Research on Orthogonal Frequency Division Multiplexing Underwater Communication Based on Differential Amplitudeand Phase-shift Keying Modulation Using Acoustic Vector Sensor

doi:10.3969/j.issn.1000-1093.2014.04.009

Abstract

Abstract: To further improve the quality of underwater acoustic communication on the premise that the bandwidth utilization rate is not reduced, an orthogonal frequency division multiplexing (OFDM) underwater communication system using acoustic vector sensor and differential amplitude and phase-shift keying (DAPSK) modulation is presented by describing the principle of DAPSK modulation and vector signal processing technology. According to the actual sound velocity gradient, the true acoustic channel is modulated using the channel modulator. The performance of system is researched. The results show that the spatial gain can be obtained by the linear combined signal processing, including pressure and particle velocity data from acoustic vector sensor gains. And the performance of OFDM underwater communication system using acoustic vector sensor and DAPSK modulation is better than that of the scalar one.

Key words: acoustics, underwater acoustic communication, high rate communication, orthogonal frequency division multiplexing, differential amplitude and phase-shift keying, acoustic vector sensor, vector signal processing

CLC Number:

TN929

MA Xu-zhuo, FANG Er-zheng. Research on Orthogonal Frequency Division Multiplexing Underwater Communication Based on Differential Amplitudeand Phase-shift Keying Modulation Using Acoustic Vector Sensor[J]. Acta Armamentarii, 2014, 35(4): 489-494.

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