摘要
CDMA系统中,信号在无线信道中传输,由于多用户同时同频传输和多径衰落的存在,导致多址干扰(MAI)和符号间干扰(ISI),使系统接收机的性能下降。空时接收机(2-D RAKE)能够有效地抑制MAI和对抗多径衰落,这里介绍了几种接收机的工作特点,并对各种空时接收机进行了详细的分析和比较。
In Code - Division Multiple Access(CDMA) system, Multiple Access Interference(MAI) and Inter - Symbol Interference(ISI) are caused due to multiple users transmitting at the same time and frequency,and the existence of multi - path fading while signal transimitting through the wireless channel. As a result,the performance of system receiver degrades. Space -time receivers (2 -DRAKE) can effectively suppress MAI and fight against MPI. In this paper, the characteristics for several spacetime receivers are discussed. At the same time,each receiver is analyzed and compared detailedly.
出处
《现代电子技术》
2009年第19期7-9,13,共4页
Modern Electronics Technique
基金
国家自然科学基金资助项目(60572089)