DocumentCode
3391002
Title
Kurtosis DPLL AND PTCM decoder for non-linearly amplified 16-QAM
Author
Jayasimha, S. ; Jyothendar, P.
Author_Institution
Signion Syst. Ltd., Hyderabad
fYear
2005
fDate
17-20 Oct. 2005
Firstpage
81
Abstract
We describe a non-decision directed kurtosis-based digital phase lock loop (DPLL) algorithm for 16-QAM carrier recovery in the presence of non-linear amplification. A constellation rotation (with respect to locked phase) allows each of the trellis decoder´s set-partitions to be fully confined to the received vector quadrants. Transponder characteristic variations may be automatically tracked by adapting the TCM decoder´s metric LUT based on 4 dominant maxima in a 2-D histogram of quadrant data
Keywords
amplification; decoding; digital phase locked loops; quadrature amplitude modulation; trellis coded modulation; LUT; PTCM decoder; TCM decoder; carrier recovery; constellation rotation; digital phase lock loop; kurtosis DPLL; nonlinear amplification; nonlinearly amplified 16-QAM; trellis decoder; vector quadrants; Carrier confinement; Constellation diagram; Convolutional codes; Histograms; Maximum likelihood decoding; Maximum likelihood estimation; Modulation coding; Satellites; Table lookup; Transponders;
fLanguage
English
Publisher
ieee
Conference_Titel
Military Communications Conference, 2005. MILCOM 2005. IEEE
Conference_Location
Atlantic City, NJ
Print_ISBN
0-7803-9393-7
Type
conf
DOI
10.1109/MILCOM.2005.1605668
Filename
1605668
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