Self-adaptive variable rate device for burst asymmetric channels

Abstract

The invention discloses a self-adaptive variable rate device for burst asymmetric channels, and relates to burst asymmetric communication systems in the field of wireless communication, in particular to a meteoric trail communication system. The self-adaptive information transmission of rate can be completed according to channel fading in a short period of time. The device comprises a demodulator, a modulator, a variable rate protocol control unit, a signal-to-noise ratio estimation unit and a power supply; the signal-to-noise ratio estimation of received signals is completed, the received signals are sent to an opposite terminal through the channels, and the sending rate is controlled according to the signal-to-noise ratio of the opposite terminal and the characteristic of channel fading. According to the device, the whole communication rate is adaptively matched with the channel condition, so that the communication rate is approximate to the instantaneous channel capacity, and the information throughput of a wireless communication system is improved; moreover, the speed is self-adaptively reduced for transmission under the condition of low signal-to-noise ratio, the requirement of the system for receiving signal level is lowered, the utilization rate of small signals is improved, and the average waiting time of communication is greatly shortened.

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 ...

AI Technical Summary

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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