Transmission method capable of reducing self-adaption frequency-select block of back information

Abstract

The invention provides a self-adapting frequency selection blocking transmission method of reducing feedback information, comprising: (1) channels are grouped; (2) frequency is selected initially; (3) an inchoation processes signal mapping according to an adopted modulation mode, and gains a frequency domain form of awaiting sending information according to sub-channel group marker information, and converts back time domain and sends time domain signals; (4) the inchoation processes frequency domain equalization for the received signals according to the sub-channel group marker information, and converts back the time domain signals and finishes judgment; (5) the inchoation processes channel estimation or prediction to gain renewed channel state information, and determines if the sub-channel group marker information need to be renewed according to a self-adapting judgment rule. The invention better solves a problem of excessive the feedback information in the premise of guaranteeing system performance. A simulation result shows that the invention can guarantee that the bit error rate of the system is not more than 5*10<-3>, and the transmission rate of the system is not lower than 7.5Mbps, and the feedback information rate of reverse channels is not over than 100Kbps.

Description

An adaptive frequency-selective block transmission method to reduce backhaul information technical field The invention relates to a broadband digital communication transmission method and belongs to the technical field of broadband wireless communication. Background technique Communication technology has developed rapidly in recent decades, especially since the 1990s, and has had a profound impact on people's daily life and the development of the national economy. The future communication technology is developing towards broadband and high speed, so many broadband digital transmission technologies have received extensive attention. :SingleCarrierwithFrequencyDomainEqualization) are two broadband digital transmission technologies that are valued by people. They both belong to the block transmission technology. At present, OFDM has attracted far more attention than SC-FDE, and has become a supporting technology in various standards, such as: IEEE802.11a in wireless local ar...

AI Technical Summary

Problems solved by technology

The present invention aims at the problem that the amount of returned information is too large in the existing adaptive frequency selection and block transmission method in the existing mobile broadband channel, and provides an adaptive frequency selection and block transmission method that can reduce the return information, which can be used in broadband mobile Under the premise of ensuring system performance in communication, it is better to solve the problem of excessive amount of returned information

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