传统的BLAST系统具有极高的频谱利用率，但是基于充分散射环境假设，即认为收发天线阵元之间完全独立，而这在宏蜂窝移动环境下一般并不成立。本文主要根据宏蜂窝MIMO信道模型，研究了AOA分布对V-BLAST系统的影响，通过对模拟实验结果的分析，指出MS一侧的AOA分布对室外MIMO系统性能起着关键性影响。关键词：V-BLAST；MIMO；相关；瑞利信道； AOAAstract：The traditional BLAST systems have drawn massive attentions among the researchers because of its high spectrum efficiency, but it is based on the assumptions of the rich-scattering environments, it means totally independent for the receivers and transmitters’ antenna elements. While the independence assumption is not factual in practical macro-cell mobile environments. Based on the macro-cell MIMO channel model proposed by Ali Abdi,the effect of s AOA angle spreads on V-BLAST system was investigated. By analyzing the simulations results, the distribution of MS side’s AOA have key influences on performance of outdoor MIMO systems.Key words: V-BLAST；MIMO； AOA