An Adaptive Variable Rate Device for Burst Asymmetric Channels

Abstract

The invention discloses an adaptive variable rate device for a burst asymmetric channel, which relates to a burst asymmetric communication system in the field of wireless communication, especially a meteor trail communication system, which can be completed in a short time according to channel fading Rate-adaptive information transmission. The device includes a demodulator, a modulator, a variable rate protocol control unit, a signal-to-noise ratio estimation unit and a power supply; the present invention mainly completes the signal-to-noise ratio estimation of the received signal and sends it to the opposite end through a channel, according to the signal-to-noise ratio of the opposite end and The transmission rate is controlled by channel fading characteristics. This device makes the entire communication rate adaptively match the channel condition, makes the communication rate close to the instantaneous channel capacity, thereby improving the information throughput of the wireless communication system; Signal level requirements, improve the utilization of small signals, greatly shorten the average waiting time of communication.

Description

technical field [0001] The invention relates to an adaptive variable rate device for a burst asymmetric channel in the field of wireless communication, and is particularly suitable for a communication system of a wireless burst asymmetric channel, especially for a meteor trail burst communication system. Background technique [0002] The rate-adaptive transmission mode used in the traditional meteor trail burst communication, first, the signal-to-noise ratio of the received signal at the local end is used to determine the transmission rate of the local end. The disadvantage of this is that if the channel is asymmetrical, the channel at this time is not suitable for the The transmission rate is low, and the information throughput is low. Second, the use of rate indication and time-division transmission of data also leads to low channel utilization. The long-term field test data show that the rate adaptive system used in the traditional meteor trail burst communication needs ...

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Problems solved by technology

[0002] The rate-adaptive transmission mode used in the traditional meteor trail burst communication, first, the signal-to-noise ratio of the received signal at the local end is used to determine the transmission rate of the local end. The disadvantage of this is that if the channel is asymmetrical, the channel at this time is not suitable for the High rate transmission, low information throughput

Second, the use of rate indication and time-division transmission of data also leads to low channel utilization

The long-term field test data show that the rate adaptive system used in the traditional meteor trail burst communication needs to be improved

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