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PRECODING TECHNIQUES FOR EFFICIENT ULTRA-WIDEBAND (UWB)
COMMUNICATION SYSTEMS
by
Yu-Hao Chang
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Ful¯llment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ELECTRICAL ENGINEERING)
December 2007
Copyright 2007 Yu-Hao Chang
Object Description
| Title | Precoding techniques for efficient ultra-wideband (UWB) communication systems |
| Author | Chang, Yu-Hao |
| Author email | yuhaocha@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2007-09-05 |
| Date submitted | 2007 |
| Restricted until | Restricted until 19 Sept. 2009. |
| Date published | 2009-09-19 |
| Advisor (committee chair) | Kuo, C.-C. Jay |
| Advisor (committee member) |
Proskurowski, Wlodek Yu, Xiaoli |
| Abstract | It is always desirable to have a cheap and low power mobile receiver in a wireless communication environment. As for the ultra-wideband (UWB) system, the complexity of channel equalization could be high due to the long UWB channel impulse response. As a result, the UWBreceiver design is not simple. However, the overhead of UWB channel equalization could be shifted from the receiver to the transmitter by the use of precoding so that a low cost receiver is possible. Precoding techniques, such as time-reversal prefilter (TRP) and the transmit minimum mean square error (Tx-MMSE) prefilter, pre-equalize the transmit signal based on the current channel information, which can be estimated and fed back to the transmitter by the corresponding receiver. Since the UWB channel contains a great number of multipath components, sending the complete channel information to the transmitter demands a lot of feedback channel capacity and is not practical.; In the first half of this thesis, different UWB precoding techniques that requires only partial knowledge about the current channel, for example, reduced-rank UWB precoding and channel phase precoded UWB (CPP-UWB) systems, are proposed to save the feedback overhead. As simulation results suggest, these precoding schemes provide different trade-offs between decoding performance and fed back information quantity. Later, the performance degradation of both TRP and CPP systems due to clock jitter is analyzed. It is shown that CPP is not only simpler in design but also more robust than TRP against timing jitter. Finally, CPP-Rake and CPP-MTA systems, which utilize the Rake receiver and multiple transmit antennas, respectively, are proposed to lower the decoding error of CPP-UWB systems as well. |
| Keyword | precoding; ultra-wideband; UWB; time-reversal prefiltering; TRP; Pre-Rake |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m827 |
| Rights | Chang, Yu-Hao |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Chang-20070919 |
| Archival file | uscthesesreloadpub_Volume14/etd-Chang-20070919.pdf |
Description
| Title | Page 1 |
| Full text | PRECODING TECHNIQUES FOR EFFICIENT ULTRA-WIDEBAND (UWB) COMMUNICATION SYSTEMS by Yu-Hao Chang A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Ful¯llment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ELECTRICAL ENGINEERING) December 2007 Copyright 2007 Yu-Hao Chang |
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