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Proceedings Paper

Theoretical analysis on the sampling criteria for time-interleaved photonic analog-to-digital converters
Author(s): Jianping Chen; Feiran Su; Guiling Wu
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Paper Abstract

Time-interleaved photonic analog-to-digital converter (TIPADC) is a promising candidate to process ultra-wideband signals. In a TIPADC, quantization is electrical in order to obtain large effective number of bits (ENOB). In this paper, we study the issues on the signal sampling and reconstruction in the TIPADC from the systematic point of view. The sampling output and frequency response of the system are derived using a model that includes the photonic sampling, demultiplexing, photo detecting, electronic quantizing and digital processing. The signal sampling and reconstruction mechanism of TIPADC with a uniform system sampling rate and matched channels are illuminated with the spectrum of signal in each processing step. The effect of the sampling pulse and back-end electronics on the system frequency response is analyzed in detail. The feasible regions of the system for alias-free sampling in terms of system frequency response, and a set of sampling criteria on bandwidth of the sampling pulse and back-end electronics are presented for the TIPADC. We find that the analog bandwidth of TIPADC can be much higher than the bandwidth of back-end electronics due to the weighted summing introduced by the multichannel time-interleaved photonic sampling. The proposed model and sampling criteria are validated by simulations under different parameter configurations.

Paper Details

Date Published: 13 November 2014
PDF: 10 pages
Proc. SPIE 9279, Real-time Photonic Measurements, Data Management, and Processing, 927907 (13 November 2014); doi: 10.1117/12.2072440
Show Author Affiliations
Jianping Chen, Shanghai Jiao Tong Univ. (China)
Feiran Su, Shanghai Jiao Tong Univ. (China)
Guiling Wu, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 9279:
Real-time Photonic Measurements, Data Management, and Processing
Bahram Jalali; Ming Li; Keisuke Goda; Mohammad Hossein Asghari, Editor(s)

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