摘要
讨论了无线网络中多径信号角度和时延的联合估计算法,给出了OTST ESPRIT算法·该算法通过使用基于一步特征值分解的OT ESPRIT和OS ESPRIT算法估计多径信号的传播时延和波达方向,有效避免了多次特征值分解,从而降低了TST ESPRIT算法的复杂性·其次给出了多径信号模型联合角度和时延估计的罗克拉美下限,分析了OTST ESPRIT算法的计算复杂性·最后在仿真的基础上对OTST ESPRIT算法的性能进行了讨论·
An OTST-ESPRIT algorithm is proposed after discussing the joint estimation algorithm of direction of arrival (DOA) and delay for multipath signals in wireless network communication environment. delay and DOA are estimated by the OT-ESPRIT algorithm and OS-ESPRIT algorithm in the proposed algorithm, respectively. Only the one-step eigenvalue decomposition (EVD) is needed to estimate delay or DOA, making use of the OT-ESPRIT or OS-ESPRIT algorithm. Multiple EVDs are thus avoided efficiently to lower the complexity of TST-ESPRIT algorithm. Gramer-rao bound of the joint estimation of DOA and delay is then given for the multipath signal model. Computational complexity of the proposed algorithm is analyzed. Some simulations are provided to justify the proposed algorithm.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第7期633-636,共4页
Journal of Northeastern University(Natural Science)
基金
教育部科学技术研究重点项目(02085)
