适用于水声移动通信的调制方式

doi:10.12305/j.issn.1001-506X.2025.08.30

Abstract

Abstract:

The traditional orthogonal frequency division multiplexing （OFDM） underwater acoustic communication generates complex inter-carrier interference （ICI） over doubly-spread channels, which seriously affects communication performance. This paper introduces a multicarrier modulation method, geometric subcarrier multicarrier communications （GSMC）, which combines the characteristics of high Doppler tolerance for underwater acoustic detection hyperbolic frequency modulation signals. The subcarrier bandwidth of GSMC increases proportionally to frequency from low frequency to high frequency, and the orthogonality can be maintained, and ICI can be reduced even through the doubly-spread channels with delay and Doppler. This feature compresses the channel matrix by using a single tap diagonal matrix instead of the original matrix for direct inversion, which is caused by the inversion operation of the minimum mean square error algorithm. Simulation results indicate that GSMC has superior bit error rate performance over OFDM in double-spread channels and is compatible with system performance and computational complexity for low-complexity algorithm.

Key words: underwater acoustic communication, multicarrier modulation, doubly-spread channel, orthogonal frequency division multiplexing （OFDM）

CLC Number:

TN 929.3

Yongxing FAN, Yangfan ZHANG, Haining HUANG. Modulation method suitable for underwater acoustic mobile communication[J]. Systems Engineering and Electronics, 2025, 47(8): 2727-2736.

Figures/Tables 15

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Table 1

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References 17

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仿真参数	参数值
起始频率/kHz	2
终止频率/kHz	4
子载波个数	347
符号持续时间/ms	500
最大时延/ms	40/100
最大残余多普勒因子	1.0002/1.0005
信道编码	1/2
正交幅度调制	4

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Modulation method suitable for underwater acoustic mobile communication

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