基于时延估计的双线阵左右舷分辨技术研究

The Research on the Twin-line Arrays Port/Starboard Distinguishing Technology Based on the Time Delay Estimation

针对双线列阵左右舷模糊问题,文中提出了一套完整的信号处理方案,将波束形成、检测估计、左右舷分辨、镜象源干扰抵消融为一体:两根线列阵分别对应着左/右舷一侧0°～180°范围进行多波束形成;当检测到目标后,对目标方位进行粗测,将目标所处的呈镜象轴对称左右舷两路波束信号取出,以测相关的方法估算出两路信号的时延,根据时延值的符号,判断出目标所处的左右舷:然后根据镜象源所处的位置,采用不同的方法将镜象源干扰抵消掉,从而完成波束形成、左右舷分辨等全过程。经过仿真实验和湖试实验,证明这是一种有效、可行的左右舷分辨技术。

To be aimed at twin-line arrays port/starboard blur problem, the paper presents a signal processing solution, bringing the forming of the beams, detection and estimation, the distinguish of the port/starboard and the offset for the mirror source noise as a whole: two line-array corresponds to the 0-180 degree of the left/right shipboard, forming the multi-beams; after detecting the target, estimates the target's rough position, picks out the two beams of the left-right shipboard which are symmetric to the mirror axis, use the correlation estimation to calculate the time delay of the signals. According to the sign of the time delay, judge the left-right shipboard of the target; then uses different methods to counteract the mirror source noise with the position of the mirror source, thus forming the multi-beams, distinguish the left-right shipboard and finishing the whole process. After simulation and lake experiment, it is proved to be an effective and practical technology for port/starboard discrimination.