一种基于子带分解技术的宽带盲均衡器结构和算法

张炜; 金光明; 戴旭初

doi:10.3724/SP.J.1146.2007.01794

一种基于子带分解技术的宽带盲均衡器结构和算法

doi: 10.3724/SP.J.1146.2007.01794

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出版历程
- 收稿日期: 2007-11-20
- 修回日期: 2008-04-29
- 刊出日期: 2009-03-19

A Structure and Algorithm of Wideband Blind Equalizer Based on Subband Decomposition Technique

摘要

摘要: 高速宽带无线通信中，多径传输信道可能导致几百个符号间的相互干扰，这使得接收端的线性盲均衡器的收敛速度极其缓慢。基于子带分解技术，该文提出了一种适合于高速宽带无线传输的盲均衡器结构及算法。该结构将子带分解技术和全频带的子卷积方法有机结合在一起，明显地加快了高速宽带传输条件下线性盲均衡器的收敛速度；同时通过对接收数据进行降低速率的并行处理，该结构还能减小运算复杂度，有利于工程的实时实现。仿真实验结果验证了文中提出的结构和算法的有效性。
- 盲均衡器;子带分解技术;Stop-and-go原理
Abstract: In high speed wideband wireless communications, the duration of channels impulse response is about hundreds of symbol periods, which causes the convergence speed of linear blind equalizer to be much slower. Based on subband decomposition technique, a new structure and algorithm of the blind equalizer is proposed for high speed wideband wireless transmission. The proposed blind equalizer effectively combines the subband decomposition technique and sub-convolution method, and its convergence speed is faster than that of the traditional blind equalizer in high speed wideband transmission. On the other hand, since down-sampling and parallel processing of subband signals are used, the proposed structure possesses lower computational complexity, which is beneficial to its real-time realization in engineering applications. Computer simulations are presented to illustrate the efficiency of the new blind equalizer.

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