Differential 8-phase shift keying (D8PSK)/amplitude shift keying (ASK) orthogonal light label switching method and system based on differential biphasic codes

A differential biphase and differential coding technology, applied in the field of optical communication, can solve the problems of low modulation extinction ratio, high implementation difficulty, complicated design and operation, etc., and achieve the effect of improving system performance and improving modulation extinction ratio.

Inactive Publication Date: 2011-06-29
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the disadvantages of the existing orthogonal optical label switching system, such as complex design and operation, low bandwidth utilization rate, low modulation extinction ratio, and high difficu...

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  • Differential 8-phase shift keying (D8PSK)/amplitude shift keying (ASK) orthogonal light label switching method and system based on differential biphasic codes
  • Differential 8-phase shift keying (D8PSK)/amplitude shift keying (ASK) orthogonal light label switching method and system based on differential biphasic codes
  • Differential 8-phase shift keying (D8PSK)/amplitude shift keying (ASK) orthogonal light label switching method and system based on differential biphasic codes

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Embodiment Construction

[0064] figure 1 It is a flow chart of the optical label switching method based on the D8PSK / ASK quadrature modulation of the differential biphase code in the present invention. Combine now figure 1 , the inventive method is described, specifically as follows:

[0065] Step 11: Load the payload (Payload) in the optical packet data to the phase of the optical carrier through the differential eight-level phase shift keying modulation method to generate a differential eight-level phase shift keying signal (D8PSK: Differential 8-Level Phase-Shift Keying) .

[0066] In this step, the method of using the D8PSK modulation method to load the load onto the optical carrier phase includes:

[0067] Step 111: Perform serial-to-parallel conversion of the load in the optical packet data through a Field-Programmable Gate Array (FPGA: Field-Programmable Gate Array) chip, and convert a serial signal with a rate of τ into three channels with a rate of τ / 3 parallel signals, τ is the bit rate...

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Abstract

The invention relates to a differential 8-phase shift keying (D8PSK)/amplitude shift keying (ASK) orthogonal light label switching method based on differential biphasic codes, which is characterized in that loads in light group data are subjected to serial-to-parallel conversion to form three-path signals, and the three-path signals are respectively loaded to three phase-modulators for phase modulation after being subjected to differential precoding so as to generate D8PSK signals. Compared with an existing binary transfer system, the capacity of a system provided by the invention is three times of that of the binary transfer system; and label information in the light group data is loaded to the D8PSK signals by using a differential biphase encoding in an ASK mode so as to generate the D8PSK/ASK orthogonal modulating signals based on the differential biphasic codes. Differential biphasic code signals can be used to effectively improve the modulation extinction ratio of the orthogonal signals and strengthen the system performances.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a method and system for D8PSK / ASK orthogonal optical label switching based on differential biphase codes. Background technique [0002] With the informationization process of society, the demand for communication bandwidth is constantly increasing. In particular, the rapid growth of services mainly characterized by IP poses a more severe challenge to bandwidth requirements, and the emergence of wavelength division multiplexing (WDM) technology for carrying IP services (IP over WDM) provides a solution to this challenge. An ideal solution. [0003] The application of wavelength division multiplexing technology enables multiple wavelength channels to be accommodated in a single optical fiber, the transmission capacity has been greatly improved, and the problem of all-optical transmission has been basically solved. On the switching level, there is an inherent "electronic bottl...

Claims

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Application Information

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IPC IPC(8): H04L27/34H04L1/00H04Q11/00H04B10/12H04L12/56H04B10/548
Inventor 忻向军张丽佳张琦王拥军尹霄丽赵同刚马建新饶岚张晓磊刘博张星边绍松原全新刘皎
Owner BEIJING UNIV OF POSTS & TELECOMM
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