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We investigate the problem of precoding optimization in an amplify‐and‐forward multiple‐input‐multiple‐output relay system. Most reported works on this problem focus chiefly on the design of relay precoder without simultaneously optimizing the direct link. In this paper, we propose a method for joint source/relay precoder design, taking both direct and relay links into account. Our design is based...
This paper proposes a cooperation system jointing LDPC codes and OFDM modulation. Its principle is given in detail that the signal is encoded by LDPC and modulated with OFDM, moreover, transmit diversity is created when the relay station assists a sender by retransmitting its information signal to the destination. Furthermore, several simulation results are presented to validate the proposed approach...
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