基于时差校正的长基线宽带测向算法

摘要

研究长基线宽带测向问题,由于传统测向算法受到相位解模糊条件的限制,天线孔径长度设置较短,因此无法进一步提高测向精度.基于宽带信号时延估计具有高精度的特点,提出了基于时差校正的宽带测向及解模糊算法,并且对其性能和使用条件进行详细的分析.由于基线长度不受传统方法的限制,因此在长基线条件下,具有非常高的测向精度.仿真结果证实所提算法只需较少的天线阵元,却具有很高的测向精度.%The long baseline direction finding algorithm of wideband signal is discussed. The traditional di-rection finding algorithm is limited by the requirement of unwrapping phase ambiguity, so antenna apertures are short and the precision cannot be improved. Based on the high precision of wideband signal time-delay estima-tion, direction finding algorithm of wideband signal based on time-delay correction and unwrapping phase ambi-guity algorithm are presented. The performances and using conditions are analyzed in detail. As the baseline length is not restricted by the traditional methods, the algorithm can achieve very high precision on the condition of long baseline. The simulation results show that the algorithm can achieve very high precision of direction finding by using less antenna arrays.