时间调制阵列的方向调制信号综合算法研究

On Directional Modulation Signal Synthesis Algorithm of Time Modulated Array

针对时间调制稀疏阵列天线方向调制信号综合问题提出了一种分步迭代凸优化算法。通过对阵元开启时长和开启时刻的分析,将方向图的上下界约束转化成凸问题。通过对中心频带和边带方向图的分步优化,使期望辐射方向上只有中心频带辐射,边带信号形成零陷。稀疏线阵的仿真结果验证了所提算法的稳定性和高效性,达到了方向调制信号综合的目的。

A Stepwise Iterative Convex optimization(SI-CVX)algorithm is proposed for directional modulation signal synthesis of time modulated sparse antenna array.By analyzing the switch-on duration time and the switch-on moment of the array element the upper and non-convex lower bounds of the pattern are converted to convex problems.By optimizing the main band pattern and sideband pattern step by step only the main band is remained in the desired radiation direction and the sideband signal is null.The efficiency and stability of the stepwise iterative convex optimization algorithm is verified by the simulation of time modulated sparse linear array and the purpose of directional modulation signal synthesis is achieved.