西安电子科技大学学报（自然科学版）2011，Vol.38Issue(4)：160-166,7.DOI:10.3969/j.issn.1001-2400.2011.04.029
双瑞利衰落信道下双天线接收系统分集特性分析
Diversity analysis of the double-antenna receiving system over double-Rayleigh fading channels
摘要
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 , 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 80 dB, dr is about 2. 5 dB for MRC or 2.41 dB for SC under BPSK modulation and it drops to 1. 25 dB for MRC or 1. 13 dB for SC under 64QAM modulation.关键词
双瑞利衰落/双天线接收/最大比合并/选择式合并/平均误符号率/分集增益Key words
double-Rayleigh fading/double antennas receiving/maximal ratio combining/selection combining/average symbol error rate/ diversity gain分类
信息技术与安全科学引用本文复制引用
李兆训,胡捍英..双瑞利衰落信道下双天线接收系统分集特性分析[J].西安电子科技大学学报（自然科学版）,2011,38(4):160-166,7.基金项目
国家科技重大专项资助项目(2009ZX03003-008-02,2009ZX03003-005 （）
