Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.
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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/1721.1/47817 |
| _version_ | 1811080070966542336 |
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| author | Lu, Ke, S.M. Massachusetts Institute of Technology |
| author2 | Charles G. Sodini. |
| author_facet | Charles G. Sodini. Lu, Ke, S.M. Massachusetts Institute of Technology |
| author_sort | Lu, Ke, S.M. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009. |
| first_indexed | 2024-09-23T11:24:59Z |
| format | Thesis |
| id | mit-1721.1/47817 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:24:59Z |
| publishDate | 2009 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/478172019-04-10T11:06:38Z Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems Lu, Ke, S.M. Massachusetts Institute of Technology Charles G. Sodini. 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, 2009. Includes bibliographical references (leaves 68-69). Imaging systems using millimeter-wave frequencies allow for the possibilities of vehicular radar and concealed weapons detection. By using silicon technology, the integration of millimeter-wave circuits can reach new levels that were previously impossible. This thesis discusses the challenge and design of a mm-wave imaging system using a technique called digital phase tightening for improved spatial resolution. Digital phase tightening uses feedback and oversampling to accurately measure the amplitude and phase of an incoming signal. Furthermore, it can be implemented using only a delay-lock loop, an analog-to-digital converter, and a counter. A proof of concept system utilizing a 2.4GHz delay-lock loop with supporting circuitry is designed in 90nm CMOS. Test results demonstrate a proof of concept system with a measured DLL resolution of 41.7ps that consumes 36mW of power. The goal of the system is to reduce the jitter of phase measurements to the order of femto-seconds. In the proto system, the quantization error is larger than the Gaussian noise; therefore, significant improvements in the accuracy of the phase measurements were not observed. by Ke Lu. S.M. 2009-10-01T15:46:36Z 2009-10-01T15:46:36Z 2009 2009 Thesis http://hdl.handle.net/1721.1/47817 429466762 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 69 leaves application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Lu, Ke, S.M. Massachusetts Institute of Technology Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems |
| title | Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems |
| title_full | Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems |
| title_fullStr | Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems |
| title_full_unstemmed | Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems |
| title_short | Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems |
| title_sort | digital phase tightening for improved spatial resolution in millimeter wave imaging systems |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/47817 |
| work_keys_str_mv | AT lukesmmassachusettsinstituteoftechnology digitalphasetighteningforimprovedspatialresolutioninmillimeterwaveimagingsystems |