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Signal sending method and device, signal receiving method and device and storage medium

A technology of signal transmission and positive signal, applied in the field of receiving method, device and storage medium, signal transmission, can solve the problems of signal and delay loss, etc., to achieve the effect of no signal and delay loss

Active Publication Date: 2022-03-08
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a signal sending and receiving method, device and storage medium, which are used to solve the problem of signal and time delay loss when ensuring the non-negative characteristics of visible light signals

Method used

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  • Signal sending method and device, signal receiving method and device and storage medium
  • Signal sending method and device, signal receiving method and device and storage medium
  • Signal sending method and device, signal receiving method and device and storage medium

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Embodiment Construction

[0151] In the embodiment of the present invention, a scheme of using multiple groups of visible light transmitting units to transmit positive and negative signals separately will be proposed. Compared with the traditional method, all subcarriers can be fully utilized without loss of signal and time delay. Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0152] In the process of description, the implementation of the sending end and the receiving end will be described respectively, and then an example of the cooperation between the two will be given to better understand the implementation of the solution given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented together, or must be implemented separately. In fact, when the sending end and the receiving end are implemented separately, they also solve their own problems. When the two are used in combinat...

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Abstract

The invention discloses a signal sending method and device, a signal receiving method and device and a storage medium. The method comprises the following steps: determining a positive signal and a negative signal in a time domain signal after IFFT (Inverse Fast Fourier Transform); the first group of light emitting units is used for sending positive signals, and the second group of light emitting units is used for turning over negative signals and then sending the negative signals. The first group of light detectors receive first signals sent by the first group of light emitting units, and the second group of light detectors receive second signals sent by the second group of light emitting units; and the second signal is overturned and then superposed with the first signal, and FFT is carried out. By adopting the method and the device, the non-negative characteristic of the visible light signal is ensured, and compared with the existing scheme, all subcarriers can be fully utilized without signal and time delay loss.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a signal sending and receiving method, device and storage medium. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing), as a representative technology of multi-carrier modulation, can be effectively applied to visible light communication to realize broadband high-speed data transmission. The basic idea is to transform high-speed serial data into multiple relatively low-speed parallel data modulations and transmit them on each sub-channel. This parallel transmission system greatly expands the pulse width of symbols and improves the performance of anti-multipath fading. However, since visible light transmission generally uses an intensity modulation / direct detection mechanism, the transmitted signal is constrained by non-negative real numbers. Therefore, traditional RF OFDM methods canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/516H04B10/60H04L27/26
CPCH04B10/116H04B10/516H04B10/60H04L27/2628H04L27/265
Inventor 王菡凝夏亮董静王笑千
Owner CHINA MOBILE COMM LTD RES INST
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