CAJ | 학술논문

传统均匀圆阵波达方向（direction of arrival，DOA）估计算法要求天线数目多于目标数量，易受阵列的通道不一致性影响。针对此问题，引入阵列基线旋转这一思想对多目标进行测向。通过旋转两天线阵列基线，并以固定的时间延迟对阵元的接收数据进行采样，相当于利用有限的两个阵元对目标进行多位置观测，增加了阵元的利用率，提高了 DOA 估计的测向精度。计算机仿真实验表明，该算法采用两阵元就可以实现多目标测向，其测向性能与基于均匀5元圆阵的传统多重信号分类算法相当，具有对多通道间相位不一致鲁棒性强的优点。
전통균균원진파체방향（direction of arrival，DOA）고계산법요구천선수목다우목표수량，역수진렬적통도불일치성영향。침대차문제，인입진렬기선선전저일사상대다목표진행측향。통과선전량천선진렬기선，병이고정적시간연지대진원적접수수거진행채양，상당우이용유한적량개진원대목표진행다위치관측，증가료진원적이용솔，제고료 DOA 고계적측향정도。계산궤방진실험표명，해산법채용량진원취가이실현다목표측향，기측향성능여기우균균5원원진적전통다중신호분류산법상당，구유대다통도간상위불일치로봉성강적우점。
The direction detection performance of the traditional direction of arrival(DOA)estimation algo-rithm based on a uniform circular array is limited to the aperture of array and requires more antennas than tar-gets.In order to solve this problem,a new algorithm which uses array basic-line rotation for multi targets esti-mation is proposed.Received data of the array unit are sampled by rotating the basic-line of two antenna array units and using fixed time delay.The utilization rate of the array unit is increased and the DOA estimation accu-racy is improved by using two array units to achieve multi position observation.Computer simulation shows that this algorithm can achieve multi-targets direction by using two array units.Its direction detection performance is equal to that of the traditional multiple signal classfication (MUSIC)based on the uniform five circular arrays, which has advantages of good robustness on multi-channel phase inconsistence.