摘要
对水平极化对数周期圆形天线阵中单元天线的方向图与相位特性进行了分析,指出阵列流形失配是导致传统波束形成算法性能下降甚至失效的主要原因。对此,结合最小二乘恒模算法(LSCMA)和对角加载技术(DL)的优点,给出了一种基于对角加载的最小二乘恒模算法。仿真结果表明该算法对阵列流形失配具有较强的鲁棒性,并在低信噪比下具有较好的合成性能。
This paper analyzes the pattern and phase center of element antennas in the horizontal polarization log-periodic antenna array. It also points out that mismatch array manifold is the main reason that the performance of traditional beam-forming algorithms suffer from degradation or even is invalid. The advantage of least square constant modulus algorithm and diagonal loading are combined, and the LSCMA based on diagonal loading is also proposed. Simulation results demonstrate that this algorithm has robustness of mismatch array manifold, and has better beam-forming performance in low SNR.
出处
《信息工程大学学报》
2014年第1期29-33,91,共6页
Journal of Information Engineering University
基金
国家自然科学基金资助项目(61201381)
关键词
对数周期天线
波束形成
对角加载
LSCMA
log-periodic antenna （LPA）
beam-forming
diagonal loading
least square constant modulus algorithm （LSCMA）
