针对传统阵列天线应用场景的不足以及复杂电磁环境下干扰对通信性能的巨大影响，基于柱面共形阵列天线，本文提出一种广义旁瓣对消算法进行自适应数字波束形成。所提出算法使用多个阵元构造辅助通道，在不造成信噪比损失的情况下通过阻塞矩阵、静态权矢量和动态权矢量对干扰进行对消。所采用的广义旁瓣对消算法相对于自适应旁瓣对消算法信干噪比更高，且波束旁瓣电平在-10dB以下。实验结果表明，基于柱面阵的广义旁瓣对消算法可在保留通信信号的同时，自适应在干扰方向形成凹口，解决因存在期望通信信号而造成的干扰抑制性能下降问题。
Aiming at the shortcomings of traditional array antenna application scenarios and the great impact of interference on communication performance in complex electromagnetic environment, based on cylindrical conformal array antenna, a generalized sidelobe canceller algorithm is proposed for adaptive digital beam forming. The proposed algorithm uses multiple array elements to construct the auxiliary channel, and cancels the interference through blocking matrix, static weight vector and dynamic weight vector without causing the loss of signal-to-noise ratio. Compared with the adaptive side--lobe cancellation algorithm, the generalized sidelobe cancellation algorithm has higher signal-to-interference noise ratio, and the beam sidelobe level is below -10dB. The experimental results show that the generalized sidelobe cancellation algorithm based on cylindrical array can adaptively form a notch in the interference direction while retaining the communication signal, so as to solve the problem of interference suppression performance degradation caused by the existence of expected communication signal.
2022,44(11): 151-155 收稿日期：2022-01-21
DOI：10.3404/j.issn.1672-7649.2022.11.031
分类号：U665
作者简介：窦茂森(1979-)，男，工程师，研究方向为无线通信
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