Analog-to-digital conversion system and method

Abstract

The invention discloses an analog-to-digital conversion system and an analog-to-digital conversion method. The system comprises an analog-to-digital converter to be compensated, a data transferring module and a digital pre-distortion anti-model module, wherein the analog-to-digital converter to be compensated is used for converting an acquired analog signal into a digital signal of a real number field; the data transferring module is used for transferring the digital signal from the real number field to a complex number field; and the digital pre-distortion anti-model module is used for compensating the digital signal in the complex number field according to the inverse process of the distortion of the analog-to-digital converter to be compensated to obtain compensation data. By the invention, the digital signal is compensated in the complex number field, so the problem of spectrum distortion caused by intermodulation distortion is solved, the capability of response of the system to the signal is improved, and the acquired analog digital is reflected more really.

Description

technical field [0001] The present invention relates to the communication field, in particular to an analog-to-digital conversion system and method. Background technique [0002] With the development of communication technology, more and more complex and diverse data are transmitted through mobile and fixed communication networks. Most of the data transmitted and processed in the communication network is digital domain data, so it is necessary to use an analog-digital converter (Analog-Digital Converter, referred to as "ADC") to convert analog signals (such as natural radio waves, light waves, sound, etc.) for digital signals. [0003] ADC is a device that converts a continuous analog signal into a discrete quantized digital signal. The actual ADC does not work in an ideal state, so the actual ADC cannot ideally track the input analog signal. Therefore, in order to make the output of the actual ADC approximate to the ideal ADC, there have been some techniques to calibrate...

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Problems solved by technology

This method also pays no attention to the intermodulation distortion of the ADC

[0007] The inventors found that the above-mentioned ADC calibration methods are all calibrated or compensated in the real number domain, so only the amplitude information can be used, and the phase information cannot be used, so the intermodulation distortion problem of the ADC cannot be solved, and no effective solution has been proposed yet

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