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Signal processing device, and channel interval detection device, method and system

A signal processing device and channel technology, applied in the field of communication, can solve problems such as carrier channel adjacent channel crosstalk, edge channel signal distortion, etc.

Inactive Publication Date: 2017-10-31
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This uncertain change of wavelength will have a great impact on the wavelength division multiplexing optical fiber communication system, mainly reflected in: 1) adjacent channel crosstalk between subcarrier channels; 2) edge channel signals are more severely distorted

Method used

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  • Signal processing device, and channel interval detection device, method and system
  • Signal processing device, and channel interval detection device, method and system
  • Signal processing device, and channel interval detection device, method and system

Examples

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Embodiment 1

[0050] An embodiment of the present invention provides a signal processing device, which can be configured in a transmitter of a WDM optical fiber communication system, figure 2 is a schematic diagram of the device, such as figure 2 As shown, the apparatus 200 includes a loading unit 201, which loads a pilot signal on the transmitted signal, and, under a preset confidence probability, the power of the pilot signal is higher than that of all frequency points in the preset frequency range The power is greater than the first threshold.

[0051] In an implementation of this embodiment, the power of the pilot signal may be determined by the determination unit 202. In this implementation, the determination unit 202 may be based on the receiver response, the variance of the transmitted signal, the preset The frequency domain range and the preset confidence probability determine the reference power of the pilot signal, and the sum of the reference power of the pilot signal and the ...

Embodiment 2

[0069] An embodiment of the present invention provides a channel spacing detection device, which can be configured in a receiver of a WDM optical fiber communication system, Figure 4 is a schematic diagram of the device, please refer to Figure 4 , the apparatus 400 includes: a first determining unit 401 , a second determining unit 402 and a third determining unit 403 . Among them, the first determination unit 401 is used to determine the pilot frequency range of the middle channel and the pilot frequency range of the adjacent channel by using the received signal; the second determination unit 402 is used to determine the middle channel according to the pilot frequency range of the middle channel. The pilot frequency offset of the channel; determine the pilot frequency offset of the adjacent channel according to the pilot frequency range of the adjacent channel; the third determining unit 403 is used to determine the pilot frequency offset of the adjacent channel according to...

Embodiment 3

[0093] An embodiment of the present invention provides a transmitter. Figure 8 is a schematic diagram of the transmitter, such as Figure 8 As shown, the transmitter 800 includes the signal processing device described in Embodiment 1. Since the signal processing device has been described in detail in Embodiment 1, its content is incorporated here, and will not be repeated here.

[0094] Figure 9 is a schematic block diagram of the system configuration of the transmitter. like Figure 9 As shown, the transmitter 900 includes a signal generator 901 , a signal setting unit 902 , a digital-to-analog conversion unit 903 , and a modulator unit 904 .

[0095] The signal generator 901 generates a digital signal according to the transmission data; the signal setting unit 902 sets the digital signal generated by the signal generator 901 accordingly; the digital-to-analog conversion unit 903 performs digital-to-analog conversion on the digital signal; the modulator unit 904 uses th...

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PUM

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Abstract

The embodiment of the invention provides a signal processing device, and a channel interval detection device, method and system. The channel interval detection device is configured in a receiver, and comprises a first determination unit, a second determination unit and a third determination unit; the first determination unit determines the pilot frequency range of an intermediate channel and the pilot frequency range of an adjacent channel by utilizing received signals; the second determination unit determines the pilot frequency offset of the intermediate channel according to the pilot frequency range of the intermediate channel, and determines the pilot frequency offset of the adjacent channel according to the pilot frequency range of the adjacent channel; and the third determination unit determines the channel interval between the intermediate channel and the adjacent channel according to the pilot frequency offset of the intermediate channel, the pilot frequency offset of the adjacent channel and the frequency of pilot signals loaded at a transmitting end. By means of the embodiment of the invention, by utilization of the characteristics of the pilot signals applied at the transmitting end, the pilot frequency offset is estimated by adoption of a method based on frequency-domain signal processing at a receiving end; and thus, judgement on various channel intervals can be realized.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a signal processing device, a channel separation detection device, a method and a system. Background technique [0002] In a wavelength division multiplexing (WDM, Wavelength Division Multiplexing) optical fiber communication system, data of each subcarrier is modulated on several mutually independent optical carriers. Under ideal conditions, the wavelength of the laser is stable, and the channel spacing of each subcarrier is fixed. In an actual system, because the wavelength of the laser is affected by factors such as changes in the driving current, temperature fluctuations, and aging of the resonator, the wavelength of the output carrier wave drifts within a certain range. This uncertain change of wavelength will have a great impact on the wavelength division multiplexing optical fiber communication system, which is mainly reflected in: 1) adjacent channel crosst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/079H04J14/02
CPCH04B10/07957H04J14/0227H04B10/0775H04J14/0224H04L27/0014H04L2027/0028
Inventor 李慧慧赵颖陶振宁窦亮
Owner FUJITSU LTD