Patent ID: 9515723
Filing Date: 2016-12-06
CPC Classification: H03F,H04B

Claim Text:
1. An apparatus comprising: a signal input configured to receive a source digital data signal comprising a plurality of source digital data symbols; an encoder configured to receive the source digital data signal and to encode the source digital data signal to generate a corresponding encoded digital signal; a modulator configured to receive the encoded digital signal and to modulate the encoded digital signal for transmission over one or more satellite communications channels by mapping each source symbol to a respective signal constellation point of an applied signal constellation to generate a modulated signal; a pre-distorter configured to receive the modulated signal and to pre-distort the modulated signal based on a distortion estimate to generate a pre-distorted signal; a filter configured to receive the pre-distorted signal and to filter the pre-distorted signal to generate a filtered signal; and a transmitter configured to receive the filtered signal and to frequency translate and amplify the filtered signal to generate a one transmission signal for transmission to a satellite via an uplink channel of the one or more satellite communications channels; and wherein, to increase system throughput, the source digital data signal is processed through the apparatus and the resulting transmission signal is generated based on a transmission symbol rate that is configured as a faster than Nyquist (FTN) symbol rate 1 /τ that is greater than one, and wherein the distortion estimate is configured to pre-compensate at least for distortion that would result from one or more of the transmission of the one transmission signal via the uplink channel to the satellite and distortion that would result from one or more adjacent transmission signals combined by the satellite with the one transmission signal as a composite transmission signal and collectively processed by a transponder of the satellite.