采用拟Newton法实现DOA及功率联合估计  

Power and DOA Estimation with Newton-Like Method

作　　者：何子远[1] 庞晓凤[1] 赵志钦[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子科技大学学报》2010年第2期173-175,181,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(60771042)

摘　　要：为了增加移动通信的容量和链接质量,需要准确地知道到达波的方向(DOA)和功率。该文提出了多维非线性目标函数,用来波DOA和功率作优化变量,并采用拟Newton法中常用的Davidson-Fletcher-Powell(DFP)算法进行优化;将优化结果和轮换投影(AP)算法进行比较。仿真表明,当入射信号在空间相隔较远时,该结果和AP算法精度相当,当入射信号在空间接近时,该结果优于AP算法。To increase the capacity and link performance of mobile communications, it is important to accurately estimate the powers and directions of arrival （DOA） of sources. A multi-dimension nonlinear cost function is proposed for this purpose, where the DOAs and powers of sources are optimization parameters. The optimal results are obtained with the Davidson-Fletcher-Powell （DFP） algorithm and are compared with the results of alternating projection （AP） algorithm. The simulation results show that DFP has the accuracy in accordance with AP when sources are away from each other, but higher than AP when sources are near.

关 键 词：DFP DOA估计 拟NEWTON法 功率估计 

分 类 号：TN124.2[电子电信—物理电子学]