A system and method for reducing adc harmonic level based on digital phase-shift synthesis

Abstract

The invention discloses an ADC harmonic level reduction system and method based on digital phase shift synthesis. The system comprises a power division phase shift network, an ADC module and a digitalphase shift synthesis network. Wherein the input end of the power division phase shift network receives an analog signal to be processed, the output end of the power division phase shift network is connected with the ADC module, and the output end of the ADC module is connected with the digital phase shift synthesis network; The power division phase shift network is used for processing the analogsignals to form multiple paths of analog signals with different phase shift values; The ADC module is used for performing analog-to-digital conversion on each path of analog signal from the power division phase shift network to obtain a plurality of paths of digital signals; The digital phase shift synthesis network comprises a digital phase shift unit and a synthesis unit. A to-be-processed analog signal is divided into eight paths, each path of signal is subjected to phase shift, eight paths of analog signals with different phase shift values are output, the signals are subjected to digitalphase shift and synthesis after being converted by the ADC module, and the harmonic wave level of the ADC is effectively reduced.

Description

technical field

[0001] The invention relates to harmonic elimination, in particular to an ADC harmonic level reduction system and method based on digital phase shift synthesis. Background technique

[0002] For a high dynamic wideband digital receiver, it is very important to increase the dynamic range of the ADC. Due to the limitation of the current ADC design and manufacturing process, the dynamic range of the high-speed ADC cannot meet the actual needs. Among the many factors that affect the dynamic range of the ADC, the even and odd harmonics generated by the high-speed ADC itself are the main spurious signals.

[0003] Therefore, how to reduce the even harmonics and odd harmonics generated by the ADC is of great significance to the design technology of large instantaneous bandwidth and high dynamic digital receivers. Contents of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of ADC harmonic...

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