Method for resource allocation in synergetic OFDM system

A technology of resource allocation and orthogonal frequency division, applied in the field of OFDM cooperative communication, can solve the problems of not considering various information feedback and interaction of resource allocation, not considering the acquisition of channel state information, unable to apply the actual system, etc., to reduce the complexity of implementation. The effect of high degree, wide application range and low complexity

Inactive Publication Date: 2010-06-02
PLA UNIV OF SCI & TECH +1
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for better use over different types of communication systems by considering factors like frequency reuse efficiency (FRE) between cells/subnets and how data transmission rates are affected during these choices. It improves overall performance while reducing complexity when combined together.

Problems solved by technology

The technical problem addressed in this patented text is finding effective ways to efficiently utilize limited radio bandwidths while avoiding overlapping signals between adjacent base stations when transmitting simultaneously across all available carriers within a shared spectrum. This helps reduce interference among neighboring devices and improves overall efficiency of the device's own cellular network.

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 for resource allocation in synergetic OFDM system
  • Method for resource allocation in synergetic OFDM system
  • Method for resource allocation in synergetic OFDM system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] see figure 1 , the method system of the present invention is provided with a user and a base station, and a positive integer number of relays (R 1 , R 2 ,...,R K ), each relay has the same number of subcarriers.

[0054] see figure 2 , taking a coordinated OFDM network with a single user, 10 relays, and a single base station as an example for illustration. It is assumed that the number of sub-carriers of the OFDM system is N=1024, and 10 relays are randomly distributed between the user and the base station. The implementation process is as follows:

[0055] Step 1: Trunk Selection

[0056] a. The user sends data, and the cyclic redundancy check information needs to be added to the user's sent data, so that the base station can judge whether it is correctly decoded;

[0057] b. After receiving the transmitted data, each relay stores the data, and uses the LS (least squares) algorithm to estimate the channel coefficient h between the user and each subcarrier s，k ...

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 method aiming at the overall consideration and complexity of an uplink in a synergetic OFDM (orthogonal frequency division multiplexing) system for the resource allocation in a synergetic OFDM system. The method is characterized in that relays with the number thereof being a positive integer are arranged between a subscriber and a base station and each relay is provided with a plurality of subcarriers with the number being identical with that of the relays. The method comprises the following steps: firstly, the base station selects a relay according to the minimum equivalent signal-to-noise ratios of the subcarriers in each relay, that is, the base station selects the relay with the maximal equivalent signal-to-noise ratio of the subcarriers from the relays with the minimal equivalent signal-to-noise ratio of the subcarriers as the relay node for the subsequent synergetic transmission; then, the selected relay sequences the subcarriers between the subscriber and the selected relay and between the subscriber and the base station sequentially pair the subcarriers, namely, the subcarriers of the relay with high signal-to-noise ratio are used for transmitting the data supposed to be transmitted by the subcarriers of the subscriber with high signal-to-noise ratio; and finally, the base station carries out the water-filling power allocation on each intra-subcarrier according to the equivalent channel gain of each subcarrier pair, and starts the synergetic transmission.

Description

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

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
Owner PLA UNIV OF SCI & TECH
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