Adaptive adjustment method of adaptive transmission channel

The invention discloses an adaptive adjustment method of an adaptive transmission channel, and relates to the field of satellite transmission. The method comprises the following steps: first, screening out a variety of coding and modulation modes for adaptive adjustment according to the spectrum efficiency of a variety of coding and modulation mode combinations, the signal-to-noise ratio needed by a receiver under the condition of same bit error rate, and the precision of channel estimation error; then, verifying whether the screened-out coding and modulation modes conform to the requirements of indicators at the receiver; and finally, according to the variation of channel estimated value and based on the principle of maximum service traffic, selecting a coding and modulation mode maximizing the service traffic under the premise of reserving service traffic allowance. Through the method, high transmission rate and high spectrum utilization rate are achieved by changing the modulation mode, the coding mode or