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Free space optical transmission mobile communication direct amplifying station

A mobile communication base station, mobile communication technology, applied in the field of free space optical transmission mobile communication repeater, free space optical transmission mobile communication FSO relay system, can solve problems such as unsatisfactory effect, achieve fast link deployment, High bandwidth, strong security and confidentiality

Inactive Publication Date: 2004-11-10
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

It is worth noting that simple tower item amplification is often not ideal

Method used

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  • Free space optical transmission mobile communication direct amplifying station
  • Free space optical transmission mobile communication direct amplifying station
  • Free space optical transmission mobile communication direct amplifying station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] combined with figure 1 The present invention is further described.

[0021] The whole system includes near-end equipment and remote equipment. In the downlink direction, the near-end equipment of the system receives a part of the radio frequency RF signal from the air or directly couples from the base station, performs filtering, low-noise amplification, and then sends the RF signal to the infrared laser modulation Transmitter, the infrared laser modulation transmitter converts the mobile communication RF signal into a laser signal, amplifies it to the required excitation power, and modulates the modulated signal to a wavelength of 1550nm, while controlling the beam on the required narrow band , to emit light waves; the light receiving unit of the remote device communicates with the light emitting unit of the near end, and after receiving the light wave, the remote device converts the light wave into an electrical signal by the photoelectric conversion unit, and then pr...

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Abstract

The invention combines FSO (Free Space Optical) technique with mobile communication relay technique, giving full play to the characters of the two techniques, and the products can be widely applied to mobile communication network buildup and optimization. The near end device of the system modulates mobile communication downgoind signal RF to infrared laser signal and transmits the infrared laser signal, the far end device receives the infrared laser signal and then converts it to signal of mobile communication network, which can effectively extend network signal to blind area of mobile communication and solve covering problem of mobile communication. The upgoing and downgoing principles are the same. It adopts FSO technique to implement near-far end transmission in mobile communication relay system, able to avoid the disadvantages of high cost of wireless transmission, long construction cycle, difficulty in wiring, etc, eliminate limitations of isolating degree of receiving-transmitting antenna to construction and installation of a wireless cochannel transmission repeater and avoid occupying extra limited wireless frequency spectrum resources for wireless different frequency transmission.

Description

technical field [0001] The invention relates to a free space optical transmission mobile communication FSO relay system, that is, a free space optical transmission mobile communication repeater. Background technique [0002] In the construction of China's mobile communication network, the mobile communication relay system (described below using a repeater) plays an increasingly important role. The mobile communication repeaters in the network mainly include the following types: same-frequency wireless repeater, optical fiber transmission repeater, trunk amplifier, frequency shift repeater, base station extended coverage amplifier. They are described as follows: [0003] Wireless co-frequency repeater. This is the most common type of repeater. The cost of the equipment is low and easy to install, especially for relocation. It is the easiest way to fill blind spots and expand the coverage area. interference, especially in code division multiple access ...

Claims

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Application Information

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IPC IPC(8): H04B10/29
Inventor 余勋玲甘洪文
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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