DocumentCode
1182133
Title
Minimisation of carrier frequency acquisition time in QAM systems
Author
Gagnon, Ghyslain ; Choquette, F. ; Belzile, J. ; Gagnon, Francois
Author_Institution
Dept. of Electron., Carleton Univ., Ottawa, ON
Volume
45
Issue
5
fYear
2009
Firstpage
276
Lastpage
277
Abstract
Two recent carrier recovery loops for high-order quadrature amplitude modulation (QAM) and optimisation of their parameters for minimum frequency acquisition times are analysed. All variations on the parameters were analysed and optimised to obtain optimal loop bandwidths and damping factors, for given signal-to-noise ratios. Simulation results show that after optimisation, the average acquisition time for 64-QAM is kept below 1000 symbols over the entire range of initial frequency offsets from 0 to 1/8 the symbol rate. This number increases to 3200 symbols for 256-QAM.
Keywords
quadrature amplitude modulation; QAM system; carrier frequency acquisition time minimisation; damping factor; optimal loop bandwidth; quadrature amplitude modulation system; signal-to-noise ratio;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20092690
Filename
4796363
Link To Document