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A Partitioned Nonlinear Phase Noise Restoration Method

A technology of nonlinear phase and recovery method, applied in the field of optical fiber communication system, can solve the problem of inaccurate estimation of phase noise and so on

Active Publication Date: 2017-01-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in fact, the nonlinear phase noise of symbols with different amplitudes is different, so the above method cannot accurately estimate the phase noise, especially when the transmission power is relatively large and the transmission distance is relatively long, this inaccuracy is more obvious

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  • A Partitioned Nonlinear Phase Noise Restoration Method
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  • A Partitioned Nonlinear Phase Noise Restoration Method

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] see Figure 4 , Figure 4 It is a schematic flow diagram of the system in Embodiment 1 of the present invention.

[0055] Step 401: if Figure 4 As shown, the received symbols are equally divided, and the length is m. For each symbol in the symbol block, the symbol is quadrupled by using a 4th power device.

[0056] Step 402: Classify the symbol according to the magnitude of the symbol after the 4th power, that is, classify the symbol w...

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Abstract

The invention discloses a regional separation nonlinear phase noise recovery method. A single channel nonlinear schrodinger equation is utilized to deduce that the nonlinear phase noise of different amplitudes of symbols forms into a certain proportion under non-constant-modulus data modulation, the same phase deflection treatment is utilized during phase recovery of the different amplitudes of symbols in the former 16 QAM systems, and accordingly a certain error is produced during nonlinear phase noise recovery of the systems. According to the regional separation nonlinear phase noise recovery method, the complexity of the phase recovery algorithm in the 16 QAM systems is reduced and the accuracy of the nonlinear noise recovery is improved; meanwhile the nonlinear phase recovery method can be applied to a Nyquist technology adopted optical transmission system; the practicability is strong, the structure is simple, the cost is low, and the signal processing requirement is low.

Description

technical field [0001] The invention relates to a novel 16QAM nonlinear phase noise recovery method in a single carrier system, belonging to the category of optical fiber communication systems. Background technique [0002] With the rapid development of communication technology and the increasing popularity of high-definition video and multimedia applications, the amount of data transmitted on the Internet has grown rapidly in recent years. Cisco estimates that before 2012, the global Internet traffic will increase to 1 billion GB per month, more than double the current traffic, and the popularity of many online video sites will further increase. Driven by "high-definition, three-dimensional, user-generated content (UGC)", the generation of massive information has triggered the arrival of "digital deluge". In the future, human beings will generate more than 1000 exabytes of digital content every year. Under the impact of the digital flood, the traffic of the telecom backbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/36
Inventor 乔耀军李明杨秋虹纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM