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Transmitter and receiver, transceiver and system for twdm-pon

A technology of TWDM-PON and transmitter, which is applied in the field of passive optical network, can solve problems such as insufficient, high cost of photoelectric equipment, and enhance RF video signal transmission performance, so as to save cost and reduce Raman crosstalk

Active Publication Date: 2019-07-16
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
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Problems solved by technology

However, the bandwidth consumed by Miller encoding is twice that of traditional Non Return Zero (NRZ) data, which makes the cost of optoelectronic equipment very high
In addition, according to the results reported in Ref. 2, Miller coding can only reduce Raman crosstalk by about 10dB at most, which is not enough to suppress Raman crosstalk and enhance the transmission performance of RF video signals

Method used

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  • Transmitter and receiver, transceiver and system for twdm-pon
  • Transmitter and receiver, transceiver and system for twdm-pon
  • Transmitter and receiver, transceiver and system for twdm-pon

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Embodiment Construction

[0024] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0025] The present invention discloses a novel method and device for alleviating Raman scattering crosstalk in a system where RF video is superimposed on TWDM-PON. The PSD of the TWDM-PON signal is shaped so that the PSD of the TWDM-PON signal in the low frequency region is significantly reduced without changing the traditional RF video transceiver.

[0026] figure 1 A schematic diagram of a transmitter 10 for TWDM-PON including a Modified...

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Abstract

The invention provides a transmitter, a receiver and a transceiver for TWDM-PON and a system of RF video overlapping TWDM-PON. The transmitter is used in the system of the RF video overlapping TWDM-PON; the transmitter comprises an MDB encoder and a switch unit; the MDB encoder is configured to shape a TWDM-PON signal in order to reduce PSD of a low frequency portion of the TWDM-PON signal; the switch unit is configured to conduct the MDB encoder in order to perform MDB encoding on the TWDM-PON signal when the system comprises an RF video signal and to disconnect the MDB encoder in order to make the TWDM-PON signal bypass the MDB encoder when the system does not comprise the EF video signal.

Description

technical field [0001] The present invention relates generally to Passive Optical Networks (PON), and more particularly to transmitters and receivers for TWDM-PON, transceivers comprising such transmitters and receivers, and devices comprising such transceivers Overlay system. Background technique [0002] Recently, Time and Wavelength Division Multiplexed Passive Optical Network (TWDM-PON) has been selected by Full Service Access Network (FSAN) as the next generation passive optical network (NG-PON2) A primary bandwidth solution characterized by an aggregate downstream capacity of at least 40Gb / s and an upstream aggregate capacity of 10Gb / s by combining multiple pairs of wavelengths. In order to be compatible with the traditional PON system, the downlink and uplink wavelengths of the TWDM-PON system are allocated in the L+ frequency band (1596nm-1603nm wavelength) and the C-band (1524nm-1544nm wavelength) respectively. As an additional requirement, TWDM-PON systems also n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2537
Inventor 高震森张凯宾
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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