Patent ID: 7869533

Claim:
A communication system comprising: at least one transmitter that transmits high priority and low priority signals, wherein said high priority and low priority signals are hierarchically modulated and transmitted as a single frequency network; at least one satellite in communication with said at least one transmitter, wherein said at least one satellite receives said high priority and said low priority signals from said at least one transmitter and re-transmits said high priority signal in a first circularly polarized direction and said low priority signal in a second circularly polarized direction; and a plurality of receivers in communication with said at least one satellite, wherein said plurality of receivers comprise at least one of a first receiver having an antenna that is configured to receive said high priority signal in said first circularly polarized direction and switched to receive said low priority signal in said second circularly polarized direction, and a second receiver having two antennas such that a first antenna is configured to receive said high priority signal in said first circularly polarized direction and a second antenna is configured to receive said low priority signal in said second circularly polarized direction substantially simultaneously.