Blind Adaptive Beamforming Algorithm Research

This paper deals with the problem of robust adaptive aimy beanifonning for eyclostationaiy signals .By exploiting the signal cyclostationarity, the LSSCORE algorithm presented in a paper by Agee. etc a]. has been sho~i to effective in performing adaptive beamforming ~~ithout requiring the direction vector of the desired signals .Howevei; this algorithm suffers from severe performance degmdalion if the step-size is fixed.In this paper,we first analysize the properties ofcyclostationaiy signals and some typical blind beamforming algorithms are presented. Furthcnnore. we dicuss the performance of these algorithms .To solve the pi-oblem of LSSCORE , we propose variable step-size LMS (VSLMS) algorithm.VSLMSalgorithm is a popular approach to adaptive filtering ,wl iich can provide improved performance while maintaining the simplicity and robustness of conventional fixed step-size LMS algorithm.Simulation examples for confirming the theoretical analysis and showing the effectiveness of the proposed method are provided.