A dual-band optical carrier radio frequency link system and its transmission method
A technology of optical radio frequency and link system, which is applied in the direction of optical fiber transmission, transmission system, electromagnetic wave transmission system, etc., can solve the problems of low frequency band utilization and high link cost, and achieve reduced system cost, strong operability, and improved Effect of Band Utilization
Active Publication Date: 2022-04-08
NORTHWESTERN POLYTECHNICAL UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
To realize dual-band radio frequency signals in the electrical domain, at the same time, radio frequency devices such as large-bandwidth couplers are required in the link, so the cost of the link is very high; the existing RoF link can only transmit radio frequency signals of a single frequency band, and the frequency band utilization rate is low. Low
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] A dual-band optical carrier radio frequency link system includes a laser, a dual-electrode dynamometer (DEMZM), an optical fiber, an optical power splitter, a low-speed photodetector and a high-speed photodetector; the DEMZM has parallel upper and lower arms , each arm has one RF port and one DC port; the output end of the laser source is connected to the optical input end of the DEMZM, the low frequency RF signal is input to the upper arm RF port of the DEMZM, the high frequency RF signal is input to the lower arm RF port of the DEMZM, and the DEMZM output end Connect the optical fiber and the optical power splitter in turn. One of the two output ends of the optical power splitter passes through the low-speed photodetector and then restores the original low-frequency radio frequency signal through the low-frequency electric band-pass filter. The...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a dual-band radio-frequency link system and its transmission method. The output end of the laser source is connected to the optical input end of the DEMZM, the low-frequency radio-frequency signal is input to the upper-arm radio-frequency port of the DEMZM, and the high-frequency radio-frequency signal is input to the DEMZM. The RF port of the lower arm and the DEMZM output end are connected to the optical fiber and the optical power splitter in turn. One of the two output ends of the optical power splitter passes through the low-speed photodetector and then passes through the low-frequency electric band-pass filter to restore the original low-frequency RF signal, and the other through the high-speed After the photodetector, the original high-frequency radio frequency signal is recovered through a high-frequency electric band-pass filter. The present invention multiplexes and transmits two low-frequency and high-frequency radio frequency signals on a single RoF channel, fully utilizes frequency band resources of optical fibers, and reduces system cost. The invention has a simple structure and strong operability; it meets the signal transmission requirements of applications such as 5G communication, saves physical link costs, and improves frequency band utilization.
Description
technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical carrier radio frequency link system. Background technique [0002] RF signals have large losses in the atmosphere and cables, and are not suitable for long-distance transmission. The optical fiber has the advantages of low loss, large bandwidth, no electromagnetic interference, and light weight. Therefore, the construction of a radio frequency over optical (RoF) link can realize the effective transmission of radio frequency signals through the optical fiber. [0003] In 5G communication applications, the simultaneous transmission of radio frequency signals in two frequency bands, low radio frequency and high frequency radio frequency, is a difficult problem. Dual-band RF signals are implemented in the electrical domain, and RF devices such as large-bandwidth couplers are required in the link, so the cost of the link is very high; the existing RoF l...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H04B10/25H04B10/516H04B10/548
CPCH04B10/25H04B10/516H04B10/548H04B10/0795
Inventor 高永胜徐航谭庆贵王欣悦赵雪芳樊养余
Owner NORTHWESTERN POLYTECHNICAL UNIV