Novel method and system for directly sampling radio-frequency signal based on spatial sampling

Abstract

The invention discloses a novel method and system for directly sampling a radio-frequency signal based on spatial sampling. One end of a transmission line is grounded or is in an open-circuit state, and the radio-frequency signal is inputted from the other end of the transmission line. The radio-frequency signal is reflected at the grounding end or the open-circuit end of the transmission line. An incident signal and a reflection signal are overlapped to generate a signal with a dynamic standing wave form structure. The transmission line is provided with a plurality of measurement points, and the measurement points are provided with signal couplers. Coupled signals are sequentially processed through a signal processing module, a detection module and an analog-digital converter, are converted into digital signals, and are transmitted to a computer for calculation, thereby obtaining the amplitude, frequency and phase information of the radio frequency signal. The method is different from a conventional AD conversion mode, employs a mode of spatial sampling to replace a mode of time sampling, can complete the direct sampling of the radio frequency signal through a conventional low-speed AD converter, and provides a new solution for the software radio technology based on the direct radio-sampling sampling.

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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