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Synchronisation process in optical frequency division multiplexing transmission systems

一种码元同步、接收部分的技术，应用在信号传输领域，能够解决未考虑实时发送实际DSP硬件精确度和速度等问题

Inactive Publication Date: 2012-09-19
UNIV OF WALES BANGOR
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Such an offline signal processing approach does not take into account the limitations imposed by the accuracy and speed of the actual DSP hardware required to guarantee real-time delivery

Method used

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  • Synchronisation process in optical frequency division multiplexing transmission systems
  • Synchronisation process in optical frequency division multiplexing transmission systems
  • Synchronisation process in optical frequency division multiplexing transmission systems

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Embodiment Construction

[0052] The present invention discloses such as figure 1 The symbol synchronization method in the receiving part of represented OOFDM transceiver, it comprises the steps:

[0053] a) From serial to parallel, convert the input real valued sample (real valued sample) into two groups of OFDM symbols, one of which contains the original copy of the symbol (original copy), and the other contains the symbol's time Delayed copy (time-delayed copy);

[0054] b) performing a first subtraction between the sample of the original copy of the symbol at position x and the sample of the delayed copy at position x+N-L, where N is the total number of samples and L is the length of the cyclic prefix;

[0055] c) store the absolute value of the subtraction in position x of the synchronization register;

[0056] d) Perform the next subtraction operation between the sample of the original copy of the symbol at position x+1 and the sample of its time-delayed copy (counterpart) at position x+1+N-L; ...

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Abstract

The present invention discloses a synchronisation method suitable for increasing the receiving speed in the receiving part of an orthogonal optical frequency division multiplexing (OOFDM) transceiver.

Description

technical field [0001] The present invention relates to the field of signal transmission using Optical Orthogonal Frequency Division Multiplexing (OOFDM) transceivers and synchronization methods for improved receive processing. Background technique [0002] As e.g. presented by Jolley et al. (N.E. Jolley, H. Kee, R. Richard, J. Tang, K. Cordina, in the National Fiber Optical Fiber Engineers Conf., Anaheim, CA, 2005 3 It is well known to use optical orthogonal frequency division multiplexing (OFDM) modulation techniques to reduce optical mode dispersion in multimode fiber (MMF) transmission links. It offers the advantages of strong resistance to dispersion impairment, efficient use of channel spectrum characteristics, cost-effective due to full use of mature digital signal processing (DSP), dynamic provision of hybrid bandwidth allocation in frequency and time domains, and significant reduction in optical network complexity . [0003] It can also be advantageously used as f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2662H04L27/2678H04L27/2697H04J14/00H04L27/26
Inventor 唐建明金显庆
Owner UNIV OF WALES BANGOR
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