对于具有强烈随机变化多径、噪声、多普勒的水声信道，采用单一调制方式、固定参数的水声通信系统很难满足高质量水声通信的需求。本文提出根据信噪比、多径数和多普勒频偏进行信道质量评估并通过切换通信制式优化调整的自适应调制水声通信方案，利用浅海信道海试实验数据进行的分析表明，自适应调制方案在信道状况变差时可改善通信性能。
For underwater acoustic channels with strongly random variation of multipath, noise, and Doppler, it is difficult for an underwater acoustic communication system with a single modulation method and fixed parameters to meet the requirements of high-quality underwater acoustic communication. This paper proposes an adaptive modulation underwater acoustic communication scheme that evaluates channel quality based on signal-to-noise ratio, multipath number, and Doppler frequency offset, and optimize the adjustment by switching communication methods. The analysis using the experimental data of the shallow sea channel shows that the adaptive modulation scheme can improve the communication performance when the channel condition becomes worse.
2021,43(10): 158-162 收稿日期：2020-10-28
DOI：10.3404/j.issn.1672-7649.2021.10.032
分类号：TN929.3
基金项目：国家自然科学基金资助项目(11274259)；声呐技术重点实验室基金项目
作者简介：邱逸凡(1998-),男,硕士研究生,研究方向为水声通信
参考文献：
[1] MANI S, DUMAN T M, HURSKY P. Adaptive codingmodulation for shallow-water UWA communications[J]. The Journal of the Acoustical Society of America, 2008, 123(5): 3749
[2] A. RADOSEVIC, R. AHMED, JOHN G T. DUMAN J. PROAKIS, et al Adaptive OFDM modulation for underwater acoustic communications: Design considerations and experimental results[J]. IEEE Journal of Oceanic Engineering, 2014, 39(2): 357–370
[3] WAN L, ZHOU H, XU X, et al. Adaptive modulation and coding for underwater acoustic OFDM[J]. IEEE Journal of Oceanic Engineering, 2015, 40(2): 327–336
[4] 李轩, 王磊, 孙长瑜. 基于正交频分复用的水声自适应通信系统性能仿真研究[J]. 应用声学, 2011, 30(1): 1–12
[5] 罗亚松, 胡生亮, 刘志坤, 等. 正交频分复用水声通信自适应调制算法[J]. 国防科技大学学报, 2017, 39(1): 153–158
[6] 陈伟林. OFDM自适应编码调制水声通信技术的研究与实现[D].哈尔滨：哈尔滨工程大学, 2013.
[7] 吴雨珊. 自适应调制与功率分配的OFDM水声通信技术[D].哈尔滨：哈尔滨工程大学, 2019.
[8] FU Q, SONG A. Adaptive modulation for underwater acoustic communications based on reinforcement learning[C]// OCEANS 2018 MTS/IEEE Charleston. IEEE, 2018.
[9] SU W, LIN J, CHEN K, et al. Reinforcement learning-based adaptive modulation and coding for efficient underwater communications[J]. IEEE Access, 2019, PP(99): 1–1
[10] 王安义, 李萍, 张育芝. 基于SARSA算法的水声通信自适应调制[J]. 科学技术与工程, 2020, 20(16): 6505–6509
[11] 胡凯. 浅谈水声通信及相关技术应用[J]. 数字技术与应用, 2017(04): 39+41
[12] STOJANOVIC, Milica. Retrofocusing techniques for high rate acoustic communications[J]. Journal of the Acoustical Society of America, 2005, 117(3): 1173–1185
[13] STOJANOVIC M, PREISIG J. Underwater acoustic communication channels: Propagation models and statistical characterization[J]. IEEE Communications Magazine, 2009, 47(1): 0–89
