Subband method for broadband arrays beamforming

A subband adaptive beamformer with general parameter filter banks (GPFB) for broadband array antennas is presented, which is used to enhance performance of suppressing the interference and accelerate convergence speed of weights. Instead of the conventional FFT filter banks, GPFB are utilized to partition the frequency band into several subbands without aliasing between them almost. Simulation results demonstrate that as subbands running at downsampling and in manner of parallel, the loads of computational processing costs, compared with traditional fullband methods, can be alleviated, deep suppression of the interference and convergence speed of weights are also improved.

[1]  T. J. Shepherd,et al.  A systolic array processor for MVDR beamforming , 1989 .

[2]  Wei Liu,et al.  A subband-selective broadband GSC with cosine-modulated blocking matrix , 2004, IEEE Transactions on Antennas and Propagation.

[3]  Sathish Chandran Wideband adaptive beamforming array with improved radiation characteristics , 2005, IEEE Transactions on Wireless Communications.

[4]  P. Vaidyanathan Multirate Systems And Filter Banks , 1992 .

[5]  Fuliang Yin,et al.  SUBBAND ADAPTIVE BEAMFORMING FOR MICROPHONE ARRAY SPEECH ENHANCEMENT , 2006, 2006 8th international Conference on Signal Processing.

[6]  P. Russer,et al.  Signal processing for wideband smart antenna array applications , 2004, IEEE Microwave Magazine.

[7]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[8]  I.K. Proudler,et al.  Computationally efficient QRD-based wide-band beamforming , 1990, International Conference on Acoustics, Speech, and Signal Processing.

[9]  Harry L. Van Trees,et al.  Optimum Array Processing , 2002 .