基于参数转移的岸-舰双基地波超视距雷达发射阵幅相扰动估计

摘要

岸-舰双基地波超视距雷达采用岸基阵列发射不同载频的信号进行几乎全向辐射,舰载单根天线接收,接收端利用综合脉冲孔径技术得到等效发射方向图.本文结合该雷达系统特点,利用接收到的直达波信号,提出基于参数转移的幅相扰动估计方法.该方法引入新的未知量,通过参数转移,将由接收站方位误差引起的相位扰动估计误差转移到新的未知量中.论文详细推导了基于参数转移的发射阵幅相扰动估计模型以及幅相扰动估计的克拉-美罗界.计算机仿真表明了所提方法的有效性.%The coast-slrip bistatic surface wave over-the-horizon radar(SWOTHR) uses a coast-located array to transmit signals of different carrier-frequencies and a ship-carried omni-antenna to receive echoes. The energy emitted covers a rather large sector and the equivalent transmit beampattem is formed by adopting the technique of impuslse and aperture synthesis. A method based on parameter transfer for gain and phase perturbations estimation of the transmit array is proposed using the received direct-path wave. In this method,a new unknown variable is introduced and the estimation error induced by the uncertainty of the receiver direction is transferred to the new variable.The signal model and the Cramer-Rao lower Bound for the array perturbation estimation are deduced.The computer simulation shows the effectiveness of the proposed method.