摘要
宽带阵列采用自适应宽带波束形成来抑制空间宽带干扰,提高信干噪比SINR。但滤波器相频响应误差的存在会对自适应宽带波束形成的性能造成影响。以宽带信号和滤波器相频响应误差模型为基础、以自适应频域宽带波束形成算法为例,分析了误差对自相关矩阵的秩以及SINR性能的影响。实验结果表明:滤波器相频响应误差会使自相关矩阵的秩增加、SINR性能下降。
Broadband array adopts adaptive broadband beamforming to reject the spatial broadband interference and improve the SINR. However, the filter phase-frequency response errors will deteriorate the performance of adaptive broadband beamforming. Based on the model of the broadband signal and the filter errors, the influence of errors on adaptive frequency domain broadband beamforming is analyzed. Simulation results show that due to the errors the rank of the covariance matrix will increase and the SINR performance will descend.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第9期1641-1644,共4页
Systems Engineering and Electronics
关键词
宽带阵列
宽带波束形成
相频响应误差
broadband array
broadband beamforming
phase-frequency error
