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

Coherent demodulation method and device suitable for pi/4-DQPSK (Differential Quadrature Phase Shift Keying) and readable storage medium

A technology of coherent demodulation and multiplication, applied in the field of mobile and satellite communications, which can solve the problems of demodulation performance deterioration and spectral distortion.

Active Publication Date: 2021-09-14
南京天际易达通信技术有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, the embodiment of the present invention proposes a coherent demodulation method, device, and readable storage medium suitable for π / 4-DQPSK, which solves the problem of receiving and demodulating π / 4-DQPSK modulated signals in the prior art due to spectrum The problem of spectral distortion caused by the large envelope waveguide, and the problem of overcoming the degradation of demodulation performance caused by the increase of frequency difference

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
  • Coherent demodulation method and device suitable for pi/4-DQPSK (Differential Quadrature Phase Shift Keying) and readable storage medium
  • Coherent demodulation method and device suitable for pi/4-DQPSK (Differential Quadrature Phase Shift Keying) and readable storage medium
  • Coherent demodulation method and device suitable for pi/4-DQPSK (Differential Quadrature Phase Shift Keying) and readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Next, the technical scheme in the present application embodiment will be described in the present application, and it is understood that the described embodiments are intended to be described herein, not all of the embodiments of the present application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative labor, are the scope of the present application.

[0034] The present application specification, drawings, and terms appearing in the claims, "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, comprising a series of steps or modules process, method, system, or device or unit is not limited to the listed steps, but optionally further comprises the step or unit is not listed, or alternatively further comprising for such process, method, article, or device-specific steps or other units. In addition, the terms "first", "second" and "thi...

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 discloses a coherent demodulation method and device suitable for Pi / 4-DQPSK and a readable storage medium. The method comprises the steps: receiving sampling processing, two-path demodulation judgment and carrier loop tracking, receiving a Pi / 4-DQPSK modulation radio frequency signal from a transmitting end; performing I-path demodulation processing and Q-path demodulation processing on the digital intermediate-frequency signal by using an orthogonal local carrier wave, combining a result obtained by multiplying in-phase pi / 4 phase integer multiples in the I-path demodulation processing with a result obtained by multiplying orthogonal pi / 4 phase integer multiples in the Q-path demodulation processing for phase error detection; through loop filtering, tracking, regulating and controlling local carriers. According to the method, the envelope fluctuation of the modulation signal can be reduced, the demodulation method realizes demodulation conversion of the pi / 4-DQPSK modulation signal and effectively demodulates information through a full-digital processing mode. Meanwhile, the method also has good carrier tracking capability and good anti-noise characteristic.

Description

Technical field [0001] The present application relates to mobile communications and satellite technologies, and in particular, to a suitable π / 4-DQPSK coherent demodulation method, and apparatus-readable storage medium. Background technique [0002] In mobile communications and satellite communications art, the modulation scheme selection signal to the signal transmission channel characteristics adapted to obtain a modulated signal suitable for transmission channel. In the prior art, the maximum phase modulation QPSK signal will jump to [pi], the spectral envelope fluctuations, easily lead to non-linear amplification generated spectral distortion. [0003] In addition, QPSK modulation signal in the received carrier synchronization process, with the frequency difference increases, the deterioration of the demodulation performance impact is more serious. Accordingly, improved methods and the reception signal modulation, to reduce and eliminate the demodulation performance deterio...

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
IPC IPC(8): H04L27/227
CPCH04L27/2273H04L27/227
Inventor 聂晟昱李志强
Owner 南京天际易达通信技术有限公司
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