Feedback method of channel state information and terminal

A technology of channel state information and channel information, which is applied in the direction of transmission modification and transmission system characterized by signaling and based on link quality, and can solve problems such as not meeting the requirements of LTE-A system
CN101902307AInactive Publication Date: 2010-12-01ZTE CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2010-12-01
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A feedback method of channel state information comprises the following steps: in the mode supporting closed-loop space multiplexing, user equipment (UE) uses at least two report types to feed back the channel state information, wherein when the rank RI of the channel is not more than M, the UE uses a code word W1 and a code word W2 to jointly represent the subband or wideband channel information, the report type A includes the indication information of the rank RI of the channel and the indication information of partial code word W1 and the report type B includes the indication information of the code word W2 and the indication information of partial code word W1; and when the rank RI of the channel is more than M, the UE uses one code word W to represent the subband or wideband channel information and feeds the indication information of the code word W back to a base station or does not feed back the code word information, or the UE uses a fixed matrix and code word W to jointly represent the subband or wideband channel information. The method satisfies the requirement of the LTE-A system and dispenses with PUCCH expansion.
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Description

technical field

[0001] The present invention relates to the technical field of mobile communication, in particular to a channel state information feedback method and a terminal. Background technique

[0002] In a wireless communication system, the sending end and the receiving end use multiple antennas to obtain a higher rate by means of spatial multiplexing. Compared with the general spatial multiplexing method, an enhanced technology is that the receiving end feeds back the channel information to the sending end, and the sending end uses the transmit precoding technology according to the obtained channel information, which can greatly improve the transmission performance. For Single User Multi-input Multi-output (SU-MIMO), channel feature vector information can be directly used for precoding; for Multiple User MIMO (MU-MIMO), More accurate channel information is required.

[0003] In the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) Long T...

Claims

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