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ANALYSIS OF FAST ADAPTIVE MI-NLMS BEAMFORMING ALGORITHM FOR SMART ANTENNA SYSTEM

机译:智能天线系统的快速自适应MI-NLMS变形算法分析

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摘要

A novel fast adaptive matrix inversion normalized least mean square (MI-NLMS) beamforming algorithm for smart antenna system is analyzed in this paper. The MI-NLMS adaptive beamforming algorithm was developed by combining the sample matrix inversion (SMI) and the normalized least mean square (NLMS) algorithms taking the individual good aspects of both algorithms; the block adaptive and sample by sample technique. The algorithm provides faster convergence speed and less complexity. Simulation results using MATLAB~?6.5 showed that the less complexity MI-NLMS yields 10 dB improvements in interference suppression towards the interferer at 90° and converge from the initial iteration. Simulation results in various signal environments are also presented to show the performance of the proposed algorithm.
机译:本文分析了一种新型的智能天线系统快速自适应矩阵求逆归一化最小均方(MI-NLMS)波束形成算法。 MI-NLMS自适应波束形成算法是通过结合样本矩阵求逆(SMI)和归一化最小均方(NLMS)算法而开发的,同时考虑了这两种算法的各自优点。块自适应和逐样本技术。该算法提供了更快的收敛速度和更低的复杂度。使用MATLAB〜?6.5进行的仿真结果表明,复杂度较低的MI-NLMS在90°处对干扰源的干扰抑制性能提高了10 dB,并且从初始迭代开始收敛。还给出了在各种信号环境下的仿真结果,以显示所提出算法的性能。

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