摘要
时间反转被动定位技术是一种可以在无需目标合作的条件下,实现被动相干源能量时空自适应聚焦,确定浅海被动目标位置的信号处理技术。提出了垂直阵时反被动定位(APTRM)技术的具体实现方法,为提高算法的处理增益、定位精度和定位稳健性,对算法进行了改进。进行了水池实验和海试,试验结果验证了所提算法的正确性和实用性。研究结果表明:有各向同性干扰时,利用各阵元互相关综合的实现方法具有更强的噪声抑制能力;存在环境失配时,改进算法可有效减少聚焦伪峰,明显确定目标的真实位置,具有较高的稳健性和抗环境干扰能力。
The passive localization technology based on the time-reversal mirror is a signal processing technology to implement spatial and temporal self-adaptation focusing for coherent sources and passive target location in the shallow sea,which can also position non-cooperative target.Four implementations for array passive time reversal mirror（APTRM） localization technology are proposed and the improved algorithms used to increase the processing gain,precision and robust of location are studied.The pool experiments and sea trials are carried out.The results validate the feasibility and practicability of this technology and show that the environment noise can be depressed effectively by using synthetic cross-correlation method,and the pseudo focus coursed by environment mismatch can be cut down by the using improved algorithms.The results also prove that the improved implementations for APTRM have good robustness and better anti-isotropic interfere ability.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2011年第3期359-364,共6页
Acta Armamentarii
关键词
声学
虚拟时间反转镜
阵列信号处理
稳健算法
acoustics
virtual time-reversal mirror
array signal processing
robust algorithm
