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. The problem of the information communication of underwater operation personnel is mainly solved. According to the device, different hardware platforms are used for achieving voice compression coding and underwater acoustic communication respectively, an OFDM modulation technique and an MBE voice compression technique are used in a combined mode, a channel estimation module carries out real-time estimation on a channel, the communication parameters and the compression code rate of the device can be changed for the channel in a self-adaption mode, and half-duplex underwater acoustic communication with a voice mode and a text mode is provided for a user. The device can be widely applied to various underwater operations, such as underwater archaeology, the communication of underwater vehicles, the communication of underwater operation personnel and a shore base and other fields, can achieve good underwater communication and has 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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