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research article
Ability of adaptive filters to track carrier offsets and channel nonstationarities
This paper studies the tracking performance of adaptive filters operating in the presence of two sources of nonstationarities: carrier frequency offsets and random channel variations. Both impairments are common in digital communications due to mismatches between transmitter and receiver carrier generators and channel fading. The paper derives expressions for the mean-square error and shows how filter performance is degraded under such nonstationary conditions. Selections of step sizes for optimal tracking performance are derived, different adaptive algorithms are compared, and supporting simulation results are provided.
Type
research article
Authors
Publication date
2002
Publisher
Published in
Volume
50
Issue
7
Start page
1533
End page
1544
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
December 19, 2017
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