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间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。
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.
出处
《世界科技研究与发展》
CSCD
2013年第4期498-500,共3页
World Sci-Tech R&D
基金
国家自然科学基金(61001089)
重庆市自然科学基金(2010BB2049)资助
关键词
通道间时延不一致性
数字波束形成
数字相控阵多址通信
系统误码性能
time-delay inconsistency
digital beaming form
digital phased array multiple access communication system
the BER performanceof system
