A novel fractionally spaced de-correlation decision feedback blind equalization algorithm
Yanping Zhang · Ship Science and Technology · 2009
Aiming at the defects of baud spaced based blind equalizer(FSE),a novel fractionally spaced de-correlation decision feedback blind equalization algorithm(FSDDFE)is proposed. The FSDDFE employs the FSE for obtaining the more detailed channel information,uses decision feedback filer to eliminate the effects of channel distortion or multi-path,and utilizes the de-correlation constants modulus algorithm to improve the convergent rate. In the proposed FSDDFE,the de-correlation constants modulus algorithm is introduced into the updating process of equalizer weight vectors. Accordingly,the FSDDFE outperforms the Baud spaced de-correlation decision feedback blind equalization(BSDDFE)algorithm and fractionally spaced decision feedback blind equalization(FSDFE)algorithm in improving convergent rate and reducing the mean square error. The efficiency of the FSDDFE is proofed via the simulation tests with underwater acoustic channel.