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在码分多址系统中,多址干扰和远近效应是影响系统性能、限制系统容量的主要因素。为了抑制多址干扰和远近效应对DS/CDMA系统的影响,可以采取各种数字滤波技术。本文介绍了DS/CDMA系统中目前所采用的时域和空间域数字滤波技术,然后对这两种数字滤波技术提出了自己的一些看法。
In code division multiple access system, multiple access interference and far and near effect are the main factors affecting system performance and limiting system capacity. In order to suppress the impact of multiple access interference and near-far effects on the DS / CDMA system, various digital filtering technologies can be adopted. This article introduces the current digital and time domain filtering techniques used in DS / CDMA systems, and then puts forward some opinions on these two digital filtering techniques.