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首页> 外文期刊>IEICE Transactions on Communications >Robust Mvdr Beamforming Via Polynomial Rooting Calibration For Cdma Signals
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Robust Mvdr Beamforming Via Polynomial Rooting Calibration For Cdma Signals

机译:通过多项生根校准对Cdma信号进行稳健的Mvdr波束成形

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摘要

This letter deals with adaptive array beamforming based on a minimum variance distortionless response (MVDR) technique with robust capabilities for code-division multiple access signals. It has been shown that the MVDR beamformer suffers from the drawback of being very sensitive to pointing error over the eigenspace-based beamformers. For the purpose of efficient estimation and calibration, a highly efficient approach has been proposed that is implemented on polynomial rooting rather than spectral searching. However, this rooting method is suboptimal in the presence of the noise and multiple access interference (MAI). In this letter, we propose an improved polynomial rooting calibration method that is robust in both of the low signal-to-noise ratio and large MAI scenarios. Several computer simulations are provided for illustrating the effectiveness of the proposed method.
机译:这封信涉及基于最小方差无失真响应(MVDR)技术的自适应阵列波束成形,该技术具有强大的码分多址信号能力。已经表明,MVDR波束形成器具有以下缺点:对基于特征空间的波束形成器而言,其对指向误差非常敏感。为了有效的估计和校准,已经提出了一种高效的方法,该方法基于多项式求根而不是频谱搜索。但是,在存在噪声和多址干扰(MAI)的情况下,这种生根方法不是最佳的。在这封信中,我们提出了一种改进的多项式生根校准方法,该方法在低信噪比和大MAI情况下均很可靠。提供了几种计算机仿真来说明所提出方法的有效性。

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