中文摘要：

为获得非高斯噪声环境衰落信道中正交空时分组码（OSTBC）的性能估计，对OSTBC的成对差错概率（PEP）进行了研究．基于物理统计Middleton ClassA噪声模型，通过将非高斯ClassA分布变换成条件高斯分布，给出空间依赖时间独立条件下OSTBC系统中噪声信号的联合概率密度函数．利用矩母函数（MGF）分析法推导ClassA噪声环境下最大似然接收机的成对差错概率的上界．对不同衰落信道中系统误符号率（SER）性能的仿真研究表明，在ClassA噪声环境下，OSTBC系统性能随噪声脉冲性的增强而下降．

英文摘要：

The average pairwise error probability （PEP） of orthogonal space-time block coding （OSTBC） was investigated to evaluate the performance of OSTBC over fading channels with non-Gaussian noise. Based on statistical-physical Middleton Class A noise model, the joint probability density function （pdf） of the noise signals in OSTBC systems under the assumption of dependence in space and independence in time was presented by transforming the non-Gaussian distribution into conditioned Gaussian distribution. Then the upper bound of PEP was derived for the maximum likelihood （ML） receiver in Class A noise environment with the moment generating function （MGF）. Simulations for symbol error rate （SER） over various fading channels show that the performance of OSTBC decreases with the impulsive nature of the noise increasing in Class A noise environment.