Multi-path channel estimation method based on all-pole model

A channel estimation and channel technology, applied in the field of information transmission, can solve the problems of inaccurate multipath channel model, inaccurate transmission signal, difficult channel decoding, etc., to achieve reduced complexity, strong anti-interference, and reduced complexity Effect

Inactive Publication Date: 2009-07-01
TSINGHUA UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the existing channel estimation methods, there are many estimations of the multipath channel model parameter A in formula (2) i with d i method, but the multipath channel model established by this method generally has probl

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
  • Multi-path channel estimation method based on all-pole model
  • Multi-path channel estimation method based on all-pole model
  • Multi-path channel estimation method based on all-pole model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] For the multipath channel model in this embodiment, its impulse response h(n) is represented by a typical method in the prior art, that is, the impulse response of the established multipath channel model is represented by a sparse representation, as shown in the formula (2) as shown:

[0051] h ( n ) = Σ i = 1 M - 1 M ≤ 20 A i δ ( n - d i ) - - - ( 2 )

[0052] In the formula (2), M is the number of paths of the multipath channel. In the e...

Embodiment 2

[0076] In this embodiment, the estimated model parameter A i with d i The main steps of the method are divided into two steps:

[0077] (1) Rough estimation of initial channel delay based on all-pole model;

[0078] (2) Based on the matching pursuit algorithm (Matching Pursuits) for multipath channel parameter A i with d i detailed estimate of .

[0079] Step (1) in this embodiment is the process of implementing the method of Embodiment 1, and the rough estimate {A of the channel is obtained in Embodiment 1 i , d i}, in order to obtain a more accurate multipath channel model, it also includes using the matching pursuit algorithm to modify the model parameters {A i , d i} The process of refinement.

[0080] The matching pursuit algorithm MP (Matching Pursuits) is an algorithm that selects some basis vectors from an extremely redundant dictionary to superimpose a specific signal. This algorithm is a specific implementation method of signal decomposition, but its essence ...

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 relates to a multipath channel estimation method based on an all-pole model, which comprises the following steps: converting an impulse response of a multipath channel from time domain to frequency domain to obtain a frequency domain response of the multipath channel; expressing the frequency domain response with an all-pole model to obtain an all-pole expression of the multipath channel model; recurring the all-pole model with the corresponding sending end data and receiving end data to obtain model parameters, and constructing an all-pole model with the model parameters; searching poles in the constructed all-pole model to obtain an initial estimated value of a multipath channel time-lag from the searched poles; and determining the impulse response of the multipath channel model according to the path number of the multipath channel and the initial estimated value of the multipath channel time-lag, and obtaining a multipath channel model. The method roughly estimates the multipath channel time-lag, which can prevent the multipath channel parameters trapping in local optimum in the subsequent refining, so as to reduce the complexity of the available multipath channel model estimation and improve the robustness, the anti-jamming property and accuracy.

Description

technical field [0001] The invention relates to the field of information transmission, in particular to a multipath channel estimation method based on an all-pole model. Background technique [0002] Channels (information channels) are signal transmission media, which can be divided into wired channels and wireless channels. Wired channels include open wires, symmetrical cables, coaxial cables, and optical cables; wireless channels include ground wave propagation, shortwave ionospheric reflection, ultrashort wave or microwave line-of-sight relays, artificial satellite relays, and various scattering channels. The signal propagates in the wireless channel, and the received signal is not only obtained through a single direct path, but also includes reflection, diffraction and data signals arriving on different paths. This phenomenon is called multipath propagation, and the channel is called multipath channel (Multi-path channel) channel). [0003] When a signal is transmitted...

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): H04L25/02
Inventor 杨林于燕斌李春艳
Owner TSINGHUA 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