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Radio Frequency Signal Phase Stable Transmission Method and System

A radio frequency signal, stable phase transmission technology, applied in the field of microwave photonics, to achieve the effect of low system cost, easy implementation, and simple structure

Active Publication Date: 2016-05-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing radio frequency signal phase-stable transmission technology, and provide a radio frequency signal phase-stable transmission method and system with lower system complexity, lower implementation cost and stronger compatibility

Method used

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  • Radio Frequency Signal Phase Stable Transmission Method and System

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Embodiment Construction

[0010] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0011] The basic idea of ​​the present invention is: the phase jitter of the radio frequency signal transmitted sequentially through the three cores of the same multi-core optical fiber after the triple frequency of the radio frequency signal transmitted through one core of the multi-core optical fiber has the same phase jitter, and the above two radio frequency The signal is mixed to eliminate the phase jitter introduced by the signal during transmission. Specifically, the method adopted in the present invention is as follows: the sending end performs photoelectric modulation after dividing the frequency of the radio frequency signal to be transmitted by two, and transmits the modulated optical signal to the receiving end through the first core of the multi-core optical fiber; the receiving end The received modulated optical signal is divided into two ...

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Abstract

The invention discloses a radio-frequency signal stable-phase transmission method and belongs to the technical field of microwave photonics. A transmitting terminal divides the frequency of radio-frequency signals needing to be transmitted into two frequencies and then conducts photoelectric modulation, and modulated photo-signals are transmitted to a receiving terminal through a first fiber core of a multi-core optical fiber; the receiving terminal divides the received modulated photo-signals into two parts, wherein one part of the photo-signals are transmitted to the transmitting terminal through a second fiber core of the modulated multi-core optical fiber and then transmitted to the receiving terminal through a third fiber core of the multi-core optical fiber, demodulation is conducted on the part of modulated photo-signals, so that first radio-frequency signals are obtained, and demodulation and frequency tripling are conducted on the other part of the modulated photo-signals, so that second radio-frequency signals are obtained; frequency mixing is conducted on the first radio frequency signals and the second radio frequency signals, filtering is conducted on the frequency-mixed signals through a band-pass filter with the band-pass center frequency identical to that of the radio-frequency signals needing to be transmitted, and down-conversion signals with a stable phase are obtained finally. The invention further discloses a radio-frequency signal stable-phase transmission system. The radio-frequency signal stable-phase transmission system is lower in complexity and implementation cost and higher in compatibility.

Description

technical field [0001] The invention relates to a signal transmission method, in particular to a radio frequency signal phase-stable transmission method and system, belonging to the technical field of microwave photonics. Background technique [0002] Phase-stable transmission technology can be used in radio astronomy, distributed synthetic aperture radar, high-precision standard clock distribution, particle accelerators and other fields, which can keep the phase of the signal stable after transmission. Traditionally, cables are used to transmit radio frequency signals. However, cables are not only lossy and heavy, but also expensive and susceptible to electromagnetic interference. They are not suitable for high-quality, long-distance radio frequency signal transmission. Optical fiber has the advantages of low transmission loss, light weight, cheap price, anti-electromagnetic interference, and large bandwidth. It is suitable for high-quality transmission of radio frequency s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/548H04B10/255H04B10/2575
Inventor 张方正魏娟潘时龙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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