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Hybrid Time-Frequency Domain Equalization Method

A technology of time domain equalization and frequency domain equalization, applied in the field of optical communication

Active Publication Date: 2017-09-26
徐林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, no one uses SC-FDE in the field of visible light communication. The combined use of SC-FDE and time domain equalization to improve the communication quality of visible light communication has not yet appeared in the industry.

Method used

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0047] The first embodiment of the present invention relates to a method for hybrid time-frequency domain equalization. Contains the following steps:

[0048] At the signal receiving end of the visible light communication system, Fourier transform FFT is performed on the received signal to obtain a frequency domain signal;

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Abstract

The invention relates to the field of optical communication, and discloses a mixed time-frequency domain balancing method. At a signal receiving end of a visible light communication system, FFT is carried out on a received signal to obtain a frequency domain signal, post-FDE processing is carried out on the frequency domain signal to obtain a frequency domain balancing signal, IFFT is carried out on the frequency domain balancing signal to obtain a time domain signal, and time domain balancing processing is carried out on the time domain signal to obtain a mixed time-frequency domain balancing signal. Compared with the prior art, the method can achieve the same communication quality with less sequences and less filter orders.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a hybrid time-frequency domain equalization method in the field of visible light communication. Background technique [0002] White light-emitting diodes (LEDs) are now widely used in lighting, and due to their advantages of high efficiency, low price and long life, white light LEDs are expected to gradually replace existing light sources for lighting, such as incandescent lamps and fluorescent lamps. White light LED also has the advantages of good modulation performance and high response sensitivity. By using this characteristic of white light LED, the signal can also be modulated to the visible light emitted by the LED for transmission. The characteristic that white LED can combine lighting and data transmission has promoted the development of a new type of wireless communication technology, that is, visible light communication (Visible Light Communication, VLC) technology....

Claims

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Application Information

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IPC IPC(8): H04L25/03H04B10/116
Inventor 徐林
Owner 徐林
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