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

Method of mapping chips of a spread out symbol to sub-channels of a multi-carrier transmission network

A technology of transmission channel and transmission network, which is applied in the direction of transmission path sub-channel allocation, shaping network in transmitter/receiver, transmission system, etc.

Inactive Publication Date: 2010-06-16
MITSUBISHI ELECTRIC CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this paper, the proposed mapping is not optimal when large anticorrelations may occur for some subchannels mapped to consecutive chips of the spreading code

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 of mapping chips of a spread out symbol to sub-channels of a multi-carrier transmission network
  • Method of mapping chips of a spread out symbol to sub-channels of a multi-carrier transmission network
  • Method of mapping chips of a spread out symbol to sub-channels of a multi-carrier transmission network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] In a multi-carrier transmission network, such as an MC-CDMA transmission network or an OFCDM transmission network, there is usually one base station and several mobile stations. The base station assigns a spreading sequence to each mobile station (hereinafter referred to as a user). When said base stations or users have to transmit data items, they map spreading code chips onto subchannels of a subchannel group of a multicarrier transmission network.

[0042] The invention consists in mapping spreading code chips to subchannels in order to maximize the correlation between subchannels mapped to consecutive chips.

[0043] figure 1 is a block diagram of a multi-carrier transmission network transmitter.

[0044] The transmitter 10 of the multicarrier transmission network is an example of a base station transmission unit.

[0045] The transmitter 10 transmits data to k users. The transmitter 10 includes a numbered 11 1 to 11 k k multipliers. Each multiplier 11 spreads...

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 present invention concerns a method of mapping chips of a spread out symbol to sub-channels of a group of sub-channels of a Multi-Carrier transmission channel of a Multi-Carrier transmission network, the spread out symbol being formed by multiplying a data item to be transmitted by elements of a spreading sequence, the mapped chips being further modulated using an orthogonal frequency divisionmultiplexing modulation, each sub-channel of the Multi-Carrier transmission channel being defined by a carrier frequency of the Multi-Carrier transmission channel and a time slot wherein an orthogonal frequency division multiplexing symbol is transmitted, characterised in that the chips are ordered in a predetermined order, the first chip is mapped to a sub-channel and each following chips are mapped to a sub-channel which has the same carrier frequency or the same time slot as the sub-channel of which the previous chip has been mapped to. The method concerns also a method the de-mapping andassociated devices.

Description

technical field [0001] The invention relates to a method for mapping spreading code chips to sub-channels of a sub-channel group in a multi-carrier transmission network. Background technique [0002] In multicarrier transmission networks that use spreading sequences to multiply data items to be transmitted, such as multicarrier code division multiple access transmission networks (which are more familiarly known as MC-CDMA transmission networks), or orthogonal frequency division and Code division multiplexing transmission network (it is more familiar name is OFCDM transmission network), in the transmission network, before orthogonal frequency division code division multiplexing modulation and transmission, the L chip is mapped to the multi-carrier transmission network L subchannels, each spreading code of said L chips is formed by multiplying a data item to be transmitted by L elements of said spreading sequence. [0003] OFCDM and MC-CDMA transmission networks use orthogona...

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): H04J13/02H04J11/00H04B1/69H04L5/02H04L25/03H04L27/26
CPCH04B1/692H04L27/2608H04L5/026H04L2025/03414H04L5/0044
Inventor D·莫捷
Owner MITSUBISHI ELECTRIC CORP
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