Patent ID: 8259641
Filing Date: 2012-09-04
Classification: H04B,H04L,H04N

Abstract:
1. A system for uplinking a layered modulation signal, the layered modulation signal comprising an upper layer signal having an upper layer signal constellation of first symbols and a lower layer signal having a lower layer signal constellation of second symbols non-coherently layered over the upper layer signal constellation of first symbols, the system comprising: a first receiver for receiving a first feeder link signal for a first satellite transponder on a first satellite, the first satellite transponder transmitting the upper layer signal of the layered modulation signal to at least one receiver; a second receiver for receiving a second feeder link signal for a second satellite transponder on a second satellite, the second satellite transponder transmitting the lower layer signal layered over the upper layer signal of the layered modulation signal to the at least one receiver; wherein the second feeder link signal reuses a frequency band of the first feeder link signal and the first satellite and the second satellite have an orbital separation sufficient to allow reuse of the frequency band.