Link-adaptive transmission method for iterative reception

Abstract

The invention discloses a link self-adaptation transmission method under an iteration receiving condition. The method includes that firstly, channel information is used for calculating rate and handling capacity of a minimum mean square error linear receiving machine, the maximum rate and handling capacity are used as a standard respectively to select a rank indication and a channel quantity indication, and a value range of the rank indication of an iteration receiving machine and a value range of the channel quality indication are obtained; secondly, effective signal to noise ratio and link handling capacity of transmission code words under various pre-coding matrix indications are predicted; thirdly, the maximum handling capacity is used as a standard, the pre-coding matrix indication and the channel quality indication corresponding to the rank indication are selected, and the maximum value of the handling capacity corresponding to the rank indication is obtained; and fourthly, the handling capacity corresponding to the rank indication is compared, the rank indication, the pre-coding matrix indication and the channel quality indication corresponding to the maximum handling capacity are selected to be used as link feedback parameter combination. By means of the link self-adaptation transmission method, calculation amount is reduced, and the method is easy to achieve.

Description

technical field [0001] The present invention relates to a link adaptive transmission method in the case of iterative reception, in particular to a link adaptive transmission method in the case of iterative reception in the field of 3GPP LTE (Long Term Evolution of the Third Generation Partnership Project) standardization process. Background technique [0002] In order to meet the requirements of future mobile communication systems for higher data transmission rates, LTE and its evolution LTE-Advanced have improved and enhanced the air interface technology. In the actual wireless propagation environment, as the user equipment (UE, UserEquipment) moves, the channel between the UE and the base station (BS, BaseStation) may experience different types, resulting in the degradation of the performance of the LTE open-loop transmission system , therefore, in the LTE system, the closed-loop transmission technology is used to adapt to changes in the channel environment. [0003] In t...

AI Technical Summary

Problems solved by technology

Therefore, the traditional LA method is prone to errors when making RI and PMI selections

However, the calculation amount of the optimal method is very large, which increases the calculation time, and the resulting delay is not good for LA technology.

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