APPLICATION OF DIGITAL PROCESSING SCHEME FOR ENHANCED CABLE TELEVISION NETWORK PERFORMANCE

摘要

Fiber-hybrid using a baseband serial optical transmission system and a method of increasing the performance of a digital return path in a coaxial cable TV system, A / D converter with a first comparator input to a digital return transmitter that includes a nonlinear processor an analog composite return path waveform receives. A first processing function of the first signal is applied, and processing a signal output from the comparator in a non-linear processor is sent to the A / D converter, the A / D converter quantization of a sequence of digital words whose value represent analog signal samples and it converts the processed signal to produce an output signal. The quantized digital signal is output to the feedback loop comprising the output of the digital return transmitter and, D / A converter, D / A converter converts the quantized digital signal to an analog feedback signal, and an analog feedback signal to a second processor, It transmits. The second processor outputs a feedback analog signal is applied to a second processing function to the analog feedback signal to the comparator input and processing of the digital return transmitter. The comparator input to the digital return transmitter generates a signal that is output from the comparator in addition to the analog feedback signal processing to the analog composite return path waveform.