摘要
柱面共形阵由于其载体曲率的影响,导致在利用经典MUSIC(Multiple Signal Classifica-tion)算法进行DOA(Direction-of-Arrival)估计时,导向矢量与噪声子空间不正交,算法性能严重下降甚至失效。在考虑载体遮挡效应的同时,结合阵元的方向性,通过对导向矢量进行重构,解决了导向矢量与噪声子空间不正交这一问题。对比子阵分割MUSIC算法,进行了MonteCarlo仿真验证,分析了有向阵元MUSIC算法的估计性能。最后以多层圆柱阵为例对4个从不同方向入射的信源进行了DOA估计仿真验证。仿真结果表明:该方法具有分辨力高,估计精度高的优点,证明了该方法的有效性和高估计性能。
Because of the influence of the curvature of cylindrical conformal array, the performance will be deterio- rated and even become invalid when MUSIC algorithm is used to estimate signal＇s DOA. The problem that the steer- ing vector and the noise snbspace are not orthogonal is efficiently solved by reconstructing the steering vector with directional of array element in consideration of the carrier＇s block. By contrasting with sub - array divided tech- nique, Monte Carlo simulation and verification are done, and the estimation performance of MUSIC algorithm is an- alyzed. Finally, by taking the multi - layer column for example, the DOA estimation for four sources from different orientations are simulated and verified. The simulation results show that the method has the advantages of high dif- ferentiation and precision, also demonstrate that the proposed scheme is efficient and of high estimation perform- ance.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2012年第5期66-70,共5页
Journal of Air Force Engineering University(Natural Science Edition)
基金
陕西省电子信息系统综合集成重点实验室基金资助项目(20117Y03)
