Pulse interval modulation and demodulation method based on wireless ultraviolet light communication

A technology of pulse interval modulation and demodulation method, applied in free space transmission, electrical components, electromagnetic wave transmission system and other directions, can solve the problems of poor channel capacity, high bandwidth requirement, variable symbol length, etc., the principle and method are simple and easy to achieve Achieving a simple effect
CN110278027BActive Publication Date: 2022-02-22西安标普信息科技有限公司
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
西安标普信息科技有限公司
Publication Date
2022-02-22

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a pulse interval modulation and demodulation method based on wireless ultraviolet light communication. The modulation method: first define the order of the modulation information, and then define the first two digits of the code of the modulation signal as a single high pulse "1" and a single empty protection time gap "0"; then compare d with 2 M‑1 The size relationship, if d<2 M‑1 , the source information first adds d information empty time slots, then adds the identification pulse "10" and an empty time slot "0", and then adds 2 M‑1 ‑d empty slots; if d≥2 M‑1 , first add 2 to the source information M ‑d‑1 information empty time slot, plus identification pulse "110" and a guard time slot, followed by 2 M‑1 +d-2 M empty time slot; demodulation method: first perform photoelectric conversion, then judge the identification pulse, and then complete demodulation and decoding. The present invention solves the problems of poor anti-interference ability and low power utilization rate of the existing OOK; solves the problem of difficult realization of time slot or frame synchronization in PPM; and solves the problems of DPIM symbol indeterminate length and modulation symbol overflow or waiting.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of wireless communication, and in particular relates to a pulse interval modulation and demodulation method based on wireless ultraviolet light communication. Background technique

[0002] With the exploration of wireless optical communication by researchers, a new type of wireless ultraviolet light communication technology was discovered, which can realize direct-view and non-direct-view communication, and solve the problem of high alignment of receiving and sending ends in traditional communication methods. And gradually become a research hotspot. Modulation and demodulation technology in wireless ultraviolet communication has a great influence on the quality of communication. The application of modulation and demodulation technology can reduce bit errors and improve the error performance and communication quality of the system.

[0003] The modulation and demodulation methods in ultraviolet light communi...

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