Performance of a RS-coded QPSK cable modem for TDMA communication over the return channel of HFC networks

摘要

This paper deals with communication over the return path channel of a cable TV (CATV) network designed as a HFC network. First, the main impairments are identified to be ingress noise and impulse noise. A TDMA receiver scheme suited for this application is then derived. It is shown that the performance of such a TDMA system substantially improves by using equalization to combat peaks in the ingress spectrum. With respect to impulse noise, error probability calculations are presented to determine the level of error correction that is required in order to obtain the target bit error rate of 10~-8.