Two-waveband radio frequency (RF) optical transmission module

Abstract

The invention discloses a two-waveband radio frequency (RF) optical transmission module, comprising a first directional coupler, a down converter, a first filtering module, an analog-to-digital (AD) conversion module, a first baseband processor, a first photoelectric conversion module, a wavelength division multiplexer (WDM), a second photoelectric conversion module, a second baseband processor, a digital-to-analogue (DA) conversion module, a second filtering module, an up converter, a cascade amplifying module, a third filtering module, a second directional coupler and a module monitoring unit. The optical transmission module not only has the advantages of common optical modules, but also has the capability of working in the two-waveband range, thus broadening the range of working efficiency, and solving the problem of resource waste for networking repeatedly. The optical transmission module is used for converting uplink and downlink RF signals into I / Q digital signals by AD conversion in the process of signal transmission, and then the I / Q digital signals are transmitted in the form of frame format in optical fibers by a laser, thereby greatly improving the stability of the signals in the transmission process.

Description

technical field [0001] The invention relates to a radio frequency communication device, in particular to a dual-band radio frequency optical transmission module. Background technique [0002] At present, 3G networks such as GSM, CDMA, TD-SCDMA, CDMA2000EV_DO and WCDMA will co-exist in our country for quite a long period of time. In the development of these communication systems, repeaters play a huge role. This is because the use of repeaters in mobile communication systems can economically, quickly and effectively fill blind spots, improve network quality, and bring considerable economic benefits to operators. benefit. The RF optical module undertakes the core function of the optical fiber repeater, which directly determines the performance of an optical fiber repeater. The high-performance RF optical module can provide automatic compensation for optical attenuation, automatic compensation for laser working status, and real-time collection and analysis of various state qua...

AI Technical Summary

Problems solved by technology

[0003] Although the common optical modules currently on the market have basic photoelectric conversion functions, provide FSK channel and optical path attenuation automatic compensation functions, and control functions such as RF amplification, RF gain control, and RF detection, ordinary optical modules can only provide single-band RF For signal transmission, different optical modules need to be designed for communication networks in different frequency bands

And because the radio frequency analog signal is easily subject to external interference during transmission, the stability of the signal is also a difficult problem to solve

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