一种新的二维DOA估计的配对算法

ESPRIT的改进算法--PRO-ESPRIT和TLS-PRO-ESPRIT是一种一维的参量估计方法.要想估计二维DOA(方向角和俯仰角),并实现配对,首先要建立有效的平面阵列,然后利用相应算法进行辐射源的估计和配对.利用广义交叉阵列和PRO-ESPRIT、TLS-PRO-ESPRIT算法,提出了一种新的对沿X轴和Y轴分别估计的多辐射源的二维DOA的方向余弦的配对方法.该方法与利用MUSIC对沿X轴和Y轴分别估计的多辐射源的二维DOA的方向余弦进行配对的方法相比,大大减少了运算量.仿真结果显示利用PRO-ESPRIT和TLS-PRO-ESPRIT方法配对,可以部分进行并行处理,不必进行谱峰搜索,大大节约了运算时间,对实际的工程实时处理很有帮助.

A New Pairing Algorithm for Two-dimension DOA Estimation

PRO-ESPRIT and TLS-PRO-ESPRIT, which are the improved algorithms for ESPRIT, are one-dimension coefficients-estimation methods. To estimate two-dimensions DOA and realize its pairing at the same time, an effective plane matrix will be set up first, then the corresponding algorithms will be applied to reach the estimation and pairing for the radiation source. Within this paper, by the help of generalized inter-arrays, PRO-ESPRIT and TLS-PRO-ESPRIT, a new pairing method is provided, which is based on the estimation of bearing cosines of the two-dimension DOA from multi-radiation sources, in the direction of X axis and Y axis, respectively. Comparison to MUSIC method, it reduces the calculation on a large scale. The simulation shows that partial parallel-processing could be reached and there is no need to do the spectrum-peak searching, by using the pairing methods of PRO-ESPRIT and TLS-PRO-ESPRIT. This will reduce the calculation greatly and do great help in real-time processing for the real projects.