A digital underwater voice communication device and underwater voice communication method

Abstract

The invention discloses a digital underwater voice communication device and an underwater voice communication method. It mainly solves the problem of information communication between underwater operators. The device uses different hardware platforms to realize speech compression coding and underwater acoustic communication, and uses OFDM modulation technology and MBE speech compression technology in combination. The real-time estimation of the channel through the channel estimation module can adaptively change the communication of the device. parameters and compression bit rate, and provide half-duplex underwater acoustic communication in two modes of user voice and text. The device can be widely used in various underwater operations, such as underwater archaeology, communication between underwater submersibles, communication between divers, and communication between underwater operators and shore bases. Communication has a strong practicality.

Description

technical field [0001] The present invention relates to the field of underwater communication, in particular to a digital underwater voice communication device and underwater voice communication combined with Orthogonal Frequency Division Multiplexing (OFDM) technology and Multi-Sideband Excitation (MBE) low bit rate voice compression technology method. Background technique [0002] In recent years, with the development of underwater acoustic communication technology, digital underwater acoustic voice communication combined with voice compression technology has been widely used in military and civilian fields, such as ocean exploration, underwater archaeology, communication between frogmen, submarines or ships Communication with shore-based consoles, etc. Underwater acoustic voice communication technology has also experienced the development process from analog to digital. In the initial stage of analog modulation, in order to reduce the bandwidth, underwater acoustic commu...

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Problems solved by technology

[0003] The deficiencies and difficulties in the design of underwater voice communication devices are: (1) In the underwater acoustic channel with limited bandwidth resources, it is necessary to perform real-time, continuous, large-scale voice compression and underwater acoustic data communication, which increases the voice compression. Difficulty in implementing coding and underwater acoustic communication algorithms; (2) The communication algorithm and the voice coding algorithm are implemented on the same hardware platform. Underwater acoustic communication technology usually uses DSP as the implementation platform, and implementing the communication algorithm and voice coding algorithm on the DSP at the same time consumes A large number of resources, if necessary, sacrifice the performance of the algorithm to realize the overall voice communication function; (3) The underwater acoustic channel has complex characteristics such as time-space-frequency variation, and the adaptability of the communication algorithm to complex channels should be considered comprehensively when designing , the application environment of underwater acoustic voice communication equipment without adaptive function is relatively limited, and its practicability is low

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