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Volume 32 Issue 4
Dec.  2010
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Li Jing, Ge Jian-hua, Wang Yong, Yao Hao. Design and Performance Analysis of Precoded Cooperative Communication System with Limited Feedback[J]. Journal of Electronics & Information Technology, 2010, 32(4): 799-804. doi: 10.3724/SP.J.1146.2009.00788
Citation: Li Jing, Ge Jian-hua, Wang Yong, Yao Hao. Design and Performance Analysis of Precoded Cooperative Communication System with Limited Feedback[J]. Journal of Electronics & Information Technology, 2010, 32(4): 799-804. doi: 10.3724/SP.J.1146.2009.00788

Design and Performance Analysis of Precoded Cooperative Communication System with Limited Feedback

doi: 10.3724/SP.J.1146.2009.00788
  • Received Date: 2009-05-22
  • Rev Recd Date: 2010-01-21
  • Publish Date: 2010-04-19
  • A Distributed Precoded Non-Orthogonal Cooperative Diversity (DP-NOCD) system with limited feedback is proposed, which utilizes the multi-antenna characteristic at the destination to make the preprocessed relay signals transmitted on the shared channel resources, so that the spectral efficiency and reliability of the traditional Orthogonal Cooperative Diversity (OCD) system can be improved simultaneously. With the Decode and Forward (DF) relay channel model and the virtual two-input multiple-output channel decomposed into two orthogonal sub-channels in the vector space, a precoding scheme is proposed to minimize the system Bit Error Rate (BER). The proposed scheme is effective in improving the BER performance and has a low feedback overhead. Simulation results show that in ideal cooperation scenarios, DP-NOCD system outperforms the non-cooperative system and the interference free OCD system by gains of 5~6.2 dB and 1~1.2 dB, respectively, when BER is 10-3.
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