不等式约束宽带自适应恒定束宽波束形成算法

发布时间：2018-01-22 01:05

本文关键词： 宽带自适应波束形成预延迟误差不等式约束空间响应变化(SRV)约束恒定束宽　出处：《高技术通讯》2014年04期 　论文类型：期刊论文

【摘要】：针对传统宽带自适应波束形成算法存在预延迟补偿误差时性能恶化的问题,提出一种基于不等式约束的宽带自适应恒定束宽波束形成算法。该算法首先对期望方向上不同频点阵列响应施加不等式约束,再通过空间响应变化(SRV)约束实现恒定束宽特性,将期望方向上的阵列响应约束简化为对某一参考频点的约束,实现无需预延迟补偿的宽带恒定束宽波束形成,最后将算法转化为二阶锥规划问题,并通过内点法求解得到其复数域权系数。仿真结果表明该算法无需预延迟补偿,具有良好的恒定束宽特性及较高的阵列输出性能,且可以自适应地抑制强干扰信号。
[Abstract]:The traditional wideband adaptive beamforming algorithm has the problem of performance deterioration when there is a pre-delay compensation error. A wideband adaptive constant beamwidth beamforming algorithm based on inequality constraints is proposed, which first imposes inequality constraints on the array responses of different frequency points in the desired direction. Then the constant beam width is realized by the spatial response variation (SRV) constraint, and the array response constraint in the desired direction is simplified as the constraint to a certain reference frequency point. Broadband constant beamwidth beamforming without pre-delay compensation is realized. Finally, the algorithm is transformed into a second-order cone programming problem. The complex domain weight coefficient is obtained by the interior point method. The simulation results show that the algorithm has good constant beam width and high array output performance without pre-delay compensation. And the strong interference signal can be adaptively suppressed.
【作者单位】：解放军信息工程大学;
【基金】：863计划(2011AA7031015)资助项目
【分类号】：TN911.7
【正文快照】： 0引言宽带波束形成技术可广泛应用于雷达、无线通信、声纳、麦克风阵列等领域,是阵列信号处理的研究热点之一[13]。波束形成的主要目的是对不同来向的阵列接收信号进行采样,并通过一定的加权处理增强期望信号,同时抑制干扰信号和噪声。宽带波束形成技术可分为与接收信号无关

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