关键词: 调零天线, 抗干扰, 波束合成, 收敛速度

Abstract: Abstract: When the continuous wave interference and impulse interference presence at the same time for the satellite navigation receiver, the nulling antenna will face the problem of low convergence speed and limited suppression performance to impulse interference assuming the classical LMS algorithm is taken to calculate the weight vector. A new strategy with two parallel calculations for weight vector is proposed according to the various signal characteristics on the condition that we can detect the impulse interference correctly. The new method choose only one weight vector from the two results as the last output of the antenna according whether the impulse interference exits. The theoretic analysis and computer simulation illustrate that the proposed approach could obtain a faster convergence speed and better suppression to the impulse interference compared with the classical LMS algorithm.

Key words: nulling antenna, interference suppression, beamforming, convergence speed