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

Orthogonal-matching-pursuit-based sparse channel estimation method

A technology of orthogonal matching pursuit and sparse channel, which is applied in the field of sparse channel estimation based on orthogonal matching pursuit, can solve the problems of large pilot overhead and complex calculation, and achieve the effect of reducing complexity

Active Publication Date: 2011-11-16
SHENZHEN NAT ENG LAB OF DIGITAL TELEVISION
View PDF4 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a sparse channel estimation method based on orthogonal matching pursuit to solve the technical problems of large pilot overhead and complicated calculation in existing channel estimation methods

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
  • Orthogonal-matching-pursuit-based sparse channel estimation method
  • Orthogonal-matching-pursuit-based sparse channel estimation method
  • Orthogonal-matching-pursuit-based sparse channel estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention fully considers the sparse characteristics of the channel, utilizes the good sparse approximation and easy-to-implement advantages of solving linear equations with the orthogonal matching pursuit algorithm, and provides a new channel estimation method, which can effectively reduce the channel estimation cost. complexity, and can accurately estimate the position and magnitude of each path.

[0035] Orthogonal matching pursuit algorithm is a greedy (greedy) algorithm, which can obtain the sparse approximate solution of linear equations. In recent years, the orthogonal matching pursuit algorithm has been applied to restore and reconstruct the signal (see "Signal Recovery from Random Measurements via Orthogonal Matching Pursuits", published in IEEE Transactions on Information Theory, vol.53, Dec.2007, pp.4655 -4666).

[0036] Assume that x is an input column vector signal (unknown) with a length of N, and its sparsity is K (1 x 2 x N ] T In (T is...

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 an orthogonal-matching-pursuit-based sparse channel estimation method, which comprises the following steps of: taking an input vector signal as a channel impulse response sequence, constructing a measurement matrix by utilizing a know input training sequence, and constructing a sparse channel impulse response model for recovering and reconstructing the input vector signal by receiving a vector signal; and estimating the position and amplitude of each channel by adopting an orthogonal matching pursuit algorithm to obtain a channel estimation value. In the method, the precision and anti-interference performance of channel parameter estimation can be effectively improved because the orthogonal matching pursuit algorithm is easy to realize and high in proximity; and the sparseness of the channels is taken into account and iteration is performed for relatively fewer times by adopting the orthogonal matching pursuit algorithm to estimate the position and amplitude of a plurality of sparse channels, so that the complexity of a channel estimation method can be effectively reduced.

Description

technical field [0001] The present invention relates to a channel estimation method, in particular to a sparse channel estimation method based on orthogonal matching pursuit. Background technique [0002] The channel is the transmission medium of the signal, which can be divided into two types: wired channel and wireless channel. When the signal propagates in the wireless channel, the received signal is usually a distorted signal. In addition to the signal containing the direct path, it also includes reflection, diffraction and scattering signals arriving on different paths. This phenomenon is called multipath propagation. . In most practical wireless channels, such as high-definition digital TV broadcasting and broadband wireless mobile communications, the number of these paths is small compared to the number of data symbol periods of the delay spread, and the interval between adjacent paths is at least a few data symbol periods Therefore, the multipath channel is also ca...

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 万波陈燕生田浦延
Owner SHENZHEN NAT ENG LAB OF DIGITAL TELEVISION
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