Rician-Nakagimi信道中正交空时分组码的近似性能分析

Approximate performance analysis of orthogonal space-time block code over Rician-Nakagami fading channels

在Rician-Nakagami信道中,正交空时分组码在MPSK和MQAM调制下符号错误概率已有精确的闭式表达式.这些结果由复杂的多元超几何函数表示.为了降低理论分析的复杂度,采用梯形法理论进行近似性能分析,即在MPSK和MQAM调制下,将两者的平均符号错误概率的积分表达式进行分段,每个分段区间用梯形取代,并给出了其符号错误概率的近似封闭表达式.仿真结果表明,即使在较小的分段数目下,采用梯形法的近似性能曲线与精确性能曲线仍吻合很好.

The exact closed-form symbol error probability （SEB） expressions of orthogonal space-time block code （OSTBC） with M-ary phase shift keying （MPSK） and M-ary quadrature amplitude modulation （MQAM） over Rician-Nakagami fading channels have been achieved. These results are expressed in terms of intractable multivariate hypergeometric function. Hence, in order to reduce the theoretical analysis complexity, the trapezia methods for approximate performance analysis are adopted, that is, under MPSK and MQAM, dividing their average SEB integral expressions into segments, each replaced by a trapezium, and the approximate closed-forms for SEB are given. The simulation proves that the approximate performance curves perfectly agree with the theoretically precise ones even though the segments for trapezia method become very small.