A satellite receiver includes a down converter for providing a received signal and a demodulator having at least two demodulation modes for demodulating the received signal, wherein one demodulation mode is hierarchical demodulation and another demodulation mode is layered demodulation....http://www.google.fr/patents/US7532683?utm_source=gb-gplus-shareBrevet US7532683 - Unified receiver for layered and hierarchical modulation systems
Unified receiver for layered and hierarchical modulation systems
