摘要
水下目标辐射噪声含有高强度稳定线谱,可用来提高拖曳线列阵检测性能,但在强干扰背景下,拖曳线列阵对水下未知线谱目标检测性能下降。针对该问题,设计了一种空频联合处理方法。该方法在空域上利用具有良好宽容性的逆波束形成算法对强干扰进行抑制,在频域上利用方位加权对未知线谱进行检测,空频联合处理,提高了拖曳线列阵对未知线谱的检测性能。通过程序仿真表明,该空频联合处理方法提高了强干扰背景下,拖曳线列阵对未知线谱目标的检测能力。
The underwater target usually contains line spectrum with high strength and sustained stability that can be used to improve the detection performance of the towed array. But in the background of strong interference, the detection performance of the towed array for the unknown line spectrum will decline. Aiming at this problem, the space - frequency combined processing method is proposed. This method uses the inverse beamforming with good robust in the pace domain and uses the target detection method based on weighted position in the frequency domain. Through the space - frequency combined processing, this method improves the detection performance of the towed array. The simulation and trial data processing results have proven the space - frequency combined processing method im- prove the detection performance of the towed array in the background of the strong interference.
出处
《网络新媒体技术》
2015年第5期51-56,共6页
Network New Media Technology
基金
国家自然科学基金(61372180)
关键词
拖曳线列阵
线谱检测
干扰抑制
空频联合处理
the towed array, line detection, interference suppression, space -frequency combined processing
