Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Channel state measuring method, device and user terminal

A channel state and measurement method technology, applied in wireless communication, digital transmission system, electrical components, etc., can solve problems such as inability to guarantee CQI information, large errors, LTE system throughput loss, etc., to achieve accurate measurement, prevent excessive correction, The effect of improving measurement accuracy

Active Publication Date: 2015-05-27
SPREADTRUM COMM (SHANGHAI) CO LTD
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual complex and changeable wireless environment, there will still be large errors in many cases
Therefore, a single fixed correction value obtained through prior simulation cannot guarantee that the CQI information obtained by the base station can meet the decoding requirements of 10% Block Error Rate (Block Error, BLER), and cannot maximize the use of the transmission capacity of the wireless channel. throughput loss

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 measuring method, device and user terminal
  • Channel state measuring method, device and user terminal
  • Channel state measuring method, device and user terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Due to the complexity of the wireless channel and the diversity of channel coding methods, there is a certain error between the obtained average MI and the equivalent MI of the AWGN channel. In the prior art solution, the error is usually corrected by using a fixed correction value obtained by simulation. However, in some extreme cases, using a fixed correction value to correct the average MI still has a large error, which cannot meet the decoding requirement of 10% BLER, so that the transmission capacity of the wireless channel cannot be utilized to the maximum extent, resulting in the throughput of the LTE system. amount of loss.

[0049] In the embodiment of the present invention, the CRC statistics are performed on the decoding results of the data blocks transmitted by the PDSCH, and the average MI is correspondingly corrected according to the results of the CRC statistics, and the corresponding CQI information is selected by using the corrected average MI, and the ...

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

A channel state measuring method, device and user terminal are provided. The channel state measuring method includes: calculating average mutual information of a subcarrier in a current transmission mode; calculating a total amount of modification, and adding the total amount of modification to the average mutual information to obtain modified average mutual information; and selecting and sending channel state information comprising channel quality indication information corresponding to the modified average mutual information to a base station. Using the channel state measuring method and device can effectively increase the problem of measurement accuracy of the channel quality indication.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a channel state measurement method, device and user terminal. Background technique [0002] Long Term Evolution (LTE) is the long-term evolution of the general mobile communication system technology led by the 3rd Generation Partnership Project (3GPP), and is currently a widely recognized wireless communication technology. [0003] Since the transmission channel of wireless communication is a channel with multipath fading and time-varying, the channel state information (Channel State Information, CSI) will change constantly. In order for the LTE system to obtain the maximum system capacity in the wireless channel environment, the base station needs to select an appropriate modulation and coding method and sub-band resources according to the wireless channel environment of each mobile terminal. The mobile terminal needs to detect the CSI of the wireless chann...

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 Applications(China)
IPC IPC(8): H04L1/00H04L25/02H04W72/08H04W72/54
Inventor 董宇周秦英沈旭强董霄剑
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com