用于时变信道估计的 D* 正交匹配追求算法。

IF 2.1 2区 物理与天体物理 Q2 ACOUSTICS
Shuyang Jia, Lianglong Da, Sichen Zou, Baoheng Liu, Xiaochuan Zhang
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引用次数: 0

摘要

正交匹配搜索(OMP)与 A* 搜索算法(A*OMP)相结合,在合成稀疏数据和信号时表现出强大的重构能力,与传统 OMP 相比,重构误差相对较小,精确恢复能力较强。然而,A*OMP 只适用于静态信道估计,无法应用于动态场景。这是因为每帧连续几个正交频分复用块的信道延迟相似,且路径增益表现出时间相关性。本文介绍了一种动态 OMP 方法(D*OMP),它采用了 A*OMP 的启发式函数和独特的反向过程,能在未知和不断变化的环境中识别稀疏解。所提出的方法对于跨多个区块的联合信道估计非常实用。仿真和海试结果表明,D*OMP 不仅具有卓越的信道恢复精度,而且具有更高效的信道重建过程,其性能优于 A*OMP 和传统的 OMP。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A D* orthogonal matching pursuit algorithm for time-varying channel estimation.

Orthogonal matching pursuit (OMP) combined with the A* search algorithm (A*OMP) exhibits robust reconstruction capabilities for synthesizing sparse data and signals, achieving relatively low reconstruction errors and a higher exact recovery ability than conventional OMP. However, A*OMP is only suitable for static channel estimation and cannot be applied to dynamic scenarios. This is because the channel delays for several consecutive orthogonal frequency-division multiplexing blocks per frame are similar and the path gains exhibit temporal correlation. This paper introduces a dynamic OMP approach (D*OMP) that employs a heuristic function of A*OMP and a unique reverse process, enabling sparse solutions to be identified in unknown and changing environments. The proposed method is highly practical for joint channel estimation across multiple blocks. Simulation and sea trial results indicate that D*OMP not only possesses superior channel recovery accuracy, but also has a more efficient channel reconstruction process, outperforming both A*OMP and conventional OMP.

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来源期刊
CiteScore
4.60
自引率
16.70%
发文量
1433
审稿时长
4.7 months
期刊介绍: Since 1929 The Journal of the Acoustical Society of America has been the leading source of theoretical and experimental research results in the broad interdisciplinary study of sound. Subject coverage includes: linear and nonlinear acoustics; aeroacoustics, underwater sound and acoustical oceanography; ultrasonics and quantum acoustics; architectural and structural acoustics and vibration; speech, music and noise; psychology and physiology of hearing; engineering acoustics, transduction; bioacoustics, animal bioacoustics.
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