Channel estimation method and system

A technology of channel estimation and estimated value, which is applied in the field of signal processing, can solve the problem that the bit error rate of the system needs to be improved, and achieve the effect of reducing the influence of noise

Inactive Publication Date: 2010-12-15
无锡端网云联科技有限公司
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a certain gap between the performance of LMMSE channel estimation

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 estimation method and system
  • Channel estimation method and system
  • Channel estimation method and system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The present invention provides a channel estimation method, which is improved on the basis of the existing LMMSE channel estimation method, thereby improving the accuracy of channel estimation.

[0039] Since the present invention is closely related to the existing LMMSE channel estimation method, in order to explain the improvement ideas and specific improvement methods of the present invention in detail, the existing LMMSE channel estimation method will be introduced in detail below.

[0040] First, the pilot refers to a cell-specific reference signal. The pilot-assisted channel estimation process is usually: the receiving end first extracts the pilot signal from the received signal, and uses the pilot signal to re...

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 provides a channel estimation method and a channel estimation system to improve the accuracy of channel estimation. The method comprises the following steps of: calculating a channel response estimation value at a pilot signal position; performing iterative filtering on the channel response estimation value at the pilot signal position to obtain a final channel response estimation value at the pilot signal position; and estimating channel response estimation values of all subcarriers and symbols according to the final channel response estimation value at the pilot signal position. Through multiple iterations, the method and the system can reduce the influence of noise on the channel response estimation values so as to improve the accuracy of the channel estimation.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a channel estimation method and system. Background technique [0002] As the LTE (LongTerm Evolution, Long Term Evolution) technology in the post-3G era of wireless networks, it has more advantages than 3G, such as: improving communication speed, spectrum efficiency, backward compatibility, and reducing delay. 3GPP (Third Generation Partnership Project) adopts OFDM (Orthogonal Frequency Division Multiplexing) in the downlink, which is Orthogonal Frequency Division Multiplexing technology. The sub-channels in OFDM technology are mutually orthogonal, thereby reducing the interference between carriers and eliminating Intersymbol interference is eliminated, and channel equalization after channel estimation is relatively easy. [0003] Generally, channel estimation methods can be classified into blind estimation methods and semi-blind estimation methods. Among them...

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): H04L25/02H04L25/03H04L27/26
Inventor 张辉王西强宋磊王飒爽
Owner 无锡端网云联科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap