A Channel Estimation and Equalization Method for Chirp Modulated Signals

A channel estimation and modulation signal technology, applied in the field of Internet of Things, can solve frequency selective fading and other problems, and achieve the effect of improving accuracy

Active Publication Date: 2021-11-05
CHONGQING UNIV OF POSTS & TELECOMM
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention is a solution to the frequency selective fading problem of broadband Chirp signals in current Internet of Things applications.

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
  • A Channel Estimation and Equalization Method for Chirp Modulated Signals
  • A Channel Estimation and Equalization Method for Chirp Modulated Signals
  • A Channel Estimation and Equalization Method for Chirp Modulated Signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0045] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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 channel estimation and equalization method for a Chirp modulated signal, belonging to the technical field of the Internet of Things. In the process of sending and receiving Chirp signals, due to the modulation characteristics of Chirp signals, the signal amplitude received by the receiver is fixed, and the time domain equalization can be completed by using automatic gain (AGC) control, but this is inconvenient for the received time domain Chirp signals are directly subjected to channel estimation and equalization. Therefore in the present invention, will at first carry out fast Fourier transform to the time domain Chirp signal that receives, transform the time domain Chirp signal into frequency domain and carry out channel estimation and equalization, this helps to solve the frequency selective fading in the wireless channel question.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Things and relates to a method for channel estimation and equalization of Chirp modulated signals. Background technique [0002] FM Spread Spectrum (Chirp Spread Spectrum, CSS) is an important spread spectrum method in spread spectrum communication. The instantaneous frequency of Chirp signal changes linearly with time within one symbol period, and has good autocorrelation characteristics, so it is a typical spread spectrum signal. Because the Chirp signal pulse compression has strong immunity to frequency offset and Doppler frequency shift, the multipath resolution is high, the peak-average power of the transmitted signal is relatively small, and the CSS communication system has strong anti-interference ability, and is resistant to frequency offset, Due to its insensitivity to Doppler frequency shift, low system complexity and low power consumption, it is widely used in various IoT syste...

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 Patents(China)
IPC IPC(8): H04L25/02H04L25/03
CPCH04L25/0202H04L25/0224H04L25/03012
Inventor 段红光郑建宏罗一静王月
Owner CHONGQING UNIV OF POSTS & TELECOMM
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