Title :
The impact of CSO/CTB distortion on BER characteristics by hybrid multichannel analog/QAM transmission systems
fDate :
9/1/1999 12:00:00 AM
Abstract :
The FEC limit (uncorrectable errors) with CSO/CTB (composite second order/composite triple beats) distortion presence in a channel is not for modulated lasers only, but for coaxial networks with amplifiers too. The system quality reserve depends not only on CNR, but is more limited on CSO/CTB. It is important, for the definition of the system quality reserve, to calculate the CSO/CTB spectrum caused by analogue channels within analogue and digital QAM channels and also to calculate the changing of CNR from the intermodulation interaction between analog and digital channels in a CATV network
Keywords :
cable television; coaxial cables; digital television; error statistics; forward error correction; optical fibre networks; quadrature amplitude modulation; 0 to 4 MHz; BER characteristics; CATV network; CNR; CSO/CTB distortion; FEC; QAM channels; analogue channels; coaxial networks; composite second order/composite triple beats; distortion; hybrid multichannel analog/QAM transmission systems; intermodulation interaction; system quality reserve; uncorrectable errors; Bandwidth; Bit error rate; Coaxial components; Forward error correction; Frequency; Gaussian noise; Nonlinear distortion; Optical distortion; Optical noise; Quadrature amplitude modulation;
Journal_Title :
Broadcasting, IEEE Transactions on
