FSK demodulator, related equipment and method

A technology for demodulator and signal modulation, applied in FM carrier systems, electrical components, circuit devices, etc., can solve the problems of complex FSK demodulation methods, poor anti-interference ability, complex circuit structure, etc., and achieve simple and efficient implementation process, The effect of accurate dynamic statistical value and simple circuit structure

Active Publication Date: 2019-11-12
MAXIC TECHNOLOGY CORPORATION
View PDF13 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the frequency of the transmitting end of the wireless charging system of the QI standard is switched between the operating frequency Fop and the modulation frequency Fmod, and the difference between the two frequencies is characterized by the two parameters of the polarity attribute and the depth attribute, therefore, in the During FSK demodulation, it is usually necessary to judge the polarity attribute of the modulated signal, and to support all the depth attributes of the modulated signal, which makes the existing FSK demodulation method complex and difficult to implement
Moreover, in the prior art, the analog demodulation method is usually used, the structure of the circuit is relatively complicated, and the anti-interference ability is poor.

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
  • FSK demodulator, related equipment and method
  • FSK demodulator, related equipment and method
  • FSK demodulator, related equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0044] The embodiment of the present invention provides a kind of FSK demodulator, refer to figure 1 shown, including:

[0045] The sampling module 101 is used to perform multiple frequency sampling on the FSK modulation signal according to the preset sampling cycle number by using a preset sampling frequency during the FSK start-up phase, and determine the average sampling value of the working frequency corresponding to the multiple...

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 an FSK decoder, equipment and a decoding method, and the FSK decoder comprises a sampling module which is used for employing a preset sampling frequency at an FSK starting stage, carrying out the frequency sampling of an FSK modulation signal for many times according to a preset sampling period number, and determining a working frequency average sampling value correspondingto the frequency sampling for many times; a level recovery module which is used in an FSK communication stage and used for performing frequency sampling on the FSK modulation signal in real time according to a preset sampling period number by adopting the preset sampling frequency to obtain a signal frequency dynamic statistical value of each time of frequency sampling, and obtaining a level signal according to an absolute value of a difference value between the signal frequency dynamic statistical value and the working frequency average sampling value; and a level decoding module which is used for counting the number of cycles from each time of level edge change to the next time of level edge change in the level signal, matching the number of cycles with a preset cycle threshold range, and determining a corresponding bit value. The FSK decoder is accurate in processing result and easy to implement.

Description

technical field [0001] The invention relates to the field of wireless charging, in particular to an FSK demodulator, a wireless charging receiving end device and an FSK demodulation method. Background technique [0002] FSK (Frequency-shift keying, frequency-shift keying) is a modulation and demodulation method that uses different frequencies to represent different corresponding information symbols. In the prior art, for the wireless charging system of the QI standard proposed by the International Wireless Power Consortium (WPC), FSK modulation and demodulation are used to realize signal communication. Since the frequency of the transmitting end of the wireless charging system of the QI standard is switched between the operating frequency Fop and the modulation frequency Fmod, and the difference between the two frequencies is characterized by the two parameters of the polarity attribute and the depth attribute, therefore, in the FSK demodulation usually needs to judge the p...

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): H04L27/14H02J50/80
CPCH04L27/14H02J50/80
Inventor 郦文其郭越勇
Owner MAXIC TECHNOLOGY CORPORATION
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