摘要:雷达接收到的回波信息中通常包含目标、干扰和噪声信号，干扰信号通常要比目标信号强很多，会严重影响雷达的正常工作。本文的主要研究目的是用旁瓣相消的方法对进入雷达系统的干扰信号进行抑制，使其对雷达系统的影响降到最低。

本文用开环旁瓣相消算法和广义旁瓣相消算法对干扰信号进行抑制。在开环算法中以最小均方误差为准则，用主辅通道间干扰相关性计算辅助通道最优权系数，对主通道内干扰信号消除并同时保留目标信号。在广义旁瓣相消器算法中以线性约束最小准则计算出最优权系数，构建一个阻塞矩阵将自适应部分的目标信号阻塞掉，使其干扰信号与非自适应部分的干扰信号相消，留下非自适应部分的期望信号输出。仿真结果表明合成天线在干扰方位形成零陷，干噪比、阵元数、入射角度和阵元间距对旁瓣相消性能有一定的影响。

关键词：相控阵雷达；最优权值；自适应旁瓣相消

Abstract:Echo information that radar received usually contains targets, interference and noise signals. The interference signal is usually much stronger than the target signal, which will seriously affect the normal operation of radar. The main purpose of this paper is to enter the interference signal from the radar to suppress the sidelobe canceller method and make the influence on the radar system be a minimum.

In this paper, the interference signal is suppressed by SMI algorithm and GSC algorithm.In the SMI algorithm, the minimum channel error is used as the criterion, and the auxiliary channel optimal weight coefficient is calculated by the correlation between the main and auxiliary channels. The interference signal in the main channel is eliminated and the target signal is retained at the same time.In the GSC algorithm, the optimal weight coefficient is calculated by linear constraint minimum criterion, and a blocking matrix is constructed to block the target signal of the adaptive part, so that the interference signal and the non-adaptive part of the interference signal are canceled, leaving the non-adaptive Part of the desired signal output.. The simulation results show that the position of the combined antenna in the interference azimuth, the dry noise ratio,array element,incident angle and element spacing have a certain influence on the sidelobe cancellation performance.

Keywords: Phased array radar；Optimal Weights；Adaptive sidelobe cancellation

目录

第一章绪论 1

1.1本课题研究的背景及意义 1

1.2自适应旁瓣相消技术的国内外发展状况 1

1.3本文的主要工作 3

第二章相控阵雷达 4

2.1天线波束的扫描方法 4

2.2相位扫描法 4

2.3相控阵雷达的特点 6

2.4常规波束形成 7

2.5线性约束最小准则 8

2.6本章小结 11

第三章自适应旁瓣相消理论 12

3.1自适应旁瓣相消原理 12

3.2旁瓣相消算法 13

3.2.1开环自适应旁瓣相消 14

3.2.2广义旁瓣相消器（GSC）算法 15

3.3本章小结 16

第四章自适应旁瓣相消性能仿真 17