Patent ID: 6512749
Filing Date: 2003-01-28
Classification: H04B

Abstract:
In a processing satellite communication system, apparatus for generating and transmitting data in an available spectrum of frequencies suitable for use by a downlink transmitting system of a processing satellite comprising in combination:a terminal connected to receive data cells for transmission; a scheduler connected to generate a first frame type signal and a second frame type signal; one or more encoders connected to group a predetermined number of the data cells with a predetermined error correction code; a frame organizer connected to generate from said data cells a first type of frame body in response to said first frame type signal and to generate a second type of frame body in response to said second frame type signal and to group the frame bodies with header symbols and with trailer symbols to generate data frames comprising a predetermined number of symbols; one or more modulators connected to modulate the data frames by a predetermined form of modulation to enable placement of the modulated data frames into a plurality of frequency bands having a predetermined frequency range and having a predetermined transmission rate definable in megasymbols per second; a radio frequency transmitter connected to transmit the modulated data frames over one or more beams with a predetermined form of polarization; and a gate arranged to reduce power in response to said second frame type signal.