A Mach-Zehnder modulator-based rof system with suppressed odd-order sidebands

A modulator and secondary side technology, applied in transmission systems, electromagnetic wave transmission systems, electromagnetic transmitters, etc., can solve the problems of no analysis of transmission performance, no analysis and comparison of modulation format results, etc., to save frequency band resources, reduce communication capacity, The effect of good application prospects

Active Publication Date: 2020-06-19
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the present invention does not analyze and compare the modulation format results, nor does it analyze the transmission performance under different radio frequency signals

Method used

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  • A Mach-Zehnder modulator-based rof system with suppressed odd-order sidebands
  • A Mach-Zehnder modulator-based rof system with suppressed odd-order sidebands
  • A Mach-Zehnder modulator-based rof system with suppressed odd-order sidebands

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Embodiment Construction

[0024] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, a ROF system based on Mach-Zehnder modulator to suppress odd-order sidebands includes: a connected wavelength division multiplexing demultiplexer 1, a wavelength division multiplexer 2, a single-mode fiber 3, and an erbium-doped fiber amplifier 4. The first filter processing module and the second filter processing module; wherein, the first filter processing module includes: a first Bessel filter 51, a first optical coherent DP PSK receiver 52, a first general digital signal Processor 53, first decision unit 54, first PSK sequence decoder 55 and first parallel-to-serial converter 56;

[0026] The second filter processing module includes: a second Bessel filter 61, a second optical coherent DP PSK receiver 62, a second general digital signal processor 63, a second decision device...

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Abstract

The invention discloses a Mach-Zehnder-modulator-based odd sideband suppression ROF system comprising a wavelength division multiplexing demultiplexer, a wavelength division multiplexer, a single-modefiber, an erbium-doped fiber amplifier, and a first filter processing module and a second filter processing module. The first filter processing module includes a first Bessel filter, a first opticalcoherent DP PSK receiver, a first general digital signal processor, a first determiner, a first PSK sequence decoder and a first parallel-to-serial converter; and the second filter processing module includes a second Bessel filter, a second optical coherent DP PSK receiver, a second general digital signal processor, a second determiner, a second PSK sequence decoder and a second parallel-to-serialconverter.

Description

technical field [0001] The invention relates to the field of optical fiber access, in particular to a Mach-Zehnder modulator-based ROF system for suppressing odd-order sidebands. Background technique [0002] Radio over Fiber (ROF) uses the characteristics of high-frequency radio waves and low-loss optical fibers to realize high-speed and large-capacity broadband transmission, and can make full use of dozens of spectrum resources. It has become the focus of many scholars in recent years. research focus. The generation technology of optical millimeter wave is one of the key technologies of ROF. Compared with single and double sideband modulation, optical carrier suppression modulation has higher bandwidth utilization and receiver sensitivity, and can avoid periodic fading, realizing system Stable transmission. In order to meet the increasing demand for large capacity of users, multi-level signals are widely used because of their high spectrum utilization and greater communi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/556H04B10/2575H04B10/50
CPCH04B10/2575H04B10/505H04B10/5561
Inventor 王建军季幸平邵宇丰
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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