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Modulation method, modulator, demodulation method, demodulator, communication method and system

A modulation method and technology for modulating signals, applied in the field of communication, can solve the problems of low transmission efficiency of communication data and the like

Active Publication Date: 2020-12-25
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing modulation and demodulation technology makes the transmission efficiency of communication data low

Method used

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  • Modulation method, modulator, demodulation method, demodulator, communication method and system
  • Modulation method, modulator, demodulation method, demodulator, communication method and system
  • Modulation method, modulator, demodulation method, demodulator, communication method and system

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Embodiment Construction

[0054] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0055] The formula of chirp signal (Chirp signal) is as follows:

[0056]

[0057] In the formula, j is a complex unit symbol; φ(t) is the phase of Chirp signal; It is a rectangular pulse signal with an amplitude of 1 and a pulse width (or period) of T, and its specific formula is expressed as follows:

[0058]

[0059] For a chirp signal without implanted Doppler shift, its phase can be:

[0060]

[0061] Therefore, for a chirp signal without implanted Doppler frequency shift, its phase is symmetrical about t=0 and the frequency (ie, the derivative of the phase with respect to time) varies linearly with time. The chirp signal (ID-Chirp signal) impl...

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Abstract

The invention relates to the technical field of communication, and discloses a modulation method and modulator based on a linear frequency modulation signal, a demodulation method and demodulator based on the linear frequency modulation signal, a communication method and a communication system. The modulation method comprises the steps: selecting M pieces of different phase data or M different frequency data, wherein M is equal to 2L, L is a positive integer, and the phase data or the frequency data are discretized phase data or frequency data of linear frequency modulation signals implanted with Doppler frequency shift; modulating and mapping the M-ary data to the M different phase data or the M different frequency data; and generating and outputting M modulation signals corresponding tothe M-ary data according to the M different phase data or the M different frequency data. According to the invention, modulation and demodulation of multi-system data can be realized within one pulsewidth, so the transmission efficiency of communication data can be greatly improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a modulation method and modulator based on chirp signals, a demodulation method and demodulator based on chirp signals, a communication method and a communication system. Background technique [0002] From the beginning of mobile communication in the 1890s to the present, wireless communication technology has developed rapidly, which has also brought about great changes in people's lives. Due to the dependence of wireless communication on spectrum and the non-renewable characteristics of spectrum resources, with the wide application of various wireless communications, each frequency band is becoming more and more crowded, and communication interference is becoming more and more serious. In order to obtain large-capacity, high-speed, high-security, and high-reliability wireless communications, ultra-wideband spread spectrum communication technology has become an eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/38
CPCH04L27/2657H04L27/2662H04L27/2671H04L27/3854
Inventor 唐晓柯王于波丘四海胡毅李德建李铮
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY
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