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Method for generating and transmitting multi-wave signal in light carrier radio communication system

A wireless communication over light and multi-band technology, applied in the field of optical communication, can solve the problems of fading system performance, complex signal processing, and increased configuration costs, and achieve the effects of simple signal processing, avoiding mutual interference, and reducing configuration costs

Inactive Publication Date: 2007-12-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the signal processing in the electrical domain of this scheme is more complicated, the resistance noise is larger, and the multi-band signals will affect each other during the modulation process, thus degrading the performance of the system
Moreover, in this solution, a high-frequency millimeter-wave signal source and a high-speed modulator are required, which greatly increases the configuration cost of the system

Method used

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  • Method for generating and transmitting multi-wave signal in light carrier radio communication system
  • Method for generating and transmitting multi-wave signal in light carrier radio communication system

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Embodiment Construction

[0020] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0021] As shown in Figure 1, it is a schematic diagram of the present invention, a subcarrier signal and a baseband data signal respectively drive two radio frequency input terminals of a standard dual-parallel Mach-Zehnder modulator, and the dual-parallel Mach-Zehnder modulator is composed of a main Mach-Zehnder modulator A Zender modulator and two parallel and identical first sub-modulators and second sub-modulators on its two arms. The first sub-modulator is biased at the lowest point of the first sub-modulator to generate an optical subcarrier signal suppressed by...

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Abstract

This invention relates to a method for generating and transmitting signals of multiple bands in the optical carrier radio communication system including: applying a standard double parallel Mach Mr modulator and a standard single-arm Mach Mr modulator, in which, the double-parallel modulator is driven by sub-carrier and baseband data, the single arm one is driven by RF signals and baseband data, optical microwave signal and millimeter signal are got on the optical carrier by an optical carrier suppression technology and flexible spectrum shift and separated by an optical filter and converted photoelectrically to get signals of baseband, microwave and millimeter wave on the electric field.

Description

technical field [0001] The invention relates to a method in the technical field of optical communication, specifically, a method for generating and transmitting multi-band signals in an optical wireless communication system. Background technique [0002] Wireless communication over optical fiber is an emerging technology. It mainly combines the two major technologies of optical fiber and wireless communication, and uses the characteristics of low loss and high bandwidth of optical fiber to improve the bandwidth and mobility of wireless access network, and provide users with "anytime, anywhere , any business” wireless access service. Compared with the traditional wireless system, the optical wireless communication system has the advantages of wider cellular coverage, higher bandwidth, lower configuration cost, lower power consumption and easy installation. At the same time, in future optical communications, it is also necessary to use optical fiber technology to transmit bro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04B7/00H04B10/2575
Inventor 昌庆江苏翼凯
Owner SHANGHAI JIAO TONG UNIV
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