A Novel Radio Frequency Signal Direct Sampling Method and System Based on Spatial Sampling

Abstract

The invention discloses a novel radio frequency signal direct sampling method and system based on space sampling. One end of the transmission line is grounded or open-circuited, and the other end is input with an RF signal. The RF signal is reflected at the grounded end or the open-circuited end of the transmission line. The incident signal and the reflected signal are superimposed to produce a signal with a dynamic standing wave waveform structure; A measuring point, where a signal coupler is installed, the coupled signal is converted into a digital signal through the processing of the signal processing module, the detection module and the analog / digital converter in turn, and then transmitted to the computer for calculation and processing to obtain the amplitude of the radio frequency signal, frequency and phase information. Different from the traditional AD conversion mode, the present invention can use the traditional low-speed AD converter to complete the direct sampling of the radio frequency signal by replacing the time sampling with the space sampling method, and provides a new software radio technology based on direct radio frequency sampling. s solution.

Description

technical field [0001] The invention relates to a signal sampling system and method, in particular to a novel radio frequency signal direct sampling method and system based on space sampling. Background technique [0002] Wireless communication is an extremely important part of modern communication systems, and has been widely used in satellite communication, remote sensing, navigation, military and so on. Due to different application occasions, people have proposed a variety of wireless communication standards. The modulation methods, frequencies, and data formats of these communication standards are different, and there is a lack of interoperability between different communication standards and platforms. In order to solve the interoperability problem, people proposed The concept of software defined radio. [0003] The so-called software radio is to construct an open, standardized, and modular general-purpose hardware platform, use analog-to-digital converter (ADC) and di...

AI Technical Summary

Problems solved by technology

Although software radio has a very bright prospect, in practical applications, digitizing radio frequency signals requires a very high-speed analog-to-digital converter (ADC). Due to the limitation of high-speed ADC technology, software radio cannot be applied to most high-frequency applications. Communication, and the cost of the frequency band system suitable for the application is also relatively expensive

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