A Two-Stage Approach for the Estimation of Doubly Spread Acoustic Channels
A Two-Stage Approach for the Estimation of Doubly Spread Acoustic Channels
复制标题
双传播声通道估计的两阶段方法
DOI：
10.1109/joe.2014.2307194
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发表时间：
2015
影响因子：
4.1
通讯作者：
Xu, Wen
中科院分区：
文献类型：
--
作者：
Qu, Fengzhong;Nie, Xingyang;Xu, Wen
本文研究了双扩展声信道的估计问题。通过多项式近似参数化每条路径的幅度变化和延迟变化，本文推导了一个适合于单载波块传输的离散时间信道输入输出关系的数学模型。基于该数学模型，将信道估计问题转化为表征信道的低维参数集（幅度、时延、多普勒尺度）的估计问题。然后，一个两阶段的稀疏信道估计技术，估计的延迟和多普勒尺度顺序。与一级联合估计相比，两级估计方法大大减少了正交匹配追踪（OMP）算法搜索的延迟-多普勒尺度网格上的候选数量，即字典大小大幅减少。因此，计算复杂度低得多。此外，两阶段方法在计算机模拟中表现出更高的准确性，并在应用于实验数据时获得更好的检测性能。
In this paper, the estimation of doubly spread acoustic channels is investigated. By parameterizing the amplitude variation and delay variation of each path with polynomial approximation, this paper derives a mathematical model for the discrete-time channel input-output relationship tailored to single-carrier block transmissions. Based on the mathematical model, the channel estimation problem is transformed into estimation of the low-dimensional parameter sets (amplitude, delay, Doppler scale) that characterize the channel. A two-stage sparse channel estimation technique is then developed, which estimates the delay and Doppler scale sequentially. Compared to the one-stage joint estimation, the two-stage estimation approach greatly reduces the number of candidates on the delay-Doppler scale grid searched by the orthogonal matching pursuit (OMP) algorithm, that is, the dictionary size is reduced dramatically. As a result, the computational complexity is much lower. Further, the two-stage approach demonstrated higher levels of accuracy in computer simulations and led to better detection performance when applied to experimental data.
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DOI：
10.1145/2076569.2076571
发表时间：
2011-10
期刊：
Proceedings of the 6th International Workshop on Underwater Networks
影响因子：
--
作者：
A. Song;Joseph Senne;M. Badiey;Kevin B. Smith
通讯作者：
A. Song;Joseph Senne;M. Badiey;Kevin B. Smith
DOI：
10.1109/tvt.2002.800619
发表时间：
2003-04
期刊：
IEEE Trans. Veh. Technol.
影响因子：
--
作者：
Xiaobo Zhou;Xiaodong Wang-
通讯作者：
Xiaobo Zhou;Xiaodong Wang-
DOI：
10.1109/49.363139
发表时间：
1995
期刊：
IEEE J. Sel. Areas Commun.
影响因子：
--
作者：
Inhyok Cha;S. Kassam
通讯作者：
Inhyok Cha;S. Kassam
影响因子：
4.1
作者：
C. Bjerrum-Niese;L. Bjørnø;M. Pinto;B. Quellec
通讯作者：
C. Bjerrum-Niese;L. Bjørnø;M. Pinto;B. Quellec
DOI：
10.1109/5.720248
发表时间：
1998-12
期刊：
Proc. IEEE
影响因子：
--
作者：
G. Giannakis;C. Tepedelenlioğlu
通讯作者：
G. Giannakis;C. Tepedelenlioğlu