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Method and equipment for duplex communication in mixed optical fiber-radio system

一种无线系统、双工通信的技术，应用在光纤无线电、波分复用系统、多路复用通信等方向，能够解决困难第三方法应用双工通信等问题

Inactive Publication Date: 2003-11-05
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

Therefore, it is difficult to apply the third method to duplex communication

Method used

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  • Method and equipment for duplex communication in mixed optical fiber-radio system
  • Method and equipment for duplex communication in mixed optical fiber-radio system
  • Method and equipment for duplex communication in mixed optical fiber-radio system

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Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] figure 1is a diagram of a central station in a fiber optic wireless hybrid system for duplex communication. The central station includes a master laser 12 and a slave laser 16 . The radio frequency source unit 11 generates an intermediate frequency radio frequency. It is connected to the master laser 12 and uses direct regulation to modulate the master laser diode. Here, the optical signal output from the master laser 12 is applied to the diode of the slave laser through the routing operation of the optical circulator 17, thereby modulating the laser diode. The mixer 15 mixes the modulated signal output from the QPSK (Quadrature Phase Shift Keying) modulator 14 and the signal generated by the local oscillator 13 . QPSK is a digital frequency modulation technique in which the two bits 0 and 1 of a digital signal are packed and then trans...

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Abstract

An apparatus and method for duplex communication by generating optical millimeter wave signals in a hybrid fiber-wireless system. Instead of a high-frequency local oscillator, non-data-mode signals are separated from the signal generated in the remote base station by applying intense light emitted by the master laser to the slave laser to lock on to the signal from the slave laser, and then using an intermediate-frequency local oscillator to shift the signal , so that it is reused as a signal source for uplink signal transmission. When the optical millimeter / micrometer wave is transmitted in the optical fiber radio transmission system, the surrounding side modes generated by using two lasers and an inexpensive intermediate frequency local oscillator are separated and then converted into an upstream signal. Duplex communication can be achieved by using the upstream signal. accomplish. Economies are gained by using splitters instead of expensive high frequency mixers or local oscillators.

Description

technical field [0001] The present invention relates to a method and apparatus for allowing duplex communication by generating optical millimeter wave signals in a hybrid fiber-radio system. Background technique [0002] Due to the increasing depletion of existing radio frequency resources due to the heavy use of the Internet for moving picture services and growth in wireless access, there is an increasing need for fourth generation wireless communications to provide improved broadband services. Accordingly, millimeter wave communication using frequencies in the range of 30-300 GHz, once developed in limited fields such as military and satellite fields, has now been researched and developed as a broadband communication system in a multi-mode. [0003] Even for communication using millimeter wave signals, it is preferable that the basic communication network employs wired communication through optical fibers since the basic communication network must function as a communicati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00H04B10/508H04B10/548H04B10/58H04J14/00H04J14/02
CPCH04B10/25752H04B10/25H04B10/2575
Inventor 金娥正
Owner SAMSUNG ELECTRONICS CO LTD
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