陣列通道幅相不一致性嚴(yán)重影響測(cè)向性能。基于輔助源的相關(guān)校正理論，研究了通過在天線饋電口輸入輔助信號(hào)，再對(duì)信號(hào)求相關(guān)來實(shí)現(xiàn)對(duì)陣列通道不一致性的校正；并分析了基于多基線數(shù)字干涉儀體制的測(cè)向原理，利用五元圓形天線陣列估計(jì)出了地面目標(biāo)的到達(dá)角。此外，還討論了所有算法的DSP實(shí)現(xiàn)，計(jì)算機(jī)模擬證實(shí)了方法的有效性。
關(guān) 鍵 詞 陣列通道校正; 相關(guān); 數(shù)字干涉儀; DSP實(shí)現(xiàn)

Abstract The performance of direction-of-arrival (DOA) estimation algorithms is seriously degenerated when there are errors in array manifold. A correlative based technique, which estimates and calibrates the circle array antenna channel uncertainty used an auxiliary source, is given in this paper. Moreover, the high-accuracy DOA estimation algorithm using digital interferometer and all these algorithms’ DSP implementations are also studied. The efficiency of the method is confirmed by computer simulation.
Key words array channel calibration; correlation; digital interferometer; DSP implementation