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| A Structure and Algorithm of Wideband Blind Equalizer Based on Subband Decomposition Technique |
| Zhang Wei①; Jin Guang-ming②; Dai Xu-chu① |
| ①Electronic Engineering and Information Science Department, USTC, Hefei 230027, China; ②Jiangsu Institute of Administrators, Nanjing 210008, China |
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Abstract In high speed wideband wireless communications, the duration of channel’s 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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Received: 20 November 2007
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2009, Vol. 31 
