Wireless CATV network access for personal communications usingsimulcasting

摘要

Existing cable television (CATV) networks are proposed as a meansnto interconnect wireless terminals to terrestrial networks and services.nDiscrete antennas, each controlled by a remote antenna driver (RAD), arenseparated by 250 m along a cable to provide wireless access. RAD'sntransceive as a group on any active channel, and are controlled by anremote antenna signal processor (RASP) which interconnects to the publicnswitched telephone network, or other broad-band network. Simulcastninterference caused by transmissions involving the RAD's is analyzed. Itnis determined that communication is feasible, even in the simulcastninterference zone, provided the time delay difference caused byndifferences in path length traveled by simulcast signals with comparablenpower levels is a small fraction of the signal pulse duration. Emphasisnhere is on the CT2 air interface with its 72 kb/s baud rate. Thenpossible effects of cable transmission delay on the time-division duplexn(TDD) transmission algorithm are considered. Some discussion involvingncommunications through walls or around obstructions is included