Partial symmetric extension discrete Fourier transform-based channel estimation method

A discrete Fourier and symmetric expansion technology, applied in baseband system components, multi-frequency code systems, etc., can solve the problems of edge subcarrier performance deterioration, and achieve the effect of improving performance deterioration and improving performance

Inactive Publication Date: 2011-08-03
SOUTHEAST UNIV
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The present invention proposes a channel estimation method based on partially symmetric extended discrete Fourier transform, which solves the problem o...

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
  • Partial symmetric extension discrete Fourier transform-based channel estimation method
  • Partial symmetric extension discrete Fourier transform-based channel estimation method
  • Partial symmetric extension discrete Fourier transform-based channel estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The channel estimation method based on partially symmetric extended discrete Fourier transform of the present invention includes: first, performing initial least squares (Least Square, LS) channel estimation on the frequency domain received signal on the pilot subcarrier to obtain the initial LS Channel parameter estimation; second, carry out partial symmetric extension to the initial LS channel parameter estimate; third, perform inverse discrete Fourier transform (Inverse DiscreteFourier Transform, Inverse DiscreteFourier Transform, IDFT) to obtain an equivalent channel parameter estimate in the transform domain; fourth, filter the equivalent channel parameter estimate in the transform domain to obtain a more accurate channel estimate; fifth, filter the Perform discrete Fourier (Discrete Fourier Transform, DFT) transform on the equivalent channel parameter estimation in the transform domain to obtain frequency domain channel estimation; sixth, perform inverse expansion ...

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 partial symmetric extension discrete Fourier transform-based channel estimation method, which comprises the following steps of: performing primary least square (LS) channel estimation on a frequency domain received signal on a preamble sub-carrier to obtain a primary LS channel parameter estimate; performing partial symmetric extension on the primary LS channel parameterestimate; performing inverse discrete Fourier transform (IDFT) of a corresponding point number on the LS channel parameter estimate subjected to the partial symmetric extension to obtain an intra-transform domain equivalent channel parameter estimate; performing filtering processing on the intra-transform domain equivalent channel parameter estimate to obtain a more accurate channel parameter estimate; performing discrete Fourier transform (DFT) on the filtered intra-transform domain equivalent channel parameter estimate to obtain a frequency domain channel estimate of a partial symmetric extension sequence; performing inverse extension on the frequency domain channel estimate of the partial symmetric extension sequence to obtain a channel estimate at the preamble sub-carrier; and performing row interpolation on the channel estimate at the preamble sub-carrier to obtain the frequency domain channel estimates at all sub-carriers.

Description

technical field [0001] The present invention relates to an Orthogonal Frequency Division Multiplexing (OFDM) broadband mobile communication system using a pilot, in particular to a wireless signal processing method for a wireless communication receiving end. Background technique [0002] OFDM technology has been adopted as a key link technology by various wireless transmission standards because of its high transmission bandwidth, high transmission efficiency and effective resistance to multipath fading. In the Long Term Evolution) standard, the OFDM technology is also adopted as a downlink transmission scheme. Coherent reception in OFDM systems requires accurate channel information. The method of obtaining the channel response on the pilot subcarrier by inserting the known pilot on the fixed subcarrier of the OFDM symbol, and obtaining the channel response on the non-pilot subcarrier by subsequent interpolation is called pilot-assisted channel Estimation method. In actual...

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): H04L27/26H04L25/02
Inventor 巴特尔仲文范晓骏江彬李振王亮刘远龙陈桐
Owner SOUTHEAST UNIV
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