Supercharge Your Innovation With Domain-Expert AI Agents!

Wireless communication method based on orthogonal frequency division multiplexing physical layer network encoding communication system power distribution technology

A technology of orthogonal frequency division and network coding, which is applied in the field of communication and can solve the problems of low throughput of wireless communication methods.

Active Publication Date: 2013-06-12
HARBIN INST OF TECH
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of low throughput of the existing wireless communication method based on physical layer network coding communication system, the present invention proposes a wireless communication method based on orthogonal frequency division multiplexing physical layer network coding communication system power allocation technology

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
  • Wireless communication method based on orthogonal frequency division multiplexing physical layer network encoding communication system power distribution technology
  • Wireless communication method based on orthogonal frequency division multiplexing physical layer network encoding communication system power distribution technology
  • Wireless communication method based on orthogonal frequency division multiplexing physical layer network encoding communication system power distribution technology

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0055] Specific implementation mode one, combination figure 2 , image 3 In this embodiment, the wireless communication method based on the power allocation technology of the physical layer network coding communication system of orthogonal frequency division multiplexing described in this embodiment is described. In this method, both the source node and the relay node use N c The communication channel is a flat multipath fading channel. The number of channel multipaths is L, and L is an integer greater than or equal to 1. The delay between two adjacent paths is one symbol period; the channel coefficient is in the frequency division Orthogonal multiplexing-the physical layer network coded communication remains unchanged in two time slots; N c Is a positive integer;

[0056] The channel between the source node 1 and the relay node is expressed as

[0057] h 1 ( t ) = X l = 0 L - 1 h 1 , l δ ( t - l )

[0058] Where h 1 ...

specific Embodiment approach 2

[0119] Specific embodiment two, this embodiment is a further description of the wireless communication method based on the power allocation technology of the physical layer network coding communication system of orthogonal frequency division multiplexing described in specific embodiment one. The source node and the second source node get N c The method of power allocation for the frequency domain constellation symbol signal is:

[0120] Step A1: Obtain channel information through channel estimation;

[0121] Step A2. According to the water injection theorem, calculate the power allocated by the system to the nth subcarrier of the first source node, the power allocated by the system to the nth subcarrier of the second source node, and the power allocated by the system to the n subcarriers of the relay node The sum

[0122] Step A3. According to the channel information obtained in step A1 and the power allocated to the nth subcarrier of the first source node calculated by the system i...

specific Embodiment approach 3

[0123] Embodiment 3 This embodiment is a further explanation of the wireless communication method of the physical layer network coding communication system power allocation technology based on orthogonal frequency division multiplexing described in Embodiment 1. The relay described in step 13 N obtained by node pair c The methods for respectively performing power allocation on the frequency domain symbol signals after the channel constellation mapping are:

[0124] Step B1: Obtain channel information through channel estimation;

[0125] Step B2. Calculate the power allocated to the nth subcarrier of the first source node by the system, the power allocated to the nth subcarrier of the second source node by the system, and the power allocated to the n subcarriers of the relay node by the system according to the water injection theorem. with;

[0126] Step B3, according to the channel information obtained in step B1, and the power allocated to the nth subcarrier of the first source nod...

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 provides a wireless communication method based on an orthogonal frequency division multiplexing physical layer network encoding communication system power distribution technology, relates to the field of communication, and solves the problem that the existing wireless communication method based on the physical layer network encoding communication system is small in throughout capacity. The wireless communication method is carried out through two timeslots: in the first timeslot, constellation mapping is carried out for the data input by two signal source node pairs; power is distributed, inverse fast Fourier transform is carried out, a cyclic prefix is added to send to a relay node, the relay node performs cyclic prefix removing for the received mixed signal, fast Fourier transform is carried out, the mapping is judged to obtain broadcast data; and in the second timeslot, the relay node performs constellation mapping for the broadcast data, power is distributed, inverse fast Fourier transform is carried out, a cyclic prefix is added and the obtained signal is broadcast, the two signal source nodes receive the broadcast signal to perform cyclic prefix removing, fast Fourier transform is carried out, and operations such as demapping are carried out to finish communication between the two signal source nodes. The wireless communication method provided by the invention is suitable for wireless communication.

Description

Technical field [0001] The present invention relates to the field of communication, in particular to a wireless communication method of the power allocation technology of a physical layer network coding communication system. Background technique [0002] With the advent of the information age, people have put forward higher requirements for wireless cellular communication systems. Users hope that the system can not only provide high-speed data transmission services for mobile terminals in the cell, but also ensure the service quality of cell edge terminals. Among them, wireless relay transmission systems are currently an important research direction. The wireless relay turns the one-hop transmission between the base station and the mobile terminal into a multi-hop transmission, reduces the transmission power in the wireless transmission, and effectively improves the system performance, especially the quality of service for cell edge users. [0003] As a typical wireless relay tran...

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): H04L27/26H04L1/00
Inventor 于启月罗德巳孟维晓
Owner HARBIN INST OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com