校正天波雷达电离层相位污染的相位投影法  

Phase projection algorithm of correcting ionosphere phase perturbation for OTHR

作　　者：于文启 陈建文[1] 罗欢[1] 黄文鹂[1] 

机构地区：[1]空军预警学院,武汉430019

出　　处：《空军预警学院学报》2015年第3期157-162,共6页Journal of Air Force Early Warning Academy

基　　金：国家自然科学基金资助项目(61471391)

摘　　要：鉴于时变电离层的相位污染使天波超视距雷达回波谱展宽,影响舰船等低速目标的检测,从高阶瞬时矩(HIM)的角度出发,提出一种校正电离层相位污染的相位投影法(PPA).该方法利用投影矩阵可以直接将回波信号的相位投影到污染相位,避免了累加的相位误差和多项式模型阶数的选择.仿真结果验证了该方法的有效性.与改进的相位梯度法(IPGA)和多项式相位(PPS)法相比,该方法对不同形式相位污染具有较好的普适性,并且鲁棒性好、运算量小,更适合于工程实现.Considering that the time-varying ionosphere phase perturbation results in widening the echo spectrum and affects the detection of ships and warships and other low speed targets, this paper proposes a phase projection algorithm（PPA） of correcting ionosphere phase perturbation, from the perspective of higher-order instantaneous matrix. In this scheme, the echo＇s phase can be directly projected to the perturbed phase, by using the projection matrix, which averts from the accumulated phase error and selection of the polynomial model order.Simulation results verify the effectiveness of this proposed algorithm. Compared with the improved phase gradient algorithm（IPGA） and method of polynomial phase signal（PPS）, this algorithm is of better universality for various forms of phase perturbation, good robustness and small computation, thus more available for engineering implementation.

关 键 词：天波超视距雷达 电离层相位污染 相位投影法 多项式相位信号 

分 类 号：TN958.93[电子电信—信号与信息处理]