Narrow-band scrambling technique with adjustable frequency

Yifan Li; Xiaolong Chen; Haiqing Zhang; Mingjun Liu; Shuoyan Zhang; Haiyu Wang

doi:10.1117/12.2689806

7 September 2023 Narrow-band scrambling technique with adjustable frequency

Yifan Li, Xiaolong Chen, Haiqing Zhang, Mingjun Liu, Shuoyan Zhang, Haiyu Wang

Proceedings Volume 12790, Eighth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023); 1279016 (2023) https://doi.org/10.1117/12.2689806
Event: 8th International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023), 2023, Hangzhou, China

Abstract

By adding disturbance, or Dither signal, to ADC, the periodicity of quantization error can be broken, thus improving SFDR and SNR of the system. To solve the problem that the frequency of the Dither signal generated by the traditional large narrow-band Dither structure is limited by the designed analog filter, a new narrow-band Dither structure is proposed in this paper, which can directly generate Dither noise in a certain bandwidth range. In this paper, the determination of the frequency position of Dither signal and the requirements of the frequency range are analyzed and verified by the theoretical analysis and simulation. Secondly, the frequency adjustable narrowband Dither generation structure is analyzed and realized by the simulation after the addition of VCO, which proves the realizability of this structure. Finally, the Matlab simulink module is used to build the simulation platform, and the large narrowband Dither algorithm based on this structure is simulated. The simulation results show that this structure can improve the SFDR and SNR of ADC while changing the band range of Dither signal.

Citation Download Citation

Yifan Li, Xiaolong Chen, Haiqing Zhang, Mingjun Liu, Shuoyan Zhang, and Haiyu Wang "Narrow-band scrambling technique with adjustable frequency", Proc. SPIE 12790, Eighth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023), 1279016 (7 September 2023); https://doi.org/10.1117/12.2689806

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