稀疏阵时分多相位中心孔径综合及其应用

The Application of Thinned Array Time Division Multiple Phase Center Synthesis

为了降低机载三维成像雷达系统的复杂度,该文研究了基于稀疏阵三维成像雷达系统中的重要问题。提出了稀疏阵时分多相位中心孔径综合方法,通过运动补偿,该方法使综合后的相位中心数量和分布情况和满阵天线的相同,从而避免了稀疏阵旁瓣较高的问题;利用模拟退火算法对阵列进行了优化,以使实际使用的阵元最少;由于交轨阵列尺寸远小于场景宽度,系统采用了子孔径三维成像算法。实例分析和仿真结果表明了该方法的有效性。

The three-dimensional imaging radar system based on thinned array is investigated to reduce the system complexity. The multiple phase center aperture synthesis method in time division mode is proposed to eliminate the high side lobes of thinned array. Combine with motion compensation, the synthesized phase center both in quantity and distribution are same as the full array. Using simulated annealing algorithm to optimize the location of antennas, so as to minimize the number of antennas used. For the array length of cross-track is far small than the scene width, the sub-aperture three-dimension imaging method is adopted. The simulation results denote the validity of the method proposed in the paper.