摘要
针对常规自适应波束形成器只能用于非相干信号波束形成这一缺陷,提出了一种基于二阶锥规划的相干信号自适应波束形成方法。首先对接收到的信号的自相关矩阵进行Toeplitz重构,使其秩等于干扰和信号的数目;然后在保证波束形成器对期望信号无失真输出和波束旁瓣级电平低于给定要求值的前提下,使波束输出功率最小化,同时对系数的范数进行约束以保证波束形成器的稳健性;最后将波束形成器的设计问题转化为凸优化中的二阶锥规划问题,用MATLAB中的SeDuMi工具箱进行快速求解;仿真结果和数据分析表明了该方法有效性。
The traditional adaptive beamforming can only be applied to the incoherent signals, for which a modified adaptive beamforming based on second-order cone programming（SOCP） is proposed for the coherent jamming signals. Firstly, the correlation matrix of received data is restructured in order to make its rank equal to the number of the signals. Then the optimum beam-forming is designed with this method according to the rule of minimizing the beamformer＇ s total output power while keeping the distortionless response in the direction of desired signal and keeping the constant sidelobe lev- el. Moreover, the original problem can be translated into a SOCP one, which can be solved effectively via SeDuMi. Simulations and data analysis prove the efficiency of this approach.
出处
《电子信息对抗技术》
2013年第2期10-14,33,共6页
Electronic Information Warfare Technology
关键词
线性阵列
自适应波束形成
矩阵重构
二阶锥规划
linear army
adaptive beamforming
restructuring of matrix
second-order cone programming
