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Device and method for high-speed data parallel processing at receiving end of coherent optical OFDM system

A coherent optical and data technology, applied in multi-frequency code systems, baseband system components, shaping networks in transmitters/receivers, etc. The effect of processing power

Active Publication Date: 2018-04-24
BEIJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high clock frequency and low data throughput of DSP chip when traditional OFDM is used to transmit large-scale data

Method used

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  • Device and method for high-speed data parallel processing at receiving end of coherent optical OFDM system
  • Device and method for high-speed data parallel processing at receiving end of coherent optical OFDM system
  • Device and method for high-speed data parallel processing at receiving end of coherent optical OFDM system

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Embodiment 1

[0052] Below in conjunction with specific embodiment this patent is described in detail. Apply the DSP parallel processing device and method at the receiving end of the coherent optical OFDM system proposed in this patent to the 480GbpsPM-16QAM-OFDM system. Figure 4 For the 480Gbps PM-16QAM-OFDM system, the device for parallel processing of receiving end data is adopted in the present invention, figure 2 It is a structure in which dual training symbols are used to perform parallel symbol synchronization and a judging mechanism for starting points of double-peak symbol synchronization in the embodiment. Figure 5 Algorithm flow adopted for the judging mechanism of the starting point of the double-peak symbol applied to the embodiment.

[0053] In this embodiment, the optimal number of parallel paths M is jointly determined according to the required number of dispersion compensation and the number of FFT points. M is 1024, the number of OFDM symbol subcarriers N is 128, L=N / 2...

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Abstract

The invention discloses a device and method for parallel processing of high-speed data at the receiving end of a coherent optical OFDM system: the device includes a CD rough equalization module, a parallel symbol synchronization module, a parallel FFT window module, a subsequent DSP processing module, and a data recovery module; the method Firstly, using the characteristics of dispersion compensation, the high-speed serial data stream can be reduced to the processing range of the chip clock after serial-to-parallel conversion. Secondly, by setting double training symbols and introducing a double-correlation peak judgment mechanism, synchronous parallel processing of symbols can be achieved, and fractional frequency multiplication can be completed. Partial estimation and compensation functions, and finally perform block processing on multi-channel parallel data. The device and method reduce the requirements of the high-speed optical fiber communication system on the sampling rate of the ADC / DAC and the processing speed of the DSP algorithm chip, and solve the problem that the DSP algorithm processing chip cannot meet the real-time processing requirements of the system.

Description

technical field [0001] The present invention relates to high-speed optical fiber communication, especially to the field of DSP processing at the receiving end of high-speed optical fiber communication system, in particular to digital signal processing (Digital Signal Processing, Hereinafter referred to as the background technology of parallel realization process of DSP processing. Background technique [0002] In recent years, driven by "high-definition, three-dimensional, and user-created content", the generation of massive information has led to an alarming increase in network bandwidth. By 2016, global IP traffic will reach 1300 Ai per year (10 18 )byte. According to the data released by China Telecom, the compound annual growth rate of its network transmission bandwidth exceeds 80%, and the growth rate exceeds 10 times in 5 years. The improvement of single-channel transmission capacity can not only meet the requirements of rapid growth of transmission capacity, but mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 陈雪闫峥刘耀超王邦醒王立芊张治国
Owner BEIJING UNIV OF POSTS & TELECOMM
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