Light signal to noise ratio monitoring device, signaling device and receiver

一种光信噪比、接收信号的技术，应用在通信领域，能够解决OSNR估计值偏低等问题，达到准确估计、计算过程简单、应用范围广的效果

Inactive Publication Date: 2017-04-19
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual OSNR monitoring, if the noise introduced by nonlinear effects cannot be ruled out, the estimated value of OSNR will be low

Method used

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  • Light signal to noise ratio monitoring device, signaling device and receiver
  • Light signal to noise ratio monitoring device, signaling device and receiver
  • Light signal to noise ratio monitoring device, signaling device and receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An embodiment of the present invention provides an optical signal-to-noise ratio monitoring device, and the optical signal-to-noise ratio monitoring device can be used at a receiving end of a communication system. figure 1 It is a schematic composition diagram of the optical signal-to-noise ratio monitoring device of Embodiment 1 of the present invention. Such as figure 1 As shown, the device 100 includes:

[0032] The selection unit 101 is configured to select a phase noise area and / or a polarization crosstalk area in the received signal for calculating noise power based on the positions of the pilot signals in the received signal of the first polarization state and the second polarization state;

[0033] The first calculation unit 102 is configured to calculate the noise power of the received signal of the first polarization state and the second polarization state in the selected phase noise region and / or polarization crosstalk region;

[0034] The second calculatio...

Embodiment 2

[0086] An embodiment of the present invention also provides a signal sending device, which can be used at a transmitting end of a communication system. Image 6 is a schematic diagram of the composition of the signal sending device according to Embodiment 2 of the present invention. Such as Image 6 As shown, the device 600 includes: a sending unit 601, wherein,

[0087] The sending unit 601 is configured to respectively send signals including pilot signals on the first polarization state and the second polarization state, wherein the pilot signals in the signals sent on the first polarization state and the second polarization state have different powers .

[0088] In this embodiment, the method for sending a signal by the sending unit 601 is the same as that described in Embodiment 1. For example, the sending unit 601 may determine the power of the pilot signal in the signal sent on the first polarization state and the second polarization state according to the constellati...

Embodiment 3

[0091] The embodiment of the present invention also provides a receiver, Figure 7 is a schematic diagram of the composition of the receiver of this embodiment. Such as Figure 7 As shown, the receiver 700 includes an OSNR monitoring device 701. The structure and function of the OSNR monitoring device 701 are the same as those described in Embodiment 1, and will not be repeated here.

[0092] Figure 8 It is a schematic block diagram of the system configuration of the receiver according to Embodiment 3 of the present invention. Such as Figure 8 As shown, the receiver 800 includes:

[0093] The function of the front end is to convert the input optical signal into baseband signals in two polarization states. In the embodiment of the present invention, the two polarization states may include H polarization state and V polarization state.

[0094] Such as Figure 8 As shown, the front end includes: local oscillator laser 810, optical mixer (Optical 90deg hybrid) 801, photod...

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PUM

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Abstract

The embodiment of the invention provides a light signal to noise ratio monitoring device, a signaling device and a receiver; according to noise power and pilot signal power of a received signal on different polarization states, the white noise power of the received signal can be calculated, thus removing non-linear noise influences, and accurately estimating the light signal to noise ratio; the calculation process is simple and the application scope is wide.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an optical signal-to-noise ratio monitoring device, a signal sending device and a receiver. Background technique [0002] Optical Signal Noise Ratio (OSNR) is a quantity that can be directly related to system performance, whether it is in the traditional direct detection optical communication system or in the coherent optical communication system, so OSNR monitoring Technology research has been widely concerned. [0003] Traditional measurement methods defined based on OSNR rely on the conditions that the noise power spectrum is flat and there is a frequency band in the spectrum that contains only noise but no signal. With the improvement of optical communication capacity, the transmission length and transmission rate of coherent optical communication systems have been greatly improved compared to before. More optical nodes will lead to greater fluctuations in the shape o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/079
CPCH04B10/07953H04B10/0775H04B10/07951H04B10/516H04B10/541H04B10/564H04B2210/075H04J14/06H04J14/08H04L5/0048
Inventor 窦亮陶振宁
Owner FUJITSU LTD
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