DocumentCode
754745
Title
Tracking Performance of Unbalanced QPSK Demodulators: Part II-Biphase Costas Loop with Active Arm Filters
Author
Simon, Marvin K.
Author_Institution
Jet Propulsion Lab., Pasadena, CA, USA
Volume
26
Issue
8
fYear
1978
fDate
8/1/1978 12:00:00 AM
Firstpage
1157
Lastpage
1166
Abstract
A previous Costas loop study by the author demonstrated that for biphase modulation considerable improvement in tracking performance could be obtained by employing active arm filters of the integrate-and-dump type as opposed to passive arm filters. The purpose of this part, then, is to demonstrate that a similar performance improvement can be obtained for an unbalanced QPSK modulation.
Keywords
Costas loops; PSK modulation/demodulation; Active filters; Amplitude modulation; Demodulation; Error correction; Frequency synchronization; Passive filters; Phase modulation; Pulse modulation; Quadrature phase shift keying; Tracking loops;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1978.1094220
Filename
1094220
Link To Document