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Measurement and Data Correction of Channel Sampling Timing Walk-Off of Photonic Analog-to-Digital Converter in Signal Recovery.
Qi, Junli; Chen, Xin; Fu, Meicheng; Zhang, Hongyu; Yi, Wenjun; Zhang, Hui; Wei, Xiaoming; Shi, Bo; Xu, Tengfei; Su, Dezhi; Wang, Weihua; Li, Xiujian.
Afiliación
  • Qi J; College of Science, National University of Defense Technology, Changsha 410073, China.
  • Chen X; Institute of Plasma Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China.
  • Fu M; Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230031, China.
  • Zhang H; Basic Department, Army Academy of Artillery and Air Defense, Hefei 230031, China.
  • Yi W; College of Science, National University of Defense Technology, Changsha 410073, China.
  • Zhang H; College of Science, National University of Defense Technology, Changsha 410073, China.
  • Wei X; College of Science, National University of Defense Technology, Changsha 410073, China.
  • Shi B; College of Science, National University of Defense Technology, Changsha 410073, China.
  • Xu T; Basic Department, Army Academy of Artillery and Air Defense, Hefei 230031, China.
  • Su D; Basic Department, Army Academy of Artillery and Air Defense, Hefei 230031, China.
  • Wang W; Basic Department, Army Academy of Artillery and Air Defense, Hefei 230031, China.
  • Li X; Beijing Institute of Systems Engineering and Information Control, Beijing 100071, China.
Micromachines (Basel) ; 15(2)2024 Feb 19.
Article en En | MEDLINE | ID: mdl-38399018
ABSTRACT
A two-channel, time-wavelength interleaved photonic analog-to-digital converter (PADC) system with a sampling rate of 10.4 GSa/s was established, and a concise method for measuring and data correcting the channel sampling timing walk-off of PADCs for signal recovery was proposed. The measurements show that for the two RF signals of f1 = 100 MHz and f2 = 200 MHz, the channel sampling timing walk-off was 12 sampling periods, which results in an ENOB = -0.1051 bits for the 100 MHz directly synthesized signal, while the ENOB improved up to 4.0136 bits using shift synthesis. In addition, the peak limit method (PLM) and normalization processing were introduced to reduce the impacts of signal peak jitter and power inconsistency between two channels, which further improve the ENOB of the 100 MHz signal up to 4.5668 bits. All signals were analyzed and discussed in both time and frequency domains. The 21.1 GHz signal was also collected and converted using the established two-channel PADC system with the data correction method, combining the PLM, normalization, and shift synthesis, showing that the ENOB increased from the initial -0.9181 to 4.1913 bits, which demonstrates that our method can be effectively used for signal recovery in channel-interleaved PADCs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza