摘要
针对假设的多普勒频率和真实的多普勒频率之间的误差会导致盲波束形成的性能急剧的下降这一事实。首先分析了存在多普勒误差时的最小均方误差准则意义下的盲自适应波束形成的性能,然后提出了一种有效的算法来对抗多普勒误差,该算法是一迭代过程,可以在线估计出真实的多普勒频率。计算机仿真验证了提出算法的有效性。
Blind adaptive beamforming suffers from performance degradation in the presence of mismatch between the actual and presumed Doppler frequency of the desired signal. In this paper, the performance of the algorithm by MMSE （Minimum Mean Square Error） criterion in the presence of mismatch of Doppler frequency is firstly evaluated, then, a novel robust scheme, in which estimated Doppler frequency on-line, is proposed to alleviate the degradation due to Doppler frequency error. Computer simulations show the validity of the proposed method.
出处
《电波科学学报》
EI
CSCD
北大核心
2006年第5期697-700,707,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目(No.60472097)
关键词
盲自适应波束形成
多普勒频率误差
相控阵多普勒雷达
稳健性
blind adaptive beamforming, Doppler frequency error （DFE）, phased array Doppler radar, robustness
