, Eryk DutkiewiczAbstract:In this paper we propose an interleaved spread spectrum orthogonal frequency division multiplexing (ISS-OFDM) system and investigate its performance over frequency selective Multipath Fading channels. The purpose is to exploit frequency diversity capability, develop an e‐cient spectrum spreading algorithm and improve the system performance over frequency selective Multipath Fading channels. At transmitter, a spectrum spread ISS-OFDM signal is generated by employing OFDM modulation and interleaving techniques. At the receiver, two solutions including serial demodulation and parallel demodulation for diversity combing are proposed, in which the received signals are combined by using a maximum ratio combining (MRC) technique. The simulation indicates that higher frequency diversity is achieved, and the Bit Error Rate (BER) and Peak-to-Average Power Ratio (PAR) performances of the proposed ISS-OFDM system over frequency selective Multipath Fading channels are improved signiflcantly as compared with the conventional OFDM systems. Another unique characteristic is that the spectrum spreading factor and diversity order provided by the system are reconflgurable to achieve cognitive communications.