On Bit Error Performance of Full-Rate Signal Space Cooperative Communication over Nakagami-m Fading Channels


Signal area cooperative (SSC) system can realize full-rate transmission whereas achieving most cooperative diversity gain at the same time by using the signal space diversity technique. In this letter, we investigate the bit error rate (BER) performance of the SSC system over independent and non-identically distributed ( Nakagami-m fading channels. Notably, an correct analytical expression for the overall BER is derived. Moreover, a decent approximation for the BER is obtained to reveal that the achievable diversity order of the SSC system is m_SD+min m_SR,m_RD , where m_SD, m_SR, and m_RD are the Nakagami fading parameters for the source-destination, source-relay, and relay-destination channels, respectively. Simulation results are presented to verify our theoretical analysis.

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