Applications of the LMS Algorithm in Smart Antenna Based on LCMV Criterion

摘要

Software radio system provides a good platform for the smart antenna beamforming,and the smart anttena can also meet the requirements of the software radio system's antenna. Beamforming algorithm is the key technology in smart antenna,while LMS algorithm is one of the classic algorithm. In this paper, the LMS adaptive iterative algorithm under LCMV criterion is proposed to reduce the time of weight calculation. At the same time,based on steering vector expansion method, the vector of gradient search phase error is compensated for the inaccuracy of the desired signal steering vector so that the steering vector of true desired signal is obtained,and that the DOA estimation error can be avoided. The simulation speed and the robustness get improved,and the simulation results verify the effectiveness of the algorithm.