Front-end device for digital radio frequency receiver, receiver and front-end receiving method

Abstract

The invention discloses a front-end device for a digital radio frequency receiver, belonging to the technical field of microwave photons. The front-end device comprises a light source, an electrooptic polarization demodulator, a first polarization controller, a second polarization controller, a fiber beam splitter, a third polarization controller, a fourth polarization controller, a first polarization beam splitter, a second polarization beam splitter, a first balanced detector, a second balanced detector, a first analog / digital converter, a second analog / digital converter and a DSP (Digital Signal Processor). The invention also discloses a digital radio frequency receiver using the front-end device and a front-end receiving method thereof. The large dynamic front-end device for the digital radio frequency receiver, which has low cost and low environmental requirements, is realized.

Description

technical field [0001] The invention relates to the field of microwave photon technology, in particular to a digital radio frequency receiver front-end device, a receiver and a front-end receiving method. Background technique [0002] The radio frequency front end of the receiver is located at the forefront of the receiver, and its structure and performance directly affect the entire receiver. At present, the traditional RF front-end includes many electronic devices, such as electric amplifiers, mixers, filters, and phase shifters. These electronic devices will generate serious nonlinear distortion and introduce noise, making it increasingly difficult to improve the performance of the RF front-end. The rise of microwave photonics has opened up a new way of thinking for the receiver RF front end. Microwave photonics technology can realize a digital radio frequency receiver with wideband and large dynamic range. [0003] figure 1 It is the RF optical front end based on the ...

AI Technical Summary

Problems solved by technology

However, the most important disadvantages of this solution are:

[0005] 1. Affected by the phase noise of the laser source, the system is unstable and requires high experimental conditions, so it can only stay in the laboratory stage;

[0006] 2. The system is complex and expensive;

[0007] 3. The optical transmission distance of radio frequency signals is limited

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