Satellite for increasing the utility of satellite communication systems

摘要: An existing TDRSS satellite communication system is incorporated, together with low-power ground-based remote transceivers of special design, and additional beam forming steering elements at the ground terminals, to make possible digital between low power field terminals. The transmits its terminals a composite signal, comprising amplified, phase-coherent signals received by an array broad-coverage antennas on satellite. transceiver pseudonoise coded signal spread across all or portion satellite's receive bandwidth. At terminal, downlinked processed beamformer define narrow, high-gain transceiver. Signal processing gain in combination serve elevate received, demodulated well above noise level receiver. Through this invention, large multiplicity non-interfering reverse-link (remote-to-central) narrow-band channels may be supported host nature described. By introduction forward link into scheduling transmissions set along normal transmit activities, highly useful two-way can extended class users not initially served system.