摘要
针对一个波束宽度内存在多目标的情况,提出了一种基于时空级联处理的用单天线、单接收通道实现目标角度和多普勒频率联合超分辨估计的方法。与阵列天线利用目标反射波的相位关系不同,单天线、单通道方法是根据天线扫描时,对回波脉冲的增益变化而构造导向矢量阵的,此时若直接采用常规空间谱估计方法,则实现的是信号多普勒频率的超分辨,角度估计效果较差。时空级联处理方法可充分利用信号的时域结构信息,明显提高角度的估计性能,并且无需高维搜索,计算量小。计算机仿真结果证明了新算法的有效性和正确性。
Aiming at the problem of multiple targets present in the mainlobe of a rotating antenna, a method based on temporal-spaial sequential processing to superresolve target position and Doppler frequencies is proposed, which uses only one receiver channel. Compared with using on the phase relation in array antenna, this single antenna-channel method employs the fact that the mechanical scanning antenna impresses an amplitude modulation on the signals backscattered by the targets, but it merely superresolves Doppler frequencies. The temporal-spatial processing method which takes full advantage of temporal information could obviously improve estimation performance, at the same time, it avoids computation complexity. Simulation results demonstrate the effectiveness and efficiency of our proposed methods.
出处
《现代雷达》
CSCD
北大核心
2010年第5期56-59,共4页
Modern Radar
基金
国家自然科学基金(60601016)
军队重点科研项目基金资助项目
关键词
扫描体制雷达
二维参数估计
幅度调制
时空级联
scanning antenna
2-D parameter estimation
amplitude modulation
temporal-spatial sequential
