Codebook Encoding Information Processing Method Using Channel Time Domain Correlation to Reduce Feedback Amount

Abstract

The invention relates to a codebook coded message processing method for reducing feedback quantity through channel time domain relativity. The method comprises the following steps that 1), a user terminal computes a channel estimated value of the user terminal; 2), the user terminal selects the most relevant code word in a given codebook according to the channel estimated value, and computes an index value corresponding to the code word, wherein the index value comprises a first half part and a second half part; 3), the user terminal compares the index value of the code word with an index value of the previous code word, judges whether the front half parts of the index values are the same, if yes, the user terminal only feeds back the second half part of the index value to a sending end, or else, the user terminal feeds back all the index values; and 4), the sending end looks up the corresponding code word according to the received index value of the codebook, and serves the corresponding code word as a user channel estimated value. Compared with the prior art, the method has the advantages that the message quantity fed back when a user moves at a low speed can be reduced effectively.

Description

technical field [0001] The invention relates to a codebook encoding information processing method in wireless communication, in particular to a codebook encoding information processing method which utilizes channel time domain correlation to reduce feedback amount. Background technique [0002] As one of the key technologies of the physical layer of the next-generation wireless communication system, MIMO technology has been widely and deeply applied in the standard formulation of the next-generation wireless communication system by various standardization organizations. In order to further improve system capacity and spectrum utilization, the current 3GPP standard formulation has carried out in-depth research on enhanced MIMO technology. In addition to extending the number of antennas from the existing 4-antenna application to 8-antenna, the multi-user MIMO transmission scheme is also In-depth discussions were held. [0003] At present, in the formulation of 3GPP standards,...

AI Technical Summary

Problems solved by technology

However, one disadvantage of differential feedback is that there is error propagation. If an error occurs in the index value fed back at a certain moment, the subsequent feedback information that relies on the index value will produce greater errors, resulting in a decrease in system performance.

Images