双瑞利衰落对传输系统性能的影响

doi:10.3969/j.issn.1001-2400.2011.05.028

Abstract

Abstract:

Based on statistical properties of the receiving signal-to-noise ratio (SNR), the paper investigates error performance of the transmission system in double-Rayleigh fading. It analyses the outage probability and diversity gains of the system. A generalized formula for the average symbol error rate (ASER) of various M-ary modulations is derived by the moment generating function based approach and closed-form expressions for ASER for binary modulations are obtained. Simulation results show that, compared to Rayleigh fading, the outage performance and ASER in double-Rayleigh fading become worse than those in Rayleigh fading and the information rate is further limited consequently. The full diversity gain of unity in achievable SNR regions is difficult to acquire at the receiver under double-Rayleigh fading conditions. About 3dB SNR losses on system performance are induced by differentially coherent M-DPSK compared to coherent M-PSK.

Key words: double-Rayleigh fading, signal-to-noise ratio, outage probability, average symbol error rate, diversity gain, moment generating function

CLC Number:

TN911.3

LI Zhaoxun;HU Hanying;REN Xiukun;CAO Wenkui. Influences of double-Rayleigh fading on transmission system performance[J].J4, 2011, 38(5): 172-177.

References

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Influences of double-Rayleigh fading on transmission system performance

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