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Method and system for synchronous generating radio and wire signal using double-arm modulator

A wired signal and wireless signal technology, applied in the transmission system, optical fiber radio, electromagnetic wave transmission system, etc., can solve the problems of increasing system cost and complexity, and achieve the effect of reducing input optical power, simple system structure, and cost reduction

Inactive Publication Date: 2007-12-19
HUNAN UNIV
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  • Abstract
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Problems solved by technology

However, these solutions either require high input optical power, or require precise bias control, and require cascaded modulators to complete the modulation and up-conversion of the baseband signal, which greatly increases the system cost and complexity

Method used

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  • Method and system for synchronous generating radio and wire signal using double-arm modulator
  • Method and system for synchronous generating radio and wire signal using double-arm modulator
  • Method and system for synchronous generating radio and wire signal using double-arm modulator

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Embodiment Construction

[0052] The present invention will be described in detail below in conjunction with specific experimental examples and accompanying drawings.

[0053] As shown in FIG. 1, the components of the optical millimeter wave and baseband signal generation module 12 are described as follows:

[0054] The laser 1 is used to generate a single longitudinal mode optical signal of a specified wavelength, which can be a DFB-LD; the dual-arm optical intensity modulator 2 is used to generate a double-sideband modulation signal, which can be lithium niobate (LiNbO 3 )Modulator. The two driving signals of the modulator 2 in this embodiment example: one is the data signal generated by the wired data signal source 5 of 10Gb / s, and the other is mixed with the radio frequency sinusoidal signal by the wireless data signal generated by the wireless data signal source 55 to carry out the uplink The frequency conversion is carried on the subcarrier, and then used to drive the modulator 2. The mixer 4 i...

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Abstract

This invention discloses a method for generating radio signals and wire baseband at the same time by a double-arm modulator and a single-wavelength light source in a radio-on-fiber(ROF) communicastion system and a system for transmitting two kinds of signals simultaneously on a same wavelength by fiber, which utilizes a dual-webbing modulation and a optical filter theory to generate dual-webbing signals and filter ROF mm waves and baseband data signals from down link to be provided to different users, and this invented system is not only used in single-channel ROF system but also used in WDM ROF system.

Description

(1) Technical field [0001] The invention belongs to the technical field of a radio-over-fiber (Radio-over-Fiber, abbreviated as ROF) communication system, and can simultaneously provide wired services and wireless services. (2) Background technology [0002] Wireless and broadband are hot spots in today's communication industry and even the entire information industry. In today's information society, there is an increasingly urgent need for multimedia communications including voice, data, and images. People hope that these communication services can be provided to individuals (no matter where the person is) at any time. Wireless communication enables people to communicate with anyone anytime and anywhere, and broadband communication can transmit data, Internet, voice, video and multimedia applications to business and home users. The combination of the two has undoubtedly become the development direction of communication. [0003] However, in recent years, due to the underut...

Claims

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Application Information

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IPC IPC(8): H04B10/12H04B10/155G02F1/00H04B10/2575
Inventor 余建军陈林
Owner HUNAN UNIV
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