Patent ID: 7656966

Claim:
In a digital data transmission system including a transmitter for transmitting signals, a terrestrial repeater comprising: a receiving unit for detecting at least one of a first transmit signal and a second transmit signal, the first transmit signal transmitted from a first communication satellite and produced when the transmitter modulates a primary and a secondary data on a first carrier wave associated with the first communication satellite, and the second transmit signal transmitted from a second communication satellite and produced when the transmitter modulates the primary and the secondary data on a second carrier wave associated with the second communication satellite, wherein said receiving unit comprises an antenna in communication with a tuner unit for receiving the first and the second transmit signals, wherein the primary and the secondary data are modulated on the first and the second carrier waves using a M-PSK modulating scheme, said receiving unit is adapted to receive the first and the second transmit signals. the first and the second transmit signals including primary data comprising one of OPSK, D-OPSK, and pi/4 D-OPSK modulated data, and said receiving unit is adapted to receive the first and the second transmit signals, the first and the second transmit signals including secondary data comprising modulated data in the form of a phase offset relative to the modulated primary data; an encoder for re-encoding the primary and the secondary data on a third carrier wave to form a third transmit signal; and a re-transmitter for transmitting the third transmit signal to a receiver.