摘要
MIMO系统中的角度功率谱有多种分布形式,所以经典多普勒功率谱不再适用。针对常用的均匀分布、余弦分布、高斯分布和拉氏分布的入射波角度功率谱,分别推导了多谱勒功率谱解析式。通过仿真比较了不同角度功率谱下的多普勒功率谱,并分析各种参数对其的影响。这些工作对MIMO信道中频率扩散的刻画做了拓展。
Classical Doppler Power Spectral (DPS) is not applicable because there are many kinds of distribution of Power Azimuth Spectrum (PAS) in MIMO system. Respective analytical and general expressions were derived according to different commonly-used PASs of uniform, cosine, Gaussian and Laplacian distribution. DPSs of different PAS were compared by simulation, and then the effects of various parameters were analyzed. These extend the research of representation of frequency scattering in MIMO channel.
出处
《计算机应用》
CSCD
北大核心
2007年第8期1846-1848,1851,共4页
journal of Computer Applications
基金
国防预研究项目资助(6130320)
关键词
MIMO
多径衰落
多谱勒功率谱
角度功率谱
Multi-Input Multi-Output (MIMO)
muhipath fading
Doppler Power Spectrum (DPS)
Power Azimuth Spectrum (PAS)