Podsiadlik, Tomasz and Dooley, John and Farrell, Ronan (2016) Analysis of 3-Level Bandpass Sigma-Delta Modulators With 2-Level Output. IEEE Transactions on Circuits and Systems II: Express Briefs, 65 (4). pp. 506-510. ISSN 1558-3791

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Abstract

This brief analyzes a recently introduced, 2-level bandpass modulator incorporating 3-level lowpass ΣΔ modulators. While the combination of 3-level ΣΔ with 2-level output improves output signal-to-noise ratio (SNR) in a wideband sense, it also introduces nonlinear distortion in the 2-level output. In this brief, the nonlinear effects are modeled and a linearization technique offering up to 22 dB of error cancellation is derived. In result, the modified 2-level modulator can show up to 6 dB of an SNR improvement versus equivalent for a 2-level ΣΔ modulator. The new technique is demonstrated through analysis and experimental results.

Item Type:	Article
Keywords:	Field-programmable gate array (FPGA); linear model; predistortion; sigma delta;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID:	10280
Identification Number:	https://doi.org/10.1109/TCSII.2016.2639282
Depositing User:	Ronan Farrell
Date Deposited:	05 Dec 2018 14:46
Journal or Publication Title:	IEEE Transactions on Circuits and Systems II: Express Briefs
Publisher:	IEEE
Refereed:	Yes
URI:	https://ieeexplore.ieee.org
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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