Patent ID: 7110048
Filing Date: 2006-09-19
Classification: H04N

Abstract:
1. A method for synchronizing a plurality of digital RF transmitters that are supplied a common digital signal for RF modulation and subsequent transmission on a common channel throughout a prescribed region, whereby RF receivers within said region may receive transmissions on said channel from more than one transmitter, said method comprising the steps of: generating a digital signal comprising informational data and formatting data; inserting reference data into said digital signal; transporting said digital signal with said reference data to said plurality of transmitters, each transmitter having channel coding, RF modulation and power amplification; setting said channel coding of each transmitter at specific times into the same known states relative to said digital signal in response to receipt of said reference data; at each transmitter, channel coding said digital signal, modulating the resultant channel coded digital signal onto a channel carrier and power amplifying the resultant modulated signal after the states have been set; and transmitting the resultant amplified modulated signal at each transmitter, whereby the modulated signals transmitted by said plurality of transmitters will be substantially identical to one another, so that said receivers in said region will be able to properly recover the informational data when receiving signals from multiple transmitters.