雷达科学与技术
雷達科學與技術
뢰체과학여기술
RADAR SCIENCE AND TECHNOLOGY
2015年
2期
159-163
,共5页
共形阵列%空时处理%DOA 估计%极化状态估计
共形陣列%空時處理%DOA 估計%極化狀態估計
공형진렬%공시처리%DOA 고계%겁화상태고계
conformal array%space-time processing%direction-of-arrival estimation%polarization estimation
共形阵列是一种与载体表面共形的天线阵列。与平面阵列相比,共形阵列具有对载体电磁性能和动力性能影响小等优点,因此受到人们广泛的关注。受载体曲率影响,共形阵列具有多极性。在信号处理时,必须要考虑信号极化的状态。为此,针对共形阵列信号二维 DOA 和极化状态联合估计问题,提出了一种基于空时处理的参数估计算法。该算法通过对极化接收数据时域和空域联合处理构造时空 DOA 矩阵,利用DOA 矩阵方法只需一次特征值分解即可获得信号二维 DOA 和极化状态参数估计。算法对阵列形状要求低,无需谱峰搜索和参数配对,计算量小。最后,以圆台共形阵列为例,通过仿真实验验证了算法的有效性。
共形陣列是一種與載體錶麵共形的天線陣列。與平麵陣列相比,共形陣列具有對載體電磁性能和動力性能影響小等優點,因此受到人們廣汎的關註。受載體麯率影響,共形陣列具有多極性。在信號處理時,必鬚要攷慮信號極化的狀態。為此,針對共形陣列信號二維 DOA 和極化狀態聯閤估計問題,提齣瞭一種基于空時處理的參數估計算法。該算法通過對極化接收數據時域和空域聯閤處理構造時空 DOA 矩陣,利用DOA 矩陣方法隻需一次特徵值分解即可穫得信號二維 DOA 和極化狀態參數估計。算法對陣列形狀要求低,無需譜峰搜索和參數配對,計算量小。最後,以圓檯共形陣列為例,通過倣真實驗驗證瞭算法的有效性。
공형진렬시일충여재체표면공형적천선진렬。여평면진렬상비,공형진렬구유대재체전자성능화동력성능영향소등우점,인차수도인문엄범적관주。수재체곡솔영향,공형진렬구유다겁성。재신호처리시,필수요고필신호겁화적상태。위차,침대공형진렬신호이유 DOA 화겁화상태연합고계문제,제출료일충기우공시처리적삼수고계산법。해산법통과대겁화접수수거시역화공역연합처리구조시공 DOA 구진,이용DOA 구진방법지수일차특정치분해즉가획득신호이유 DOA 화겁화상태삼수고계。산법대진렬형상요구저,무수보봉수색화삼수배대,계산량소。최후,이원태공형진렬위례,통과방진실험험증료산법적유효성。
Conformal array is a kind of array that has the similar shape as the platform surface.Com-pared with the conventional planar arrays,conformal array has many advantages,e.g.,suitability for differ-ent platforms and non-occupation of internal space and non-affectation of kinetic characteristic.Therefore, conformal array has been widely investigated in different areas.By the influence of the curvature of the carri-er,conformal array has polarization diversity.In signal processing,the state of the signal polarization must be considered.To this end,a joint estimation method of 2D-DOA and polarization is proposed for conformal array.Based on the polarization receiving data,space-time matrixes are constructed by spatial domain sam-pling and time domain sampling.The DOA matrix method is utilized to estimate the parameters in this meth-od.It doesn’t need spectral peak searching and parameter pairing.Simulation results demonstrate the effec-tiveness of the proposed algorithm.