时延估计与双线阵左右舷分辨

针对双线列阵的左右舷分辨问题，特别是双线阵间距较大时的左右舷分辨问题，文中提出了一种以时延估计为理论基础的左右舷分辨方法，将双线阵的左右舷分辨问题转变成对轴向对称的两路波束信号进行时延估计，然后根据时延值的符号判断出目标所处的左右舷。该方法具有算法简单、对阵形畸变不敏感的优点。经过湖试实验数据分析验证，证明是一种简单、有效、可行的左右舷分辨技术。

Time delay estimation and the twin-line arrays port/starboard discrimination

To be aimed at the twin-line arrays port/starboard discrimination problem, especially when the twin-line gap is quite large, this paper presents a twin-line arrays port/starboard discrimination method based on the theory of time delay estimation. It transfers the problem of twin-line arrays port/starboard discrimination to that of time delay estimation of the two channel beam signals which are rotational symmetric, and then discriminates the port/starboard of the target by the sign of the time delay value. This method has a very simple algorithm and is not sensitive to the aberration of the twin-line arrays shape. Lake experiment proves that it is a simple, effective and practical port/starboard discrimination technology.