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

Classification method for base station to determine mode for pre-coding matrix selection

A technology of precoding matrix and classification method, which is applied in the field of base station decision-making and selection of precoding matrix, to achieve the effect of improving system throughput and reducing downlink control signaling overhead

Inactive Publication Date: 2009-04-01
ZTE CORP
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that NodeB does not accept UE feedback precoding matrix and chooses full-band precoding matrix under small probability, which will not bring significant 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
  • Classification method for base station to determine mode for pre-coding matrix selection
  • Classification method for base station to determine mode for pre-coding matrix selection
  • Classification method for base station to determine mode for pre-coding matrix selection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] In this embodiment, a method for classifying the manner in which a base station (Node B) decides to select a precoding matrix is ​​provided. In this method, the Node B is divided into three ways of processing the PMI reported by the UE: (1) accepting the PMI reported by the UE, that is, the NodeB accepts the PMI corresponding to all frequency bands on the frequency band reported to it by all UEs; 2) Node B considers that this uplink transmission is unreliable according to the channel conditions. At this time, it can select the PMI weights corresponding to all frequency bands in the frequency band reported by UE to Node B in the previous period, and discard the possible errors reported by UE this time. PMI transmission weight; (3) Node B skips the PMI reported by UE, but selects another precoding matrix from the codebook according to certain criteria, such as channel criteria or scheduling criteria, and uses this as the whole Precoded transmit matrix over frequency band....

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 invention discloses a classification method for the way of a Node B decision-making selection pre-coding matrix; the invention comprises: step S102, UE reports one or a plurality of PMIs to the Node B; step S104, the Node B judges whether the pre-coding matrix which one or a plurality of PMIs are corresponding to is reliable, the scheduling of the Node B and the channel correlation, and determines the way of the Node B decision-making selection pre-coding matrix according to the judging result; and step S106, the Node B marks the reserved part of a combination indicating bit according to the determined way of the Node B decision-making selection pre-coding matrix and sends the marked combination indicating bit to the UE. The invention can reduce the downlink control signaling overhead, thus effectively improving the system throughput.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method for classifying the manner in which a base station decides to select a precoding matrix in a Multiple-Input Multiple-Out-put (MIMO) wireless mobile communication system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is essentially a multi-carrier modulation communication technology, and it is one of the core technologies in the fourth generation mobile communication. [0003] In the frequency domain, the OFDM multipath channel exhibits frequency-selective fading characteristics. In order to overcome this fading, the channel is divided into multiple sub-channels in the frequency domain. The spectral characteristics of each sub-channel are approximately flat. Each OFDM sub-channel They are orthogonal to each other, so the spectrums of the sub-channels are allowed to overlap with each other, so that the spectrum resourc...

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
IPC IPC(8): H04L27/26H04L1/00H04B7/26
Inventor 支周于辉
Owner ZTE CORP