Tracking analysis of an improved infinite impulse

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Publication Type thesis
School or College College of Engineering
Department Electrical & Computer Engineering
Author Flint, Randall S
Title Tracking analysis of an improved infinite impulse
Date 2008-05
Description In mobile communication systems, the Doppler shift is a very common cause of time-varying changes in the carrier-frequency offset. This thesis discusses the use and design of an adaptive line enhancer to aid in the process of detecting and tracking these time-varying changes. Specifically, it describes the use of an adaptive line enhancer in quadrature amplitude modulation (QAM), or phase shift keying (PSK), carrier-recovery systems. It shows that finite-impulse response (FIR) adaptive line enhancers are not well-suited for tracking changes in the carrier frequency offset, and that an infinite-impulse response (IIR) adaptive line enhancer is much more effective for this application. Then, based on the LMS algorithm, the IIR adaptive line enhancer algorithm is derived. Finally, an FIR filter is developed that is optimal for out-of-band noise rejection, and is used in conjunction with the IIR adaptive line enhancer to further improve its line-enhancement capabilities. The FIR and IIR adaptive line enhancer algorithms are then simulated under typical mobile communication scenarios, to compare the effectiveness of each algorithm. Then, it is shown that the IIR adaptive line enhancer, along with the optimal FIR filter, is much more effective at tracking changes in the carrier-frequency offset.
Type Text
Publisher University of Utah
Subject Adaptive filters; Adaptive signal processing
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Relation is Version of Digital reproduction of "Tracking analysis of an improved infinite impulse response adaptive line enhancer " J. Willard Marriott Library Special Collections, TK7.5 2008 .F58
Rights Management © Randall S. Flint
Format Medium application/pdf
Format Extent 53,876 bytes
Identifier us-etd2,32581
Source Original: University of Utah J. Willard Marriott Library Special Collections
ARK ark:/87278/s6s18h07
Setname ir_etd
Date Created 2012-04-23
Date Modified 2012-05-16
ID 192551
Reference URL https://collections.lib.utah.edu/ark:/87278/s6s18h07