Meteor trail self-adapting variable-velocity burst modem

Abstract

The invention discloses a meteor burst self-adapting variable rate burst modem relating to a strong-anti-sudden and anti-rapid fading meteor burst modem device in the communication field. The device comprises a codec, a modem, an upconverter, a filter, an amplifier, a variable rate modulation protocol controller, a signal-noise ratio estimator, a variable demodulation protocol controller, an automatic gain control amplifier, a geophone and a power. The meteor burst self-adapting variable rate burst modem can automatically adjust the information transmission rate according to the channel status, the transmitting frequency is adjustable and controllable. The redundant information in the data is reduced and the information transmission efficiency is improved by using a rapid frame structure identification, rapid synchronization and rapid convergence technology. The meteor burst self-adapting variable rate burst modem of the invention has advantages of high integration degree, simple circuit, small size, easy operation and stable and reliable performance and is especial for the meteor burst channel with strong burst, rapid fading and short lifespan of channel.

Description

technical field [0001] The invention relates to a meteor trail self-adaptive variable rate burst modem in the communication field. It is especially suitable as a modem device in the meteor trail communication channel with strong burst and fast fading. Background technique [0002] When the data is transmitted on the meteor trail channel with strong burst and fast fading, especially when the available time of communication is very short, the common continuous communication mode adopting too long data stream and error correction code structure is no longer applicable. Therefore, a certain protocol and modulation and demodulation structure specially designed for burst communication must be adopted to ensure fast and reliable data transmission. Since the meteor trail channel is bursty and the channel exists for a short time, a short data frame length is required. However, the fading of the channel requires the error correction code to have a strong error correction capability,...

AI Technical Summary

Problems solved by technology

In addition, in the process of burst communication, because the communication time is very short, the fast synchronization, fast convergence, and fast frame format discrimination required by the system are all problems that have never been faced in continuous communication.

Because the fixed rate transmission mode is adopted in the traditional meteor burst communication, the communication capacity provided by the channel is wasted when the channel condition is relatively good, thus affecting the communication efficiency

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