Signal cancellation in a satellite communication system

摘要

A satellite communication system comprised of a hub and plurality of remote terminals, wherein the system is configured for frequency reuse, a method and apparatus for signal cancellation are disclosed. The disclosed method and apparatus enable the hub to extract return link signals overlaying a transmitted forward link signal, wherein the forward link signal is transmitted at a power level higher than that of the overlaying return link signals.

主权项

1. A method comprising:
transmitting a signal; receiving a combined signal comprising a relayed version of the transmitted signal and one or more additional signals; demodulating a sample of the transmitted signal to produce a first demodulation output; demodulating the received combined signal to produce a second demodulation output; correlating a first set of symbols corresponding to the first demodulation output with a second set of symbols corresponding to the second demodulation output to determine an offset between the relayed version of the transmitted signal included in the combined signal and the transmitted signal; and canceling the relayed version of the transmitted signal from the combined signal.