Affiliation of Author(s):电子信息工程学院
Journal:RADIOENGINEERING
Key Words:Joint iterative SISO decoder coded-cooperation distributed asymmetric turbo code CMI multiple-input multiple-output (MIMO) channel side information
Abstract:This paper investigates the multiple relay coded cooperation scheme based on asymmetric turbo code (ATC) with multiple receive antennas over Rayleigh block fading channels. An encoding scheme based on ATC is proposed for coded-cooperation, i.e. distributed asymmetric turbo code (DATC). The code matched interleaver (CMI) is selected by a rigorous comparison with a uniform-random interleaver (URI). This optimum choice of interleaver at the relay nodes provides maximum benefit from DATC coded-cooperation scheme. Practically in any wireless communication system, the channel side information (CSI) is usually unknown at the receiver. Therefore, spatial normalized least mean square (NLMS) adaptive transversal filters are employed to estimate the CSI at the destination node. Moreover, in coded-cooperation scheme, the effectiveness and validation of spatial NLMS adaptive transversal filters is also verified by simulation results. Quadrature phase shift keying (QPSK) is used in coded cooperation scheme and corresponding soft-demodulators are employed along with joint iterative soft-input soft-output (SISO) decoder at the destination node. Monte Carlo simulations show that the proposed scheme incorporates coding gain, diversity gain and cooperation gain successfully, which eventually results in net gain of 2.7 to 3.5 dBs over non-cooperation ATC counterpart.
ISSN No.:1210-2512
Translation or Not:no
Date of Publication:2017-09-01
Co-author:Mughal, Shoaib,Ejaz, Saqib,Ahmed, Syed Hassan,Umar, Rahim
Correspondence Author:Mughal, Shoaib,Yang Fengfan
Date of Publication:2017-09-01