arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.00859eess.SP
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相关快时变水声信道的动态跟踪

Dynamic Underwater Acoustic Channel Tracking for Correlated Rapidly Time-varying Channels

Qihang Huang, Wei Li, Weicheng Zhan, Yuhang Wang, Rongrong Guo

摘要:

在这项工作中,我们专注于基于模型的子空间信道跟踪在相关的水声信道的模型失配问题。基于水声信道的相关性建立的模型可以作为卡尔曼滤波器的状态空间模型,与没有模型的情况相比,可以提高水声信道的跟踪性能。尽管数据支持模型慢变和一定程度上不相关的假设,但为了进一步提高跟踪性能,不能忽略模型失配问题,因为大多数信道模型在水声信道中都遇到了这个问题。因此,在这项工作中,我们提供了一个动态的时变状态空间模型的水声信道跟踪。该模型能够容忍去相关后的微小相关。此外,前向后卡尔曼滤波器相结合,以进一步提高跟踪性能。我们所提出的算法的性能证明与相同的海上数据用于传统的信道跟踪。与传统算法相比,该算法具有显著的性能改善,尤其是在信道变化快的恶劣海况下。

英文摘要:

In this work, we focus on the model-mismatch problem for model-based subspace channel tracking in the correlated underwater acoustic channel. A model based on the underwater acoustic channel's correlation can be used as the state-space model in the Kalman filter to improve the underwater acoustic channel tracking compared that without a model. Even though the data support the assumption that the model is slow-varying and uncorrelated to some degree, to improve the tracking performance further, we can not ignore the model-mismatch problem because most channel models encounter this problem in the underwater acoustic channel. Therefore, in this work, we provide a dynamic time-variant state-space model for underwater acoustic channel tracking. This model is tolerant to the slight correlation after decorrelation. Moreover, a forward-backward Kalman filter is combined to further improve the tracking performance. The performance of our proposed algorithm is demonstrated with the same at-sea data as that used for conventional channel tracking. Compared with the conventional algorithms, the proposed algorithm shows significant improvement, especially in rough sea conditions in which the channels are fast-varying.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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