Radio-frequency signal A/D (Analog to Digital) conversion system and method based on multi-rate parallel sampling

Abstract

The invention discloses a radio-frequency signal A / D (Analog to Digital) conversion system and method based on multi-rate parallel sampling. The system comprises a power distribution module, a first A / D conversion chip, a clock source module, a second A / D conversion chip and a digital information processing module; the first A / D conversion chip and the second A / D conversion chip both are connected with the power distribution module; the clock source module is positioned between the first A / D conversion chip and the second A / D conversion chip; the first A / D conversion chip is connected with the digital information processing module; and the second A / D conversion chip is connected with the digital information processing module. According to the radio-frequency signal A / D conversion system and method based on the multi-rate parallel sampling, the direct digitalization for receiving a radio-frequency signal in wireless communication can be realized, the resolution and the spurious-free dynamic range are improved, and the operation is simple.

Description

technical field [0001] The invention relates to a radio frequency signal analog-to-digital conversion system and method, in particular to a radio frequency signal analog-to-digital conversion system and method based on multi-rate parallel sampling. Background technique [0002] In radio fields such as communications, radar, and electronic warfare, software radio is the ultimate goal promoted by digital technology. The software radio requires A / D and D / A (Analog to Digital Converter, a device that converts digital quantities into analogues) to be as close as possible to the antenna, eliminating the need for complex analog frequency conversion and directly digitizing the signal, which not only significantly reduces the number of components, It avoids the problems of signal distortion, poor adaptability, and poor scalability caused by analog circuits, and digital signal processing can realize dynamic configuration and reconstruction of parameters such as the center frequency an...

AI Technical Summary

Problems solved by technology

At present, the mainstream A / D converters on the market are not enough to meet the requirements of radio frequency digitization. A feasible solution is to improve the performance of the A / D converter by using multiple ADC chips for parallel sampling.

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