Title :
Optimal Control of Intermodulation Distortion in Hybrid Fiber-Coaxial CATV Systems
Author :
Alley, Gary D. ; Kuo, Yen Long
Author_Institution :
Lucent Technologies Bell Labs, 1600 Osgood St., North Andover, MA 01845
Abstract :
A general quadratic phase relationship for the NTSC video carriers has been used as the basis for minimizing the Peak/RMS ratio of the broadband HFC signal as well as the second- and third-order intermodulation distortion products. Emphasis is placed on distortion products which fall outside the band occupied by the NTSC signals and thus degrade digital performance. An experimental phase-controlled coherent HRC CATV system consisting of 81 live video channels and four 64 QAM digital channels has been used to demonstrate the advantages of an optimal phase-controlled headend over traditional systems.
Keywords :
Bit error rate; Coaxial components; Digital modulation; Hybrid fiber coaxial cables; Intermodulation distortion; Nonlinear distortion; Optimal control; Phase distortion; Quadrature amplitude modulation; Signal to noise ratio;
Conference_Titel :
ARFTG Conference Digest-Spring, 49th
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-5686-1
DOI :
10.1109/ARFTG.1997.327209
