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Podsiadlik, Tomasz, 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: | 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 |
| Related URLs: | |
| URI: | https://mu.eprints-hosting.org/id/eprint/10280 |
| 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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