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CDMA系统中的信道估计和多址干扰
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多址干扰是CDMA系统中较为突出的干扰，利用多个用户信息的干扰对消技术可以有效地抑制这种干扰，而干扰对消技术的实现需要信道的衰落估计。该文介绍了信道估计技术及多用户检测技术，并通过数值分析说明用户数及信道估计偏差对多址干扰对消技术性能的影响。
关 键 词 码分多址; 信道估计; 多址干扰; 干扰对消
Abstract Multiple access interference is one kind of main interference in CDMA system. It can be restrained effectively by interference cancellation , and the realization of this technology needs the estimation of fading channels. This paper introduces the technology of channel estimation and multiple access interference, and states how user amount and deviation of channel estimation can affect the performance of multiple access interference cancellation technology basing on the data analysis result.
Key words code division multiple access; channel estimation; multiple access interference; interference cancellation
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