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Joint channel and Doppler estimation for OSDM underwater acoustic communications

机译：OSDM水下声通信的联合信道和多普勒估计

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摘要

Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising modulation scheme for underwater acoustic communications.Although providing more flexibility in system design.it suffers from a special interference structure over time-varying channels.To enable reliable OSDM equalization.we propose a joint channel impulse response and Doppler estimation algorithm in this paper.Compared to the existing method.which solves a nonconvex bilinear optimization problem iteratively in the frequency domain without a guarantee of global optimality.the proposed algorithm transforms the problem into a convex quadratic minimization in the time domain and can achieve a closed-form solution.
机译：正交信号分割多路复用（OSDM）作为一种有前景的水下声通信调制方案已经出现，尽管在系统设计中提供了更大的灵活性，但它在时变信道上受到特殊的干扰结构的影响，为了实现可靠的OSDM均衡，我们建议与现有方法相比，该方法在不保证全局最优性的情况下，在频域上迭代求解了非凸双线性优化问题，该算法将问题转化为凸二次最小化。时域并可以实现封闭形式的解决方案。

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  • 来源
    《Signal processing》 |2020年第5期|28.1-28.5|共5页
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  • 作者单位

    School of Marine Science and Technology Northwestern Polytechnical University Xi'an 710072 China;

    Department of Electrical Communication Engineering Indian Institute of Science Bangalore 560012 India;

    Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Delft 2826 CD the Netherlands;

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  • 正文语种 eng
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  • 关键词

    Channel estimation; Doppler estimation; Time-varying channels; Underwater acoustic communications; OSDM;

    机译：信道估计;多普勒估计;时变频道;水下声通信;OSDM;

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