A full-duplex underwater acoustic digital voice communication system and method thereof
A digital voice and communication system technology, applied in the direction of digital transmission system, duplex signal operation, voice analysis, etc., can solve the problem of only working transmitting or receiving status, and achieve easy debugging and strong maintainability, low power consumption, cheap effect
Active Publication Date: 2021-11-09
XIAMEN UNIV
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[0004] Although the research on underwater acoustic digital voice communication has made great progress, most of the existing systems work in half-duplex mode, that is, they can only work in the transmitting or receiving state at a certain time.
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[0042] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.
[0043] The full-duplex underwater acoustic digital voice communication system such as figure 1 shown. The system is divided into communication parties A and B, denoted as U 1 and U 2 . u 1 and U 2 Have the same hardware structure, mainly including microphone, earphone, WT600F vocoder, TMS320 C6748 DSP, power amplifier and matching device, preamplifier, band-pass filter, circuit management module, underwater acoustic transducer and hydrophone, etc. part. The bandwidth of the underwater acoustic transducer is 20-30kHz, which is divided into 3 sub-bands: 20-24kHz, 24-26kHz and 26-30kHz. The communication party U 1 Use the 20-24kHz sub-band to transmit signals, and the 26-30kHz sub-band to receive signals; the communicating party U 2 Use the sub-bands of 26-30kHz to transmit signals, the sub-bands of 20-24kHz to receive signals, and the sub-bands ...
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A full-duplex underwater acoustic digital voice communication system and its method relate to the field of underwater acoustic communication. The system consists of communication parties A and B, denoted as U 1 and U 2 ; The underwater acoustic transducer adopts a circular tube type broadband transducer, and its bandwidth is divided into B 1 , B 2 and B 3 Wait for 3 different subbands, where subband B 1 and B 3 have the same bandwidth W 1 , B 2 The bandwidth is W 2 ; 1 and U 2 The hardware part consists of voice input and output devices, low-rate vocoder and its peripheral circuits, DSP and its peripheral circuits, power amplifier and its matching circuit, preamplifier, band-pass filter, power management module, underwater acoustic transducer And components such as hydrophones. It can realize real-time full-duplex communication function. The system delay is small, adapting to the fast time-varying underwater acoustic channel environment, and the voice synthesized at the receiving end has high intelligibility, naturalness and clarity. The system is portable, robust, low power consumption, and cheap. The system is upgradeable, easy to debug and highly maintainable.
Description
technical field [0001] The present invention relates to the field of underwater acoustic communication, in particular to a full-duplex underwater acoustic digital voice communication system and method based on a vocoder and a digital signal processor (Digital Signal Processor, DSP for short). Background technique [0002] Underwater voice communication has important application value both in civilian and military applications. Early underwater voice communication mainly used cables. Although this communication method is simple and efficient, and the output voice has high intelligibility, naturalness and clarity, the range of activities of underwater operators is limited by the length of the cable. . The cable is too long, or may be twisted or broken in some complex ocean environments, resulting in the failure of normal voice communication. [0003] In recent years, with the deepening of marine research and development, underwater wireless voice communication has attracted ...
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IPC IPC(8): H04B13/02H04L5/14H04L27/26G10L19/008G10L19/16
CPCG10L19/008G10L19/167H04B13/02H04L5/14H04L27/2601H04L27/2628
Inventor 刘胜兴赵振华
Owner XIAMEN UNIV