An exact error probability analysis of incremental opportunistic decode-and-forward relaying with feedback delay
WCNC(2012)
摘要
Incremental opportunistic relaying (IOR) has been proposed to increase the spectral efficiency of the two-phase cooperative transmissions by exploiting limited feedback from the destination node. Specifically, the relaying process is activated only if the source-destination channel is of insufficient quality. In this case, the feedback instructs the best relay to forward the source message to the destination in order to exploit the spatial diversity. In this work, we analyze the effect of feedback delay on the performance of IOR with decode-and-forward strategy. Particularly, we derive an exact expression for the average symbol error probability (SEP) of IOR with feedback delay over independent but not necessarily identically distributed Rayleigh fading channels. An approximate but tight closed-form expression for the SEP is also provided. Finally, we perform Monte Carlo simulations to verify the analytical results. The results show that IOR is robust to the feedback delay at sufficiently high signal-to-noise ratio.
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关键词
identically distributed rayleigh fading channels,symbol error probability,source-destination channel,spatial diversity,diversity reception,decode and forward communication,average symbol error probability,monte carlo simulations,cooperative communication,incremental opportunistic relaying,high signal-to-noise ratio,sep,source message,destination node,exact error probability analysis,incremental opportunistic decode-and-forward relaying,monte carlo methods,relaying process,two-phase cooperative transmissions,feedback delay,decode-and-forward relays,error statistics,closed-form expression,rayleigh channels,closed form expression,high signal to noise ratio,decoding,error probability,signal to noise ratio,spectral efficiency,neodymium,monte carlo simulation
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