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Approximation Norm Estimations of Sparse Underwater Acoustic Channel

Abstract

声波是目前水下无线通信方式中广泛采用的信号传输媒介,且水下声传播面临着与陆地无线电通信中不曾有的困难和挑战,如:随载波频率增加而衰减严重;传播路径的多变性;以及速度约为1500m/s的传播速度。这些约束使得水声信道具有较为明显的时延多普勒双扩展等现象。 论文以水声通信系统为应用背景,针对稀疏水声信道下的可靠通信问题,以水声信道稀疏特性-信道建模-信道估计-均衡器输出结果验证为主线,着重研究水声信道估计算法。在算法理论研究的基础上,结合多次数值仿真和海试实验;进而通过数据处理分析,验证论文方案的有效性。 本文结合稀疏水声信道估计的实际应用场景以及压缩感知领域中出现的稀疏信号恢复方法,...Sound is a commonly adopted medium in underwater wireless communication, in addition, underwater acoustic communication faces the difficulties and challenges which haven't been encountered in the terrestrial wireless communication, e.g. signal strength falls off with carrier frequency; the variability of the propagation paths; and the transmitted speed is limited to round of 1500 m/s. All these co...学位:理学博士院系专业:海洋与地球学院_海洋物理学号:3112011015361

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