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虽然信道均衡技术已经被广泛地研究,但作为均衡技术的一个延伸,信道缩短技术还没有引起足够的重视。在使用循环前缀的情况下,可以不用完全补偿信道多径带来的干扰,只需要部分补偿,即缩短信道,可用于减少最大似然序列估计和多用户检测的复杂度。研究了在发送训练序列情况下以及基于盲信号处理的信道缩短算法。显示了传统的盲均衡算法不能简单地应用到信道缩短问题之上。
Although channel equalization techniques have been widely studied, as an extension of equalization techniques, channel reduction techniques have not received enough attention. With a cyclic prefix, it is not necessary to completely compensate for the interference caused by channel multipathing, only partial compensation, ie shortening the channel, can be used to reduce the complexity of maximum likelihood sequence estimation and multi-user detection. The channel shortening algorithm is studied under the condition of sending training sequence and based on blind signal processing. It shows that the traditional blind equalization algorithm can not be simply applied to the channel shortening problem.