DocumentCode
2829787
Title
A blind 1024-QAM demodulator for cable television
Author
Kurakake, Takuya ; Nakamura, Naoyoshi ; Oyamada, Kimiyuki
Author_Institution
Sci. & Tech. Res. Labs., NHK, Tokyo, Japan
fYear
2004
fDate
2004
Firstpage
136
Lastpage
139
Abstract
A blind demodulator for 1024 quadrature amplitude modulation (QAM) is described. It uses a method that combines carrier recovery without decision-directed operation and decision feedback equalization by using a modified constant modulus algorithm (MCMA) to improve equalization. A prototype shows good 1024-QAM demodulation under multipath and frequency offset conditions. The demodulator also operates well in commercial hybrid-fiber-and-coaxial cable systems.
Keywords
adaptive equalisers; cable television; coaxial cables; demodulators; hybrid fibre coax networks; quadrature amplitude modulation; blind 1024-QAM demodulator; cable television; carrier recovery; coaxial cable system; commercial hybrid-fiber system; equalization improvement; frequency offset condition; modified constant modulus algorithm; multipath offset condition; quadrature amplitude modulation; Blind equalizers; Cable TV; Circuits; Convergence; Decision feedback equalizers; Demodulation; Field-flow fractionation; Hybrid fiber coaxial cables; Quadrature amplitude modulation; TV broadcasting;
fLanguage
English
Publisher
ieee
Conference_Titel
Communications, 2004 International Zurich Seminar on
Print_ISBN
0-7803-8329-X
Type
conf
DOI
10.1109/IZS.2004.1287407
Filename
1287407
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