摘要
推导了一种基于拉普拉斯角能量分布的天线相关性的精确算法表达式与近似表达式,分析了影响MIMO系统天线空间相关性的因素,并将之用于对MIMO系统的BER分析。在均匀线性阵列跟圆形阵列中,对比了不同衰落因子下,系统BER随信噪比、天线之间距离以及信号到达角的变化关系。分析了决定系统BER的因素以及降低系统BER的方法。最后通过对近似算法的研究发现,在衰落因子a值比较大时,近似算法能很好地代替精确算法,并能大大简化计算复杂度。
In this letter, we derive an exact and approximate equation of spatial correlation based on Laplaciian energy distribution,and analyze the factors which have the effect on saptial correlation and use the results into the analysis of the BER performance of MIMO system. We analyze them in the uniform liner array （ULA） and uniform circular array （UCA） respectively, in which we present relationships of the BER versus the SNR, distance between antennas, and the angle of arrival （AOA） with different decay factors. And we also analyze the factors that determine the BER of the system, and the method of reducing the BER. Finally, when the value of decay factor a is big, the approximate analysis exhibits good agreement with the exact analysis, and makes the computational complexity greatly simplified.
出处
《电信科学》
北大核心
2012年第5期54-59,共6页
Telecommunications Science
