双瑞利衰落下AP中继车际通信系统误符号率分析

doi:10.3969/j.issn.1001-2400.2010.05.030

Abstract

Abstract:

The paper studies the error performance for the AP (access-point) relayed inter-vehicular communication (IVC) system based on the double-Rayleigh fading model. It analyzes the statistical properties of the receiving end-to-end signal-to-noise ratio (SNR) by assuming amplify-and-forward relaying strategy. A generalized expression for the average symbol error rate (ASER) for performance evaluation of various M-ary modulations is derived through MGF (moment generating function) based approach for the system. Simulation results show that the ASER decreases by applying the relaying technique in the IVC system. They also manifest that about 2～3dB SNR losses of the system performance are induced by differentially coherent M-DPSK versus coherent M-PSK and they are dependent on specific values of SNR and M. Compared with the equal power allocation strategy, the optimal power allocation method improves error performance by 2.4dB maximum gains for the cooperative IVC system.

Key words: inter-vehicular communication, relay, symbol error rate, double-Rayleigh fading, moment generating function, optimal power allocation

LI Zhao-xun;LI Feng;WU Guo-feng;HU Han-ying. Symbol-error-rate analysis in the AP-relayed inter-vehicular communication system over double-Rayleigh fading channels[J].J4, 2010, 37(5): 947-952+970.

References

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Symbol-error-rate analysis in the AP-relayed inter-vehicular communication system over double-Rayleigh fading channels

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