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

Data-guiding channel estimation method for OFDM systems, and implementation device thereof

A technology of channel estimation and position estimation, applied in the field of digital information transmission, can solve the problem of training information occupying system spectrum resources, etc., achieve the effects of improving spectrum utilization, simplifying implementation, and improving system mobility performance

Active Publication Date: 2009-11-25
TSINGHUA UNIV
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Training information occupies precious system spectrum resources, so how to reduce training information and improve system spectrum utilization is a challenge for OFDM systems while meeting the needs of synchronization and 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
  • Data-guiding channel estimation method for OFDM systems, and implementation device thereof
  • Data-guiding channel estimation method for OFDM systems, and implementation device thereof
  • Data-guiding channel estimation method for OFDM systems, and implementation device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] In order to make the purpose, content, and advantages of the present invention clearer, the following further describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0045] As described in the background art, the OFDM system includes a variety of OFDM block modulation techniques, guard interval filling techniques, training information carrying techniques, and symbol modulation techniques.

[0046] Refer to figure 1 , Represents one of the embodiments, a schematic diagram of the frame structure of a TDS-OFDM system. The frequency domain symbol to be transmitted in the i-th frame is X i (k), any symbol modulation technique can be selected. The frequency domain symbols to be transmitted form a frequency domain data block of length M {X i (k)) i＝0 M-1 , Does not include pilots and virtual sub-carriers. Frequency domain data block {X i (k)) i＝0 M-1 After inverse discrete Fourier transform, the time domain data block {x i [n]...

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 data-guiding channel estimation method for OFDM systems, and an implementation device thereof, which belong to the technical field of digital information transmission. The method demodulates and recovers frequency-domain data symbols at the receiving end of an OFDM system and performs channel estimation. The method comprises the steps of utilizing a frame structure to obtain initial channel estimation result, building a time-domain signal frame and the cyclic convolution of channel impulse response, demodulating frequency-domain data symbols of a current frame, and performing data-guiding channel estimation and post processing. The device comprises an initial channel estimation module, a channel estimation gating module, a cyclic convolution building block, a frequency-domain data block demodulation module, a data-guiding channel estimation module, a channel estimation post-processing module and a control module. The method and the device use hidden informationcarried by frequency-domain data sent by the OFDM system in symbol modulation, as well as initial channel estimation provided by training information, completes receiving the channel estimation of all signal frames, and can reduce complexity, improve precision and increase the utilization ratio of frequency spectrum, mobile performance and other effects.

Description

Technical field [0001] The invention belongs to the technical field of digital information transmission, and particularly relates to a data-guided channel estimation method and an implementation device for an OFDM block transmission technology system in a wireless communication system. The OFDM block transmission technology includes a variety of OFDM block modulation technologies, guard interval filling technology, training information carrying technology and symbol modulation technology. Background technique [0002] Broadband wireless transmission must face ISI (Inter Symbol Interference) or frequency selective fading introduced by multipath effects. OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology can reliably achieve high-rate transmission in frequency selective fading channels, and has been widely used in wireless LANs, fixed wireless access, digital audio and video broadcasting, etc. Communication system. OFDM technolo...

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): H04L25/02H04L27/26
Inventor 彭克武杨昉潘长勇杨知行宋健
Owner TSINGHUA UNIV
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