基于码分复用的相控阵雷达内定标技术

Internal Calibration Method of Active Phased Array Based on CDMA

相控阵天线各通道的不一致性会影响天线的性能,进而影响雷达的正常工作。为了保障相控阵雷达系统工作的稳定性,需要有对雷达进行定标的系统。提出一种能够准确、实时地对阵列进行定标的方法——基于码分复用的内定标方法,选择伪随机序列(m序列)和Walsh序列进行相位编码,对基于两种序列的内定标进行分析,并通过仿真实验验证了方法的有效性。

The performance of the antenna array is affected by the mismatch among antenna channels.To improve the stability of the antenna array,the mismatch must be adjusted by the calibration system.In this paper,an internal calibration technique of phased array based on CDMA is proposed,which can provide accurate and real-time calibration.Two binary sequences which are m-sequence and Walsh-sequence are investigated.Both of them are applied in the simulation,and the results show that the proposed method is effective.