摘要
提出一种相干干扰下自适应波束形成方法。该方法同时约束非相干干扰与相干干扰,更好地实现对此两类干扰方向的自适应零陷滤波。采用变换预处理,避免抑制期望信号;恢复噪声特性并采用对角加载技术,增强算法稳健性;采用拉格朗日乘子法得到最优波束形成算法。理论分析与仿真结果表明,保持阵列孔径不变时,该算法提高了输出信干噪比和稳健性。
A method of adaptive beamforming in the presence of coherent interference is proposed. Meanwhile restraining nonco- herent interference and coherent interference, nulls of these types of interference directions are formed. Using transform preprocess- ing, suppression of the desired signals is avoided. Recovering characteristics of the noise and using diagonal loading techniques, the robustness of algorithm is improved. And then applying Lagrange multiplier, the optimal beamforming algorithm is presented. Simula- tion results show that output signal-to-interference-plus-noise （SINR） and robustness are increased when keeping the array aper- ture invariable.
出处
《电子技术应用》
北大核心
2012年第10期92-95,共4页
Application of Electronic Technique
关键词
自适应波束形成
相干干扰
辅助变换
空间平滑
稳健性
adaptive beamforming
coherent interference
complementally transformed
spatial smoothing
robustness
