Unlock instant, AI-driven research and patent intelligence for your innovation.

Channel state information feedback method and device

A channel state information and feedback mode technology, applied in the field of communication, can solve problems such as system performance degradation, low precision, and inaccurate antenna calibration results, and achieve the effect of improving system performance

Inactive Publication Date: 2017-04-12
ZTE CORP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0051] The main purpose of the present invention is to provide a channel state information feedback method and device to at least solve the problem of inaccurate antenna calibration results due to the relatively low accuracy of feedback channel state information, resulting in system performance degradation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Channel state information feedback method and device
  • Channel state information feedback method and device
  • Channel state information feedback method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] This embodiment provides a method for feedbacking channel state information, the method including the following steps:

[0126] Step S402: UE determines channel CQI, PMI and RI according to channel information. Wherein, the PMI information may include a first precoding matrix indicator (i1) and a second precoding matrix indicator (i2).

[0127] Step S404: the UE reports channel state information to the base station on the PUSCH.

[0128] Wherein, the channel state information includes PMI information, CQI information and RI information;

[0129] Among them, the PMI information includes single PMI in the four-antenna system; the PMI information includes i1 and i2 in the eight-antenna system;

[0130] Specifically, in step S404, the UE feeds back the channel state information to the base station on the physical uplink shared channel (PUSCH) according to one of the following predetermined feedback methods.

[0131] Feedback wideband CQI, wideband PMI, CQI of each subban...

Embodiment 2

[0141] This embodiment provides a method for feedbacking channel state information, the method including the following steps:

[0142] In step S502, the UE determines channel quality indicator information (CQI), precoding matrix indicator information (PMI) and rank indicator information (RI) according to the channel information. Wherein, the PMI information may include a first precoding matrix indicator i1 and a second precoding matrix indicator i2.

[0143] In step S504, the UE reports channel state information to the base station.

[0144] Wherein, the channel state information includes PMI information, CQI information and RI information;

[0145] Among them, the PMI information includes single PMI in the four-antenna system; the PMI information includes i1 and i2 in the eight-antenna system;

[0146] Specifically, in step S404, the UE feeds back the channel state information to the base station on the physical uplink shared channel (PUSCH) according to one of the followin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a channel state information feedback method and device. The method includes: a terminal uses a pilot signal to determine channel state information including N pieces of PMI information on the system bandwidth; the terminal feeds back the channel state information; wherein, the system bandwidth is S subband sets configured by the upper layer, N is an integer greater than 1 and less than S. Through the invention, the performance of the communication system is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel state information feedback method and device. 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 (Single User Multi-Input Multi-Output, referred to as SU-MIMO), directly use the channel feature vector information for precoding; MU-MIMO), more accurate channel information is required to guide multi-user precoding. [0003] In the Long Term Evolution (LTE for short) standard, the min...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L1/16
Inventor 徐前子陈艺戬杨勋徐俊李儒岳张峻峰
Owner ZTE CORP