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基于四阶累积量Root-Music的近场信源二维参数估计
引用本文:石宇,王波,王树勋.基于四阶累积量Root-Music的近场信源二维参数估计[J].吉林大学学报(信息科学版),2007,25(5):465-470.
作者姓名:石宇  王波  王树勋
作者单位:1. 吉林大学,通信工程学院,长春,130025;空军航空大学,航空电子工程系,长春,130022
2. 吉林大学,通信工程学院,长春,130025
摘    要:为了对近场信源的距离参数和方向角参数同时进行有效估计,降低算法的计算量,提出了一种基于四阶累积量的Root-Music算法及相应的参数配对方法。该方法无需进行谱峰搜索运算,利用相应的配对程序能够直接得到近场信源的参数值,降低了运算复杂度。仿真实验表明,在估计两个信源参数时,信噪比为0时就能正确分辨方向角和距离参数,信噪比由-5 dB变化到15 dB时,估计参数的均方误差呈下降趋势。

关 键 词:DOA估计  近场信源定位  四阶累积量  方向角估计  距离估计
文章编号:1671-5896(2007)05-0465-06
收稿时间:2007-04-10

Algorithm for 2-D Near-Field Sources Parameter Estimate Based on Fourth-Order Cumulant Root-Music
SHI Yu,WANG Bo,WANG Shu-xun.Algorithm for 2-D Near-Field Sources Parameter Estimate Based on Fourth-Order Cumulant Root-Music[J].Journal of Jilin University:Information Sci Ed,2007,25(5):465-470.
Authors:SHI Yu  WANG Bo  WANG Shu-xun
Institution:1. College of Communication Engineering, Jilin University, Changchtm 130025, China; 2. Department of Aerial Electronic Engineering, Aviation University of Aifforce, Changchun 130022, China
Abstract:In order to estimate the range and azimuth of near-field sources and decrease computational complexity of the algorithm,a Root-Music method and its associational parameters pairing program are proposed based on fourth-order cumulant.The presented method does not need spectral peak searching;the sources parameters can be obtained directly and has the advantage of low computation cost.Some simulation examples indicated that the azimuth angle and the range can be resolved when SNR(Signal Noise Rate) is zero and MSE(Mean Square Error) is downtrend when SNR change from-5 dB to 15 dB.
Keywords:direction of arrival(DOA) estimate  near-field source localization  fourth-order cumulant  azimuth estimate  range estimate
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