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

Data transmission method, sending site and receiving site based on OFDM (orthogonal frequency division multiple access)

A data transmission method and technology for receiving sites, which are applied to digital transmission systems, transmission systems, and multiple use of transmission paths, can solve problems such as increasing equipment costs, and achieve the goal of avoiding interference, reducing hardware implementation costs, and improving spectrum utilization. Effect

Active Publication Date: 2016-04-06
BEIJING NUFRONT MOBILE MULTIMEDIA TECH
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the wireless local area network system, if the multiple access method of OFDMA is used in order to improve the spectrum efficiency, the equipment cost will be increased.

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
  • Data transmission method, sending site and receiving site based on OFDM (orthogonal frequency division multiple access)
  • Data transmission method, sending site and receiving site based on OFDM (orthogonal frequency division multiple access)
  • Data transmission method, sending site and receiving site based on OFDM (orthogonal frequency division multiple access)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

...

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 data transmission method based on OFDM for transmitting data from J sending sites to one receiving site at the same time; J is positive integer; the method comprises that: the receiving site divides usable frequency band into N basic sub frequency bands, the J sending sites dispatch respectively exclusive Mj basic sub frequency bands, j is an element of a set [1, J] and is a positive integer, and the formula indicating the relationship between Mj and N is as shown in the specification; the J sending sites respectively carry out IFFT (inverse fast fourier transform) treatment to respectively transmitted OFDM data, the Jth sending site carries out IFFT treatment with length of MjxK point to the data, the sampling rate is Mjxfs; the J sending sites respectively modulate the IFFT treated data, the jth sending site modulates the data to Mj basic sub frequency bands; the J sending sites sends the data on respectively exclusive Mj basic sub frequency bands; the receiving site receives the data sent by the J sending sites within the range of the N basic sub frequency bands at the same time, carries out FFT (fast fourier transform) treatment of NxK point, the sampling rate is Nxfs. The method allows bandwidth non-equivalence communication and allows simultaneous access of a plurality of users.

Description

[0001] This application is a divisional application of the parent application with an application date of March 23, 2012, an application number of 201280012991.4, and an invention title of "An OFDM-based data transmission method and transmission site". technical field [0002] The present invention relates to the technical field of wireless communication, in particular to an OFDM-based data transmission method and system. Background technique [0003] In the wireless local area network (WLAN) technology based on 802.11 series standards, multi-user transmission is realized through Carrier Sense Multiple Access (CSMA, Carrier Sense Multiple Access), that is, multiple stations (STA) cannot access the access point (CAP) at the same time, only Time-division access, even if the CAP has idle spectrum resources, STAs cannot use them. For example, in an 802.11n system, the CAP can occupy 40MHz bandwidth resources and can be divided into two 20MHz subbands. The STA can only use the en...

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): H04L5/00H04L5/14H04W72/12H04W99/00
CPCH04L5/0091H04L5/0096H04L5/1469H04W99/00H04W28/06H04W48/08H04W72/54
Inventor 鲍东山雷俊刘慎发
Owner BEIJING NUFRONT MOBILE MULTIMEDIA TECH
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