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提出一种利用多个CDMA基站发射的下行链路信号作为外辐射源构成无源雷达定位系统的方案,主要包括自适应杂波相消、距离-多普勒处理、定位参数提取、多站数据融合等功能模块。利用自适应算法进行杂波干扰的消除,对相消后的回波信号进行相干匹配滤波实现动目标检测。最后通过联立多站位置线方程实现了对目标的定位。计算机仿真验证了该方案的可行性,并证明了多个辐射源对定位精度的改善。
A scheme of passive radar positioning system using downlink signals transmitted by multiple CDMA base stations as external radiation sources is proposed, which mainly includes adaptive clutter cancellation, distance-Doppler processing, location parameter extraction, multi-station data Fusion and other functional modules. The adaptive algorithm is used to eliminate the clutter interference and the coherent matched filtering is performed on the canceled echo signals to achieve the moving target detection. Finally, through the simultaneous multi-station location line equation to achieve the goal of positioning. Computer simulation verifies the feasibility of the scheme and proves the improvement of the positioning accuracy of multiple radiation sources.