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

Non-orthogonal frequency division multiplexing data transmission method

A transmission method and frequency division multiplexing technology, which is applied in the field of non-orthogonal frequency division multiplexing data transmission and transmission, can solve the problems of high system complexity and impracticality

Active Publication Date: 2017-06-13
SICHUAN ENG TECHN COLLEGE
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, NMT also has its shortcomings, that is, multiple non-orthogonal subcarriers need to be generated at the transmitter and receiver, the system complexity is very high, and because each subcarrier is non-orthogonal, it is not very practical

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
  • Non-orthogonal frequency division multiplexing data transmission method
  • Non-orthogonal frequency division multiplexing data transmission method
  • Non-orthogonal frequency division multiplexing data transmission method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] see figure 2 Shown: the present invention is a kind of non-orthogonal frequency division multiplexing data transmission transmission method, and described transmission transmission method comprises:

[0024] The transmitter first divides the high-speed data stream to be sent with a symbol period of T, and divides each N into a group;

[0025] The transmitter performs serial-to-parallel conversion of each group of N transmission data, and converts the data d of N parallel outputs k , k=1,2,...,N. The N-way data d k In theory, it needs to be loaded on N non-orthogonal sub-carriers, and then synthesized together and sent out. Since these subcarriers are non-orthogonal, the frequency f of the kth subcarrier k Need to meet the constraints shown in formula (1), said formula (1) is:

[0026]

[0027] Since the N subcarriers are non-orthogonal, signals on each subcarrier will interfere with each other. The transmitter uses the following formula (2) to process the N pa...

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 non-orthogonal frequency division multiplexing data transmission method. The transmission method comprises the steps that a transmitter splits to-be-transmitted high-speed data streams of which symbol period is T, wherein every N data streams are split into a group; the transmitter carries out serial-parallel conversion on each group of split to-be-transmitted data, N ways of parallel output data dk are obtained through conversion, and scrambling operation is carried out on the N ways of parallel output data dk, thereby generating scrambled frequency domain to-be-transmitted data d<k>^caret; and the transmitter carries out IDFT (Inverse Discrete-Time Fourier Transform) on the frequency domain to-be-transmitted data d<k>^caret, thereby obtaining sent time domain sampling data S(k). According to the method, through utilization of a scrambling algorithm and IDFT combined method, the multiway signal non-orthogonal frequency division multiplexing complexity is reduced.

Description

Technical field: [0001] The invention relates to communication technology, in particular to a non-orthogonal frequency division multiplexing data transmission method. Background technique: [0002] At present, Orthogonal Frequency Division Multiplexing (OFDM) is a kind of multi-carrier modulation (Multi-Carrier Modulation, MCM), such as figure 1 The principle shown is: convert the high-speed data signal into several parallel low-speed sub-data streams, and use mutually orthogonal sub-carriers for modulation. The modulated orthogonal signals are combined and transmitted in the channel. The orthogonal signals can be transmitted in the channel. Interference-free separation is achieved at the receiving end. OFDM technology has not been paid attention to by people for quite a long period of time. This is because the system needs to generate multiple orthogonal sub-carrier signals at both the receiver and the transmitter, and the system complexity is very high. Later, people use...

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): H04L27/26
CPCH04L27/2628
Inventor 陈昌海雷刚王涛胡明华
Owner SICHUAN ENG TECHN COLLEGE
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