Optical fiber transmission system based on ultra-short wave radio set

Abstract

The present invention relates to an optical fiber transmission system based on an ultra-short wave radio set. The system comprises an emission access and a receiving access which are mainly formed bya near-end host, a far-end amplifier and an optical fiber transmission module being in bridge connection between the near-end host and the far-end amplifier. The optical fiber transmission system doesnot need to change the original structure of an ultra-short wave radio set, is independent of hardware platform performances and is simple and rapid to implement. The near-end host is configured to perform sampling and processing of intermediate frequency information of the ultra-short wave radio set and combine the intermediate frequency information to combine data frames for sending through a photoelectric converter. The received photoelectric signals are employed to analyze the data frames, and the intermediate frequency information is returned to the ultra-short wave radio set. The far-end amplifier is configured to process radio frequency information received by an antenna to combine control signals to form data frames for sending through the photoelectric converter, and received photoelectric signals are employed to analyze the data frames to generate intermediate frequency information through a digital frequency synthesizer, and the intermediate frequency information is processed and sent by a radio frequency module. The optical fiber transmission system based on the ultra-short wave radio set is implemented based on an Xilinx FPGA processor to meet a design demand by employing few resources and a high processing speed.

Description

technical field [0001] The present invention relates to the technical field of ultrashort wave communication, in particular to an optical fiber transmission system based on an ultrashort wave radio station. In the system, the ultrashort wave radio station transmits and receives intermediate frequency signals at a sampling rate of 384KHz, and the optical fiber transmission rate is 110.592MHz. Four channels with a phase difference of π / 4 sampling clock for data recovery, the baseband signal bandwidth is 64KHz. Background technique [0002] Due to the high frequency of the ultrashort wave itself (30-300MHz), the transmission characteristics are fundamentally different from other transmission methods. The sky waves emitted generally penetrate the ionosphere and shoot into space, but cannot be reflected back to the ground by the ionosphere. Therefore, the ultrashort wave communication system is mainly Rely on direct space propagation. For complex terrains such as mountainous mo...

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Problems solved by technology

[0004] 1. The vehicle-mounted system ensures the mobility of transmission, but it cannot overcome the complex terrain of mountains, mountains and urban high-rise buildings;

[0005] 2. The piggyback system ensures transmission reliability, but is limited by labor costs and transmission power, so it cannot be widely used;

[0006] 3. The position system ensures the stability of the transmission, and the lack of cable transmission is often used, the attenuation is too large, and the cost is too high

[0007] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

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