双瑞利衰落信道下双天线接收系统分集特性分析

doi:10.3969/j.issn.1001-2400.2011.04.029

Abstract

Abstract:

On the basis of the double-Rayleigh fading model, the paper investigates the diversity performance and average symbol error rate (ASER) for the double-antenna receiving system assuming maximal ratio combining (MRC) and selection combining (SC) strategies. The statistical properties of the receiving signal-to-noise ratio (SNR) are analyzed and a generalized expression on ASER is derived through MGF (moment generating function) based approach for MRC and SC schemes. Numerical calculations show that the fading effects are mitigated and that the ASER of the system is decreased by double-antenna receiving methods. They also manifest that the effective diversity gain achievable, d_e, cannot reach the full diversity order and go up slowly with the increase in SNR in double-Rayleigh fading. It also decreases with the increase in modulating orders, e. g., while the SNR is 80dB, d_e is about 2.5dB for MRC or 2.41dB for SC under BPSK modulation and it drops to 1.25dB for MRC or 1.13dB for SC under 64QAM modulation.

Key words: double-Rayleigh fading, double antennas receiving, maximal ratio combining, selection combining, average symbol error rate, diversity gain

CLC Number:

TN850.9

LI Zhaoxun;HU Hanying. Diversity analysis of the double-antenna receiving system over double-Rayleigh fading channels[J].J4, 2011, 38(4): 160-166.

References

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Diversity analysis of the double-antenna receiving system over double-Rayleigh fading channels

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