An all-digital transmitter for pulsed ultra-wideband communication
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2009
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| Online Access: | http://hdl.handle.net/1721.1/44732 |
| _version_ | 1811092270022131712 |
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| author | Mercier, Patrick Philip |
| author2 | Anantha P. Chandrakasan. |
| author_facet | Anantha P. Chandrakasan. Mercier, Patrick Philip |
| author_sort | Mercier, Patrick Philip |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008. |
| first_indexed | 2024-09-23T15:15:44Z |
| format | Thesis |
| id | mit-1721.1/44732 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:15:44Z |
| publishDate | 2009 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/447322019-04-11T08:31:34Z An all-digital transmitter for pulsed ultra-wideband communication Mercier, Patrick Philip Anantha P. Chandrakasan. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008. Includes bibliographical references (p. 91-96). Applications like sensor networks, medical monitoring, and asset tracking have led to a demand for energy-efficient and low-cost wireless transceivers. These types of applications typically require low effective data rates, thus providing an opportunity to employ simple modulation schemes and aggressive duty-cycling. Due to their inherently duty-cycled nature, pulse-based Ultra-Wideband (UWB) systems are amenable to low-power operation by shutting off circuitry during idle mode between pulses. Furthermore, the use of non-coherent UWB signaling greatly simplifies both transmitter and receiver implementations, offering additional energy savings. This thesis presents an all-digital transmitter designed for a non-coherent pulsed UWB system. By exploiting relaxed center frequency tolerances in non-coherent wideband communication, the transmitter synthesizes UWB pulses from an energy efficient, single-ended digital ring oscillator. Dual capacitively-coupled digital power amplifiers (PAs) are used in tandem to generate bipolar phase modulated pulses for spectral scrambling purposes. By maintaining opposite common modes at the output of these PAs during idle mode (i.e. when no pulses are being transmitted), low frequency turn-on and turn-off transients typically associated with single-ended digital circuits driving single-ended antennas are attenuated by up to 12dB. Furthermore, four level digital pulse shaping is employed to attenuate RF side lobes by up to 20dB. The resulting dual power amplifiers achieve FCC compliant operation in the 3.5, 4.0, and 4.5GHz IEEE 802.15.4a bands without the use of any off-chip filters or large passive components. The transmitter is fabricated in a 90nm CMOS process and requires a core area of 0.07mm2. The entirely digital architecture consumes zero static bias current, resulting in an energy efficiency of 17.5pJ/pulse at data rates up to 15.6Mbps. by Patrick Philip Mercier. S.M. 2009-03-16T19:35:41Z 2009-03-16T19:35:41Z 2008 2008 Thesis http://hdl.handle.net/1721.1/44732 298256573 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 96 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Mercier, Patrick Philip An all-digital transmitter for pulsed ultra-wideband communication |
| title | An all-digital transmitter for pulsed ultra-wideband communication |
| title_full | An all-digital transmitter for pulsed ultra-wideband communication |
| title_fullStr | An all-digital transmitter for pulsed ultra-wideband communication |
| title_full_unstemmed | An all-digital transmitter for pulsed ultra-wideband communication |
| title_short | An all-digital transmitter for pulsed ultra-wideband communication |
| title_sort | all digital transmitter for pulsed ultra wideband communication |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/44732 |
| work_keys_str_mv | AT mercierpatrickphilip analldigitaltransmitterforpulsedultrawidebandcommunication AT mercierpatrickphilip alldigitaltransmitterforpulsedultrawidebandcommunication |