相控阵雷达降维四通道和差波束测角

针对大型阵列的子阵划分，权值优化和单脉冲测角阵元数多，两级联合权值逼近以及对于主瓣内偏离波束中心超过3 dB的目标，会出现较大的测角偏差的问题，提出了一种基于降维相控阵的增加双差通道的四通道单脉冲测角方法.基于粒子群优化算法联合权值优化算法，在保证相控阵波束关键指标的前提下，极大减少通道数，降低工程实现难度；四通道单脉冲测角方法提高了对于主瓣内偏离波束中心3 dB以上目标的测角精度，扩宽了精确测角范围，降低了测角范围的损失.仿真实验证明了所提算法的有效性和可行性. 

Dimensionality Reduction of Phased Array and 4-Channel Monopulse Angle Measurement of Sum and Difference Beams

To overcome the larger deflection of angle measurement, existing in subarray division of large arrays, weight optimization and the monopulse angle estimation, the large number of arrays, the weight approach algorithm and the large bias of the target departing more than 3 dB from the antenna, a 4-channel monopulse angle measurement method was proposed based on dimensionality reduction of phased array with an additional delt-delt channel. Combining the particle swarm optimization algorithms and weight optimization algorithm, the 4-channel monopulse angle measurement method was designed to greatly decrease the number of the channel, reduce project implementation difficulty and keep fine beam shape, to improve the monopulse angle estimation and the angle measurement accuracy of the beam departing more than 3 dB from the antenna, and to improve the efficiency of angle estimation and reduce the loss of angle measuring range. The simulation results and performance analysis show the effectiveness and feasibility of the presented algorithm.