摘要
GPS空时联合(STAP)抗干扰技术是基于自适应波束形成的信号处理方法,通过干扰置零,能够对抗高功率的宽带和窄带干扰。理想的算法认为各个阵列天线之间互不影响,然而实际应用时,各个天线之间会产生互耦,严重影响系统性能。针对此,对自适应天线阵列及其互耦进行了建模,并采用秩损法进行互耦校正,最后将校正结果与分离迭代互耦校正算法作了对比。仿真结果表明,秩损法互耦校正不仅能够有效补偿系统因天线互耦损失的性能,而且在较高输入干噪比下其性能优于分离迭代算法。
GPS space-time adaptive processing （STAP） is a joint anti-interference technology that can suppress high-power broadband and narrowband interferences with null interference. The ideal STAP algorithms assume that all array antennas are independent. However in practical applications, mutual coupling could be produced which affects system performances seriously. Firstly the model of adaptive antenna arrays with mutual coupling is derived. Then by using the loss rank method, the mutual cou- pling is calibrated. Finally, the calibration results Simulation results show that the loss rank of mutual are compared with separated iterative algorithm. coupling calibration method can not only compen- sate the system performances losses effectively, but also have better performances than separated iterarive algorithm in case of higher input interferer to noise power ratio.
出处
《电子信息对抗技术》
2013年第1期42-46,共5页
Electronic Information Warfare Technology
关键词
GPS
空时联合
秩损
互耦校正
GPS
STAP
loss rank
mutual coupling calibration
