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

Doubly-selective channel estimation method based on V-OFDM (Vector-Orthogonal Frequency Division Multiplexing)

A dual-selective channel, V-OFDM technology, applied in the field of channel estimation, dual-selective channel estimation based on vector orthogonal frequency division modulation, can solve the problem of not considering channel estimation and so on

Active Publication Date: 2016-05-25
ZHEJIANG UNIV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After receiving the signal and sampling, the receiving end also obtains N=P×M serial data, forms a data block with a shape of P×M in the same way as the sending end, and performs P-point discrete Fu on each column of the data block Lie transform (FFT) restores the data block affected by the channel, and then performs transform domain equalization on the data block to eliminate the channel influence. When performing transform domain equalization, channel information is required, and this scheme does not consider the method of 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
  • Doubly-selective channel estimation method based on V-OFDM (Vector-Orthogonal Frequency Division Multiplexing)
  • Doubly-selective channel estimation method based on V-OFDM (Vector-Orthogonal Frequency Division Multiplexing)
  • Doubly-selective channel estimation method based on V-OFDM (Vector-Orthogonal Frequency Division Multiplexing)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] The double selection channel estimation method based on V-OFDM that the present invention proposes specifically comprises the following steps:

[0043] (1) Determine the channel maximum possible delay spread path number 6, Doppler spread path number 5, i.e. L=5, Q=4;

[0044] (2) determine the V-OFDM data block size N=P*M=1024, P=16 is the column number of data block, M=64 is the row number of data block, and the value of P, M satisfies P≥Q+2, M>2L+1; and add pilots and pilot guard intervals in the data block, such as figure 2 As shown; the method of adding the pilot and the guard interval of the pilot is specifically: the sending end and the receiving end generate random BPSK pilot point data through the same pseudo-random number generator, a total of 64, and select the V-OFDM data block Column 1 is the pilot column, and co...

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 doubly-selective channel estimation method based on V-OFDM (Vector-Orthogonal Frequency Division Multiplexing). A way of adding pilot frequencies and pilot frequency protection intervals in V-OFDM sending data blocks is designed based on the existing V-OFDM transmission mechanism, so that perpendicularity of the pilot frequencies and the data is guaranteed. A BEM (Basis Expansion Model) channel module is utilized to carry out modelling on a channel at a receiving end and pilot frequency parts in the received V-OFDM data blocks are utilized to estimate a doubly-selective channel parameter matrix in the BEM model. In comparison with the conventional doubly-selective channel estimation and transmission scheme based on OFDM, the designed channel estimation scheme has the advantages that the estimation accuracy is improved and the complexity is reduced.

Description

technical field [0001] The invention relates to channel estimation technology in the communication field, in particular to a dual-selection channel estimation method based on vector orthogonal frequency division modulation. Background technique [0002] Wireless communication is a way of exchanging information by using electromagnetic waves to propagate in free space. At present, in the field of information communication, wireless communication develops the fastest and is most widely used. Providing reliable broadband communication services in high-speed mobile environments such as high-speed rail is a major challenge for next-generation communication systems. [0003] In wireless communication, system performance is greatly affected by the channel. Channel effects are generally divided into time or frequency selective fading and additive noise. Generally speaking, it is necessary to eliminate the influence of the channel and restore the signal sent by the sending end, an...

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): H04L25/02H04L27/26H04J11/00
CPCH04J11/00H04J2011/0003H04L25/0204H04L25/022H04L25/0242H04L25/0256H04L27/2601
Inventor 张朝阳彭朱炜付攀玉张婧杨潇翔
Owner ZHEJIANG 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