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无线定位中基于旋转不变PM的时延估计
Time delay estimation based on rotation-invariance PM in wireless positioning
投稿时间:2018-03-22  修订日期:2018-04-16
中文关键词:正交频分复用  旋转不变  传播算子  时延估计
英文关键词:Orthogonal Frequency Division Multiplexing  Estimating Signal Parameter via Rotational Invariance Techniques  Propagator Method  time delay estimation
基金项目:国家自然科学基金资助项目(61401513);国家科技重大专项资助项目(2013ZX03006003-006)
作者单位
李海文 Institute of Data and Target EngineeringInformation Engineering UniversityZhengzhou Henan 450001China 
陈 松 Institute of Data and Target EngineeringInformation Engineering UniversityZhengzhou Henan 450001China 
张 龙 Institute of Data and Target EngineeringInformation Engineering UniversityZhengzhou Henan 450001China 
郑娜娥 Institute of Data and Target EngineeringInformation Engineering UniversityZhengzhou Henan 450001China 
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中文摘要:
      定位参数的快速估计是无线定位系统的关键环节。针对超分辨时延估计算法计算复杂度较高这一问题,提出一种基于旋转不变传播算子(PM)的时延估计算法。该算法首先对正交频分复用(OFDM)频域接收信号进行建模,然后计算协方差矩阵,再根据子载波流行矩阵的范德蒙矩阵属性,采用旋转不变PM算法实现时延参数的闭式解,从而既无须特征值分解又避免了伪谱峰搜索,计算速度快。理论分析和仿真结果表明,该算法在计算量大幅度下降的同时,参数估计性能接近于基于旋转不变技术(ESPRIT)估计信号参数算法,具有一定的可行性和有效性。
英文摘要:
      Fast estimation of location parameters is the key for the wireless positioning system, but super-resolution time delay estimation algorithms commonly have high computational complexity. Aiming at solving this problem, a time delay estimation based on rotation-invariance Propagator Method(PM) is proposed in Orthogonal Frequency Division Multiplexing(OFDM) system. Firstly, the received signal in OFDM frequency domain is modeled, and then the covariance matrix is calculated. Finally, according to the Vandermonde matrix attribute of subcarriers steering matrix, the closed-form solution of time delay parameter is accomplished by rotation-invariance PM algorithm, which not only does not need eigenvalue decomposition but also avoids the pseudo spectral peak search, and the calculation speed is fast. Theoretical analysis and simulation results show that the performance of the proposed algorithm is close to that of the Estimating Signal Parameter via Rotational Invariance Techniques(ESPRIT) algorithm with a significant cut in the computational complexity, and the algorithm has good feasibility and effectiveness.
引用本文:李海文,陈 松,张 龙,郑娜娥.无线定位中基于旋转不变PM的时延估计[J].太赫兹科学与电子信息学报,2019,17(3):418~423
DOI:10.11805/TKYDA201903.0418
学科分类代码:
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