Wireless communication system link self-adaption transmission method

Abstract

The invention discloses a wireless communication system link self-adaption transmission method. The wireless communication system link self-adaption transmission method includes two parts, namely, a physical-layer transmission technology configuration method of link self-adaption modulation and coding and the like on the basis of average signal to noise ratio and signal to noise ratio difference factor, and an emission format configuration method applicable to multi-antenna system such as MIMO (multiple input multiple output) communication system on the basis of average signal to noise ratio and average multi-diameter relative energy factor. The wireless communication system link self-adaption transmission method can be used for places where quick link self-adaption technology is inapplicable, not only can be used for a single-antenna system but multi-antenna system and is lower in feed frequency as compared with that of the quick link self-adaption transmission method, load of the system can be reduced and meanwhile, performance of the self-adaption communication system can be effectively improved.

Description

technical field [0001] The invention relates to a communication system, in particular to a link adaptive transmission method of a wireless mobile communication system. Background technique [0002] The link adaptive technology of wireless communication system improves the data rate of wireless system by adaptively adjusting transmission parameters (such as modulation and coding, etc.). After years of research and practice, the link adaptive technology applied to the single-antenna system has achieved a lot of results, but for the emerging multi-antenna system, generally referring to the multiple-input multiple-output (MIMO) system, the link adaptive technology needs to be introduced The new dimension of adaptation, that is, spatial selectivity, makes the existing link adaptation techniques face challenges. In a typical wireless communication system, the signal at the receiver is composed of multiple copies of the same transmitted signal passing through different paths in th...

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Problems solved by technology

However, since the fast link adaptation technology is adaptive to instant channel changes, there is a high feedback rate, especially when the channel is very unstable, the feedback from the receiver to the transmitter may be frequent, which will bring a lot of pressure to the system. came a bigger burden

The existing slow link adaptive technology tracks the average of small-scale fading, so it has a low feedback rate, but for the growing MIMO communication system, it has not been well combined with spatial selectivity and will not be applicable In the universal wireless mobile communication system

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