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NOVEL PHASE NOISE COMPENSATION SCHEMES
FOR COMMUNICATION TRANSCEIVERS
by
Liang Zhao
____________________________________
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHIILOSOPHY
(ELECTRICAL ENGINEERING)
December 2006
Copyright 2006 Liang Zhao
Object Description
| Title | Novel phase noise compensation schemes for communication transceivers |
| Author | Zhao, Liang |
| Author email | liangzhao76@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2006-07-19 |
| Date submitted | 2006 |
| Restricted until | Unrestricted |
| Date published | 2006-12-04 |
| Advisor (committee chair) | Namgoong, Won |
| Advisor (committee member) |
Ortega, Antonio Alexander, Kenneth S. |
| Abstract | Local oscillators are prevalent in most communication systems. They upconvert the baseband signals to the radio frequency (RF) at the transmitter, or downconvert the RF signals to intermediate frequency or baseband. Local oscillators suffer from a type of noises know as the phase noises (PHN). Since the performance of the local oscillators is crucial to the performance of the whole communication system, it is important to compensate the effects of the phase noise originated from the local oscillators. In this research, novel PHN compensation methods are proposed for both communication receivers and transmitters. The proposed approach uses the information provided by an additional signal path that is added with modest hardware overhead to better estimate the PHN.; For receivers, the oscillator output in this additional signal path is self-downconverted to the baseband by mixing itself with a delayed and conjugated replica so as to provide PHN information that is free from data-modulation. A joint prediction and smoothing Wiener filter can then be employed to obtain the minimum mean-squared error (MMSE) estimate of the PHN. Adaptive schemes are also presented using the least-mean-square (LMS) algorithm and recursive-least-square (RLS) algorithm. Simulations of a 64-QAM receiver confirm the analysis results of the PHN estimation performance, and show that the proposed method can improve the receiver performance significantly over the conventional schemes. Lab testing results for a BPSK receiver is also provided which suggests that the proposed scheme outperforms the conventional schemes.; The concept of self-down conversion is applied to the transmitter PHN compensation as well. It differs from the receiver PHN compensation in that two self-downconversion blocks are employed for transmitters, one to obtain a baseband PHN signal and one to obtain an estimation error signal. The adaptive transmitter PHN estimation algorithm is devised and simulated. The improvement in PHN spectrum can be as high as 10 dB.; There are generally two types of PHN models commonly used in the literature: the stationary PHN and the Wiener PHN. Both types of PHN can be compensated effectively by the proposed approaches. |
| Keyword | phase noise; phase recovery; transceiver; adaptive; LMS; RLS |
| 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-m213 |
| Contributing entity | University of Southern California |
| Rights | Zhao, Liang |
| 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-Zhao-20061204 |
| Archival file | uscthesesreloadpub_Volume14/etd-Zhao-20061204.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Full text | NOVEL PHASE NOISE COMPENSATION SCHEMES FOR COMMUNICATION TRANSCEIVERS by Liang Zhao ____________________________________ A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHIILOSOPHY (ELECTRICAL ENGINEERING) December 2006 Copyright 2006 Liang Zhao |
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