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Method for achieving asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) based on discrete cosine transform (DCT)

A discrete cosine transform, digital-to-analog conversion technology, applied in the field of high-speed optical communication, can solve the problem of no deterioration of transmission performance

Inactive Publication Date: 2014-12-03
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

But the transmission performance does not deteriorate

Method used

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  • Method for achieving asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) based on discrete cosine transform (DCT)
  • Method for achieving asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) based on discrete cosine transform (DCT)
  • Method for achieving asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) based on discrete cosine transform (DCT)

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Embodiment Construction

[0012] figure 1 It is an ACO-FOFDM block diagram based on discrete cosine variation, where the formulas of IDCT and DCT are defined as:

[0013] x n = 2 N Σ k = 0 N - 1 W k X k cos ( π ( 2 n + 1 ) k 2 N ) , 0 ≤ n ≤ N - 1 - - - ( 1 ) ...

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Abstract

The invention relates to a method for achieving asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) based on discrete cosine transform (DCT), and belongs to the technical field of optical communication. ACO-OFDM based on DCT is ACO-FOFDM. Due to the fact that DCT is real transmission and is used for achieving multi-carrier multiplexing and demultiplexing, the algorithm complexity is lower than that of traditional fast Fourier transform, and Hermitian conjugate is not needed. Thus, the method has the advantage of the low implementation complexity and is suitable for systems with high cost requirements and high implementation complexity requirements, such as passive optical networks and interconnection systems for indoor optical wireless communication and data centers.

Description

technical field [0001] The invention belongs to the field of high-speed optical communication, in particular to a method for realizing asymmetric truncated optical orthogonal frequency division multiplexing. Background technique [0002] With the development of Internet technology and the vigorous development of various video services, the capacity requirements of optical transmission and access systems are also increasing. In order to meet the ever-increasing capacity requirements of optical transmission systems, optical OFDM (O-OFDM) technology has been extensively studied in recent years. O-OFDM technology has the advantages of high spectral efficiency, strong ability to resist dispersion and polarization mode dispersion, etc. O-OFDM technology is divided into two categories: coherent OFDM system and intensity modulation-direct detection OFDM (IM / DD O-OFDM) system. Among them, the IM / DD O-OFDM system has a simple structure and low implementation cost, and is suitable fo...

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Application Information

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IPC IPC(8): H04L27/26H04Q11/00
Inventor 乔耀军周骥蔡浞纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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