Discrete Fourier Transform Extended Orthogonal Time-Frequency-Space Modulation Method and System

A discrete Fourier and modulation method technology, applied in the field of discrete Fourier transform extended quadrature time-frequency air modulation methods and systems, can solve the problems of reducing the peak-to-average power ratio of the transmitted signal and the high peak-to-average power of the transmitted waveform, and achieves the The effect of improving power amplifier efficiency, improving robustness, and reducing peak-to-average power ratio

Active Publication Date: 2022-04-08
SHANGHAI JIAOTONG UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the peak-average power of the transmitted waveform of the existing OTFS modulation method is relatively high, and proposes a discrete Fourier transform extended orthogonal time-frequency-space modulation method, which can be compared with the existing waveform OFDM and DFT-s-OFDM It can reduce the peak-to-average power ratio of the transmitted signal while reducing the bit error rate under the high Doppler spread channel

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
  • Discrete Fourier Transform Extended Orthogonal Time-Frequency-Space Modulation Method and System
  • Discrete Fourier Transform Extended Orthogonal Time-Frequency-Space Modulation Method and System
  • Discrete Fourier Transform Extended Orthogonal Time-Frequency-Space Modulation Method and System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Such as figure 1 As shown, this embodiment relates to a discrete Fourier transform extended orthogonal time-frequency space communication system, including: a DFT precoding unit, a delay-Doppler domain mapping unit, an OTFS modulator, an OTFS demodulator, a time Delay Doppler domain equalizer, delay Doppler domain demapping unit and IDFT decoding unit, wherein: DFT precoding unit is connected with delay Doppler domain mapping unit and transmits DFT precoded delay Doppler domain Signal, the delay-Doppler domain mapping unit is connected with the OTFS modulator and transmits the mapped delay-Doppler domain modulation signal. The OTFS modulator generates a time-domain transmission signal and connects to the wireless channel and transmits the signal. The receiving end receives the signal Afterwards, the received signal in the delay Doppler domain is obtained through the OTFS demodulator, and the transmitted signal in the delay Doppler domain is restored through the delay Do...

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

A discrete Fourier transform extended orthogonal time-frequency-space modulation method, the digital baseband signal is firstly processed by DFT precoding and delay-Doppler domain mapping, and then input to the OTFS modulator for transmission and reception, and the received signal is timed Extend Doppler domain inverse mapping processing and IDFT decoding processing to realize modulation and demodulation. Compared with the existing waveform OFDM and DFT-s-OFDM, the present invention can reduce the bit error rate under the high Doppler spread channel and at the same time reduce the peak-to-average power ratio of the transmitted signal.

Description

technical field [0001] The present invention relates to a technology in the field of terahertz communication, in particular to a discrete Fourier transform extended orthogonal time-frequency-space modulation method and system for millimeter wave and terahertz wireless communication. Background technique [0002] Existing Orthogonal Frequency Division Multiplexing (OFDM) and Discrete Fourier Transform (DFT) Spread OFDM (DFT-s-OFDM), are not robust to fast time-varying channels with high Doppler spread, which Inter-carrier interference (ICI) may result and severely degrade link performance. As the carrier frequency increases, the Doppler spreading effect becomes more severe in the THz band compared to the microwave band. If the waveform parameters in the current commercial mobile system are maintained in the THz mobile communication system, the data rate and bit error rate (BER) performance will be seriously deteriorated. Secondly, when the operating frequency increases, the...

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): H04L27/26H04B10/90
CPCH04L27/2614H04L27/2628H04B10/90H04L27/2639H04L27/2636H04L27/2634H04L27/26532H04L27/26526H04L27/26524H04L1/0612H04L1/0042H04L27/01
Inventor 韩充吴永知
Owner SHANGHAI JIAOTONG UNIV
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