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

Method and system for wireless channel measurement based on wavelet decomposition threshold de-nosing

A wavelet decomposition and wireless channel technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as impulse response errors

Inactive Publication Date: 2012-07-18
BEIJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, traditional wireless channel measurement ignores the interference introduced by noise and sliding correlation, which causes a certain error between the measurement result and the actual channel impulse response, and this error has a negative effect on the subsequent channel parameter extraction and channel modeling. varying degrees of influence

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
  • Method and system for wireless channel measurement based on wavelet decomposition threshold de-nosing
  • Method and system for wireless channel measurement based on wavelet decomposition threshold de-nosing
  • Method and system for wireless channel measurement based on wavelet decomposition threshold de-nosing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention provides a method and a device for wireless channel measurement based on wavelet decomposition threshold denoising, which are applied to wireless channel measurement, reduce the interference of noise on channel impulse response, improve the accuracy and validity of channel measurement results, and provide the basis for follow-up The study of channel characteristics provides a reliable data basis.

[0030] The present invention will be described in detail below with reference to the accompanying drawings.

[0031] like figure 1 As shown, the PN sequence generator at the transmitting end generates a pseudo-random sequence code with a fixed code length and code rate required for the measurement, and then undergoes BPSK modulation, up-conversion to the measurement frequency and transmits; the receiving end and the transmitting end complete the clock synchronization, and receive the signal After down-conversion and filtering, it is converted into an in...

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 method and a system for wireless channel measurement based on wavelet decomposition threshold de-nosing. The method includes the following steps: (1) using a spread spectrum sliding correlation method to finish wireless channel measurement so as to obtain channel impulse response containing noise, (2) conducting multi-resolution wavelet decomposition for the channel impulse response and leading the channel impulse response to be converted from time domain to wavelet domain, (3) reasonably selecting a threshold function and a threshold and processing wavelet coefficients corresponding to the noise according to the threshold function; (4) conducting wavelet reconstruction and leading the de-noised channel impulse response to be converted from the wavelet domain back to the time domain, and (5) storing the de-noised channel impulse response for researching channel characteristics. Through steps of wavelet decomposition, threshold de-nosing, wavelet reconstruction and the like, the method and the system can reduce interference on the channel impulse response caused by the noise, improve accuracy and effectiveness of channel measurement results, and provide reliable data basis for follow-up researching of channel characteristics.

Description

technical field [0001] The present invention relates to the field of wireless mobile communication, in particular to a method and device for wireless channel measurement based on wavelet decomposition threshold denoising. Background technique [0002] Wireless channel is a key factor affecting the performance of wireless mobile communication system. The characteristics of wireless channels in space-time correlation, frequency selectivity and many other aspects pose challenges to the design of mobile communication systems. Therefore, the study of wireless channel propagation characteristics is the premise and key to the study of new mobile communication technologies. [0003] The best way to understand the real channel characteristics is to measure the wireless channel in various actual geographical environments, and it is widely used by countries all over the world. Commonly used wireless channel measurement methods include direct pulse measurement, frequency domain channe...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/345
Inventor 赵敏武穆清于得水贾贵源徐春秀郭起霖胡骞郭嵩王婷婷贺媛郑倩倩邹鹏张殿宝张皎
Owner BEIJING UNIV OF POSTS & TELECOMM
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