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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 Class A噪声模型,通过将非高斯Class A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Class A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Class A噪声环境下,OSTBC系统性能随噪声脉冲性的增强而下降.
In order to obtain the OSTBC performance estimation of non-Gaussian noise fading channels, the pairwise error probability (PEP) of OSTBC is studied.Based on the physical statistics Middleton Class A noise model, A is transformed into conditional Gaussian distribution, and the joint probability density function of noise signal in OSTBC system is given under the condition of space-dependent time independence. The pairings of the maximum likelihood receiver in Class A noise environment are derived by using the MGF analysis The upper bound of error probability.The simulation study on the systematic error symbol rate (SER) performance in different fading channels shows that under Class A noises, the performance of OSTBC system decreases with the increase of impulsive noise.