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基于哈达玛积扩展子空间的到达时间和波达方向联合估计

巴斌 刘国春 李韬 林禹丞 王瑜

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基于哈达玛积扩展子空间的到达时间和波达方向联合估计

巴斌, 刘国春, 李韬, 林禹丞, 王瑜

Joint for time of arrival and direction of arrival estimation algorithm based on the subspace of extended hadamard product

Ba Bin, Liu Guo-Chun, Li Tao, Lin Yu-Cheng, Wang Yu
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  • 在窄带阵列天线正交频分复用系统的到达时间和波达方向联合估计中, 针对阵元数目较少时波达方向估计精度不高, 特别是多径数目大于阵元数目导致的波达方向无法估计问题, 提出一种基于哈达玛积扩展子空间的到达时间和波达方向联合估计算法. 该算法首先利用各阵元上的频域信道估计构成扩展信道频域响应矢量, 然后计算扩展信道频域响应矢量自相关矩阵, 并进行特征值分解得到哈达玛积扩展噪声子空间, 最后构造伪谱函数并进行二维谱峰搜索, 从而实现到达时间和波达方向的联合估计. 仿真结果表明, 与现有算法相比, 在复杂度没有大幅提高的前提下, 该算法的估计结果均方根误差更加接近克拉美罗界, 且到达时间和波达方向估计能够自动配对, 在多径数目大于阵元数目时依然适用.
    In the joint estimation for time of arrival (TOA) and direction of arrival (DOA) in the narrow-band orthogonal frequency division multiplexing (OFDM) system with antenna arrays, the estimation accuracy is not high in the situation of few numbers of arrays. Especially, DOA cannot be estimated if the number of multiple paths is more than that of the arrays. For these problems, a joint estimation algorithm for TOA and DOA based on the subspace of the extended hadamard product is proposed. First of all, the algorithm constructs an extended channel response in frequency domain via channel estimation for each array in the frequency domain. Then, auto-correlation matrix of extended channel response in the frequency domain is estimated by sampling many times. This estimation method of channel response in the frequency domain can use the fast Fourier transform algorithm. And the hadamard product in the extended noise subspace is obtained by eigenvalue decomposition. Finally, the pseudo-spectral function is constructed and used to search for spectrum peaks, so as to realize the joint estimation of TOA and DOA. The proposed algorithm requires no parameter paring but needs a two-dimensional searching. Monte Carlo algorithm can be used to reduce computational complexity. Simulation results show that the root mean square error of the joint TOA and DOA estimation which can be matched automatically is closer to the Cramer-Rao bound than that using present algorithms. And the proposed algorithm can be still applied when the number of multiple paths is more than number of arrays.
    • 基金项目: 国家高技术研究发展计划(863计划)(批准号: 2012AA01A502, 2012AA01A505)资助的课题.
    • Funds: Project supported by the National High Technology Research and Development Program of China (Grant Nos. 2012AA01A502, 2012AA01A505).
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    Wang Y L, Ma S L, Liang G L, Fan Z 2014 Acta Phys. Sin. 63 044302 (in Chinese) [王逸林, 马世龙, 梁国龙, 范展 2014 物理学报 63 044302]

    [2]

    Cai H, Deng H C, Wang Y F, Cai H Z, Liu Y T 2006 Physics 350 (in Chinese) [蔡慧, 邓红超, 王永丰, 蔡惠智, 刘云涛 2006 物理 350]

    [3]

    Ren H P, Li W C, Liu D 2010 Chin. Phys. B 19 030511

    [4]

    Luo B W, Dong J J, Yu Y, Yang T, Zhang X L 2013 Chin. Phys. B 22 023201

    [5]

    Ni H 2010 M. S. Dissertation (Xian: Xidian University) (in Chinese) [倪浩2010博士学位论文(西安: 西电电子科技大学)]

    [6]

    Li J, Pei L, Cao M Y, Yu D Y 2006 Chinese Journal of Radio Science 21 771 (in Chinese) [李晶, 裴亮, 曹茂永, 郁道银 2006 电波科学学报 21 771]

    [7]

    Li X, Ma X, Yan S, Hou C 2012 IET Radar Sonar & Navigation 6 781

    [8]

    Jiang H, Cao F C, Ding R 2008 Int Conf Circuits and Systems for Communications (Shanghai: IEEE) p535

    [9]

    Wang F Q, Zhang X F, Wang F 2014 Journal on Communications 35 137 (in Chinese) [王方秋, 张小飞, 汪飞 2014 通信学报 35 137]

    [10]

    Oh D, Kim S, Yoon S H, Chong J W 2013 IEEE Trans Wirel Commun 12 3130

    [11]

    Li J, Zhao Y J, Li D H 2014 Acta Phys. Sin. 63 130701 (in Chinese) [李晶, 赵拥军, 李冬海 2014 物理学报 63 130701]

    [12]

    Ding R, Qian Z H, Wang X 2014 Journal of Electronics & Information Technology 32 313 (in Chinese) [丁锐, 钱志鸿, 王雪 2014 电子与信息学报 32 313]

    [13]

    Cao F C, Li M 2010 IEEE Int. Conf. Wireless Communications Networking and Mobile Computing (Chengdu: IEEE) p1

    [14]

    Li X, Pahlavan K 2004 IEEE Trans. Wirel Commun 3 224

    [15]

    Schmidt R O 1986 IEEE Trans. on Antennas and Propagat. 34 276

    [16]

    Vanderveen M C, Van der Veen A J, Paulraj A 1998 IEEE Trans Signal Process 46 682

    [17]

    Stoica P, Arye N 1989 IEEE Trans Acoust, Speech Signal Process 37 720

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出版历程
  • 收稿日期:  2014-09-07
  • 修回日期:  2014-11-02
  • 刊出日期:  2015-04-05

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