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Phase noise compensation device and method and receiver

A phase noise compensation and phase noise technology, applied in the fields of receivers, phase noise compensation devices and methods, can solve problems such as phase noise sensitivity, achieve the effects of accurately estimating phase noise and ensuring transmission efficiency and performance

Active Publication Date: 2019-11-15
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Complex QAM modulation formats are particularly sensitive to phase noise

Method used

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  • Phase noise compensation device and method and receiver
  • Phase noise compensation device and method and receiver
  • Phase noise compensation device and method and receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An embodiment of the present invention provides a phase noise compensation device, and the phase noise compensation device is arranged at a receiver end of an optical communication system. figure 1 is a schematic diagram of the phase noise compensation device according to Embodiment 1 of the present invention. Such as figure 1 As shown, the device 100 includes:

[0026] A first determination unit 101, configured to determine an estimated value of an unideal parameter of a transmitter according to a received signal;

[0027] The second determination unit 102 is configured to determine the correction signal according to the estimated value of the unideal parameter of the transmitter and the training sequence signal inserted into the transmission signal of the transmitter;

[0028] A third determining unit 103, configured to determine the phase noise of the received signal according to the modified signal; and

[0029] The compensation unit 104 is configured to perform ...

Embodiment 2

[0070] An embodiment of the present invention also provides a receiver, which includes the phase noise compensation device according to Embodiment 1. The specific structure and functions of the phase noise compensation device can refer to the description in Embodiment 1, and will not be repeated here. .

[0071] Figure 5 It is a schematic block diagram of the system configuration of the receiver according to Embodiment 2 of the present invention. Such as Figure 5 As shown, the receiver 500 includes: an equalization unit 501, a frequency offset compensation unit 502, a phase noise compensation unit 503, a transmitter imperfect compensation unit 504, a first determination unit 505, a second determination unit 506, a third determination unit 507 and A bit error rate calculation unit 508 .

[0072] In this embodiment, the specific structures and functions of the equalization unit 501 , the frequency offset compensation unit 502 , the transmitter imperfect compensation unit 50...

Embodiment 3

[0078] An embodiment of the present invention also provides a phase noise compensation method, which corresponds to the phase noise compensation device in Embodiment 1.

[0079] Figure 6 is a schematic diagram of a phase noise compensation method according to Embodiment 3 of the present invention. Such as Figure 6 As shown, the method includes:

[0080] Step 601: Determine the estimated value of the unideal parameter of the transmitter according to the received signal;

[0081] Step 602: Determine the correction signal according to the estimated value of the unideal parameter of the transmitter and the training sequence signal inserted into the transmitted signal of the transmitter;

[0082] Step 603: Determine the phase noise of the received signal according to the modified signal; and

[0083] Step 604: Perform phase noise compensation on the received signal according to the phase noise of the received signal.

[0084] Figure 7 is another schematic diagram of the ph...

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Abstract

The embodiment of the invention provides a phase noise compensation device, a phase noise compensation method and a receiver. The method comprises steps of determining a correction signal according tothe estimated value of the non-ideal parameter of the transmitter and the training sequence signal in the transmitted signal; and determining the phase noise of the received signal according to the correction signal, so that the influence of the non-ideal transmitter on the phase noise is considered, the phase noise can be accurately estimated, the phase noise can be effectively compensated, andthe transmission efficiency and performance of the system are ensured.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a phase noise compensation device and method, and a receiver. Background technique [0002] The coherent optical communication system occupies an important position in the communication transmission network due to the advantages of huge transmission bandwidth, great expansion potential, extremely low transmission loss and low cost. To build a coherent optical communication network with low cost, large capacity, and high spectral efficiency, choosing a suitable modulation format is the key. In recent years, as the most effective way to increase the transmission rate, flexible and variable modulation formats have rapidly become a focus of attention, and high-order quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation) has become the mainstream solution for next-generation optical communication systems. The complex QAM modulation format is particularl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/61
CPCH04B10/6165H03D3/005H04L27/3809H03D3/242H04L2027/0038H04L27/2275
Inventor 宿晓飞陶振宁
Owner FUJITSU LTD
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