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针对非高斯噪声环境衰落信道中的正交空时分组码(OSTBC)性能进行研究.基于非高斯噪声建模理论,将空时分组码系统的噪声环境建模为对称α-稳定分布噪声,给出噪声采样信号的概率密度函数及特征函数.推导了基于最大似然(ML)译码的OSTBC系统的误符号率(SER),并且对不同衰落信道条件下系统性能进行估计.仿真结果表明,OSTBC的性能随噪声特征指数α的减小而降低.当噪声脉冲性较强时,系统对于Nakagami-m和Rician衰落信道的参数m和K不再敏感.
The performance of orthogonal space-time block code (OSTBC) in non-Gaussian noise fading channel is studied.Non-Gaussian noise modeling theory is used to model the noise environment of space-time block code system as symmetrical α-stable distributed noise The probability density function and the eigen function of the noise-sampled signal are derived. The symbol error rate (SER) of the OSTBC system based on maximum likelihood (ML) decoding is derived and the performance of the system under different fading channel conditions is estimated. The performance of OSTBC decreases with the decrease of noise characteristic index α, and the system is no longer sensitive to the parameters m and K of Nakagami-m and Rician fading channels when the noise impulsiveness is strong.