吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (1): 303-310.doi: 10.13229/j.cnki.jdxbgxb201601046

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Design of adaptive broadband beamformer with fixed feedback weights

WU Kai, SU Tao, JIN Biao, YANG Tao   

  1. National Lab of Radar Signal Processing, Xidian University, Xi'an 710071, China
  • Received:2014-06-12 Online:2016-01-30 Published:2016-01-30

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Abstract: By introducing a feedback branch with fixed weights, a new adaptive broadband beamformer based on the Generalized Sidelobe Canceller (GSC) is designed. The feedback weights are obtained off-line through approximating the band-pass filter whose passband covers that of the interference. Also, the relationship between the interference suppression capability of the beamformer and the number of poles of the feedback branch is investigated. Compared with existing beamformer, since the feedforward branch of the new beamformer is exactly the same as the GSC, the complexity and amount of calculations of the updating procedure for feedforward weights are reduced. Meanwhile, the fixed feedback weights guarantee its stability. Besides, the flexibility of changing the number of poles strengths its interference suppression capability.

Key words: information processing, broadband adaptive beamforming, generalized sidelobe canceller, fixed feedback weights, signal to interference pulse noise ratio

CLC Number: 

  • TN958.92
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