中文摘要：

首先从数学公式分析了多用户相控阵通信系统的通道时延将会引起调制数据过零点出现偏移；再针对多通道时延不一致的情况，通过理论和仿真分析发现，如果空分处理前不进行通道问时延均衡而直接进行数字波束形成处理，会使得输出信号失真，系统误码性能恶化。

英文摘要：

Mathematical formula is used to show that zero-crossing of modulation data shifting are caused by the time-delay in channels. Then for the time-delay inconsistency in multi-channel, theoretieal analysis and simulation show that if there is no delay equalization in channels before space division but directly DBF processing, the output signal distortion will occur and the BER performance will deteriorate.