CAJ | 학술논문

由于多径信号的存在，米波雷达对低仰角目标的估计性能受到严重影响。针对这一问题，该文首先介绍了广义MUSIC算法及两种改进算法，理论分析表明这些算法有效性的实质是对基本谱峰搜索方式进行加权，抑制了小角度产生的大谱值。在此基础上，该文提出了基于广义MUSIC算法的低仰角估计方法模型，并给出一种新的低仰角估计方法。该方法利用了更加合理的权值，与已有方法相比，估计的成功概率更高，性能更优。仿真试验验证了该方法及模型的有效性和正确性。
유우다경신호적존재，미파뢰체대저앙각목표적고계성능수도엄중영향。침대저일문제，해문수선개소료엄의MUSIC산법급량충개진산법，이론분석표명저사산법유효성적실질시대기본보봉수색방식진행가권，억제료소각도산생적대보치。재차기출상，해문제출료기우엄의MUSIC산법적저앙각고계방법모형，병급출일충신적저앙각고계방법。해방법이용료경가합리적권치，여이유방법상비，고계적성공개솔경고，성능경우。방진시험험증료해방법급모형적유효성화정학성。
Radar low-elevation estimation performance in the VHF band is severely influenced in the presence of multipath. To deal with this problem, this study first analyzes general MUSIC (MUltiple SIgnal Classification) and other algorithms, pointing out that the essential effectiveness of these algorithms is a weighting of the basic spectrum searching formula, which inhibits large spectrum values produced by a small angle. On this basis, this paper subsequently presents an elevation-estimating model via a general MUSIC algorithm and a new low-elevation angle estimation method, which utilizes a proper weight. Compared with existing methods, the new method has a higher probability of success and better performance. Simulation results verify the validity and correctness of this method and model.