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Performance Analysis of LDPC on rician Fading channels

Frontiers of Electrical and Electronic Engineering in China 2006年第1期1卷 120-124页

作者： LIN Jia-ru WU Wei-ling School of Information Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

This paper analyzes and simulates the performance of irregular low-density parity check(LDPC)codes on rician fading *** authors also modified the brief propagation decoding algorithm,proved the symmetry and showed the stability conditions of the channels,and calculated the Shannon limits on rician channels in this *** using Visual C++programming to simulate the performance,the result indicates that when code length N=3,072 and code rate R=1/3,the difference with the Shannon limit is about 2 ***,the performance of LDPC is also very effective on all kinds of channels,including the rician kind.

关键词： LDPC fading channel rician channels

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Modified Wiener Beamforming for Indoor Channel Improvement

Modified Wiener Beamforming for Indoor Channel Improvement

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1998 International Conference on Communication Technology

作者： Gao Xing Huang Ya-Ru Inner Mongolia University

ISBN: (纸本)7800908275

＜正＞The impulse response of an indoor channel varies with different environments and spatial positions of a transceiver pair as a function of the phase relationship among individual multipath components that have variety of time *** factor results in various fading especially in a chip duration of the Direct Sequence Code Division Multiple（DS-CDMA） *** solve this problem,a Modified Wiener Beamforming（MWB） has been proposed to co-phase the multipath components and then combine them by maximum ratio combining in a chip duration We derive formulas for MWB with a method to separate and estimate multipath vectors through each *** purpose is to isolate and recombine multipath components before they are added together as a phasor to produce ***,the fading of Rayleigh or Rice distributed multipath in a chip duration can be reduced to a *** results are presented by using a three-dimension ray tracing to support the proposed method.

关键词： array signal processing spread spectrum communication code division multiple access multiuser channels multipath channels rician channels Rayleigh channels indoor radio ray tracing transient response direction-of-arrival estimation modified Wiener beamforming indoor channel improvement impulse response indoor channel spatial positions transceiver pair phase relationship multipath components time delays chip duration direct sequence code division multiple access DS-CDMA system maximum ratio combining multipath vectors Rice distributed multipath Rayleigh distributed multipath simulation results 3D ray tracing antenna array

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Optimum Combining in rician Fading:Performance Analysis in Asymptotic SNR Regimes

Optimum Combining in Rician Fading:Performance Analysis in A...

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2008 IEEE International Conference on Communications(ICC 2008)

作者： Raymond H.Y.Louie Matthew R.McKay Iain B.Collings Telecommunications Lab School of Electrical and Information EngineeringUniversity of SydneyAustralia Wireless Technologies Laboratory ICT CentreCSIROSydneyAustralia Department of Electronic and Computer Engineering Hong Kong University of Science and Technology

This paper analyzes the performance of multiuser optimum combining （OC） systems where the desired user undergoes rician fading,and the received signals are corrupted by Rayleigh-faded interference and noise. We consider the SER and ergodic capacity in asymptotic SNR regimes,and derive new closed-form expressions for key performance parameters such as the diversity order,array gain,and wideband slope. These results clearly reveal the impact of the rician K-factor,which is shown to be advantageous to performance in all cases.

关键词： rician channels Performance analysis Signal to noise ratio Diversity reception Receiving antennas Interference Paper technology Closed-form solution Adaptive arrays Linear antenna arrays

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