226062 ⎘
Modulated-carrier systems; Carrier systems characterised by combinations of two or more of the types covered by groups , , or; Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems; Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel by providing an alternative to one signal point
Method to minimize interference into legacy SDARS reception by varying overlay modulation as a function of satellite position
#2Method of improving performance in a hierarchical modulation system
#3Method to minimize interference into legacy SDARS reception by varying overlay modulation as a function of satellite position
#4Method to increase performance of secondary data in a heirarchial modulation scheme
#5Apparatus and method for decoding in a hierarchical, modulation system
#6Method to increase performance of secondary data in a hierarchical modulation scheme