In this paper, a MATLAB based smart antenna testbed that efficiently localizes the line-of-sight (LOS) source in the presence of multipath signals is developed. By exploiting the consistent amplitude nature of the LOS signal, a variant of Constant Modulus Algorithm, namely Multitarget-Least Square Constant Modulus Algorithm is employed to adapt and update the weights of the smart antenna for estimation of the direction-of-arrival (DOA) of the of the LOS and multipath interference signals. Performance is compared with the conventional and recently proposed algorithms in the same testbed with alike considerations. Simulation result shows that the proposed method of DOA estimation performs better in terms of probability of resolution and root mean square error.

中文翻译：

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智能天线系统的多径存在下有效源定位方法

在本文中，开发了一种基于MATLAB的智能天线测试平台，该平台可以在存在多径信号的情况下有效地定位视线（LOS）源。通过利用LOS信号的一致幅度特性，采用恒定模量算法的一种变体，即多目标最小二乘方恒定模量算法来适应和更新智能天线的权重，以估算到达方向（DOA） LOS和多径干扰信号。在相同的测试平台上，出于相同的考虑，将性能与常规算法和最近提出的算法进行了比较。仿真结果表明，提出的DOA估计方法在分辨率概率和均方根误差方面表现更好。