宽带相控阵雷达发射波束零点形成方法  

Study of the wideband phased array radar with transmitting null beamforming

作　　者：曹运合[1] 李强[1] 王胜华[2] 张守宏[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,陕西西安710071 [2]航天长征火箭技术有限公司704所,北京100076

出　　处：《西安电子科技大学学报》2006年第3期395-399,共5页Journal of Xidian University

基　　金：国家部委科技自然基金资助项目(51407010101DZ0116)

摘　　要：在发射为线性调频信号的基础上,提出了一种宽带子阵数字发射波束形成新方法.该方法用数字权和时变相位权代替传统宽带子阵延时线方法波束形成中的移相器和时延线,这就避免使用存在量化误差且昂贵的模拟时延单元.此外,子阵内数字权可通过窄带波束零点形成的方法来构造并加宽凹口,最终实现了宽带发射波束零点形成.最后,计算机仿真证明了宽带数字方法能保持发射波形距离高分辨率并且可在干扰方向形成零点.In order to suppress wideband interference and make the pattern null in the direction of interference, a new wideband transmitting beamforming algorithm is presented based on the LFM waveform. The method uses digital weight and frequency- dependent phase weight to replace phase shifters at the element level and analog time delay units at the subarray level respectively, which avoids using analog time delay units that cause quantization style errors and high cost. Moreover, digital weight in subarray can be constructed by the narrowband method and make a wide null, realizing the wideband pattern null finally. Finally, the computer simulations illustrate that the proposed algorithm can keep waveform range resolution and obtain pattern null.

关 键 词：宽带相控阵 数字波束形成 线性调频 

分 类 号：TN958[电子电信—信号与信息处理]