摘要:
A radioterminal communications system includes an ancillary terrestrial component configured to receive from at least some of a plurality of radioterminals using frequencies from a first satellite frequency band (e.g., an L-band) and to transmit to at least some of the plurality of radioterminals using frequencies from a second satellite frequency band (e.g., an S-band). The system further includes a space-based component configured to communicate with the plurality of radioterminals using at least some of the frequencies from the first satellite frequency band and/or at least some of the frequencies from the second satellite frequency band.
摘要:
A satellite is used to route push-to-send messages among terrestrial base stations. Reduced push-to-send delays thereby may be provided, when a source push-to-send radioterminal is widely separated from a destination push-to-send radioterminal. Satellite routing only may be used when the source push-to-send radioterminal and the destination push-to-send radioterminal are not communicating with a single terrestrial base station or with a group of terrestrial base stations that are proximate one another. A destination base station that is communicating with the destination push-to-send radioterminal may be determined at the satellite, at a satellite gateway and/or at a central server.
摘要:
A first and/or a second communications system may provide communications service over a geographic area. A method of operating the first and/or the second communications systems may include generating a measure of aggregate interference reaching a satellite of the second communications system substantially from devices of the first communications system. The measure of aggregate interference reaching the satellite of the second communications system may be transmitted to an element of the first communications system.
摘要:
A first and/or a second communications system may provide communications service over a geographic area. A method of operating the first and/or the second communications systems may include generating a measure of aggregate interference reaching a satellite of the second communications system substantially from devices of the first communications system. The measure of aggregate interference reaching the satellite of the second communications system may be transmitted to an element of the first communications system.
摘要:
A radioterminal communications system includes an ancillary terrestrial component configured to receive from at least some of a plurality of radioterminals using frequencies from a first satellite frequency band (e.g., an L-band) and to transmit to at least some of the plurality of radioterminals using frequencies from a second satellite frequency band (e.g., an S-band). The system further includes a space-based component configured to communicate with the plurality of radioterminals using at least some of the frequencies from the first satellite frequency band and/or at least some of the frequencies from the second satellite frequency band.
摘要:
A radioterminal may include a transceiver, a hand-held interface coupled to the transceiver, and an interlock coupled to the transceiver. The transceiver may be configured to transmit and receive wireless communications, and the transceiver may be further configured to transmit high power communications at a high maximum power and/or EIRP and to transmit low power communications at a low maximum power and/or EIRP. The interlock may be configured to prevent the transceiver from transmitting high power communications at a power and/or EIRP that exceeds a threshold when the hand-held interface is activated. Related methods are also discussed.
摘要:
A radioterminal may include a transceiver, a hand-held interface coupled to the transceiver, and an interlock coupled to the transceiver. The transceiver may be configured to transmit and receive wireless communications, and the transceiver may be further configured to transmit high power communications at a high maximum power and/or EIRP and to transmit low power communications at a low maximum power and/or EIRP. The interlock may be configured to prevent the transceiver from transmitting high power communications at a power and/or EIRP that exceeds a threshold when the hand-held interface is activated. Related methods are also discussed.
摘要:
A radioterminal may include a transceiver, a hand-held interface coupled to the transceiver, and an interlock coupled to the transceiver. The transceiver may be configured to transmit and receive wireless communications, and the transceiver may be further configured to transmit high power communications at a high maximum power and/or EIRP and to transmit low power communications at a low maximum power and/or EIRP. The interlock may be configured to prevent the transceiver from transmitting high power communications at a power and/or EIRP that exceeds a threshold when the hand-held interface is activated. Related methods are also discussed.
摘要:
A processor for use in a satellite communications system includes a selector that is configured to select a subset of a plurality of spatially diverse satellite signals based upon a location of a radioterminal. The processor further includes a signal processor that is configured to detect a return-link transmission from the radioterminal responsive to the selected subset of the spatially diverse satellite signals. The respective spatially diverse satellite signals may include respective signals corresponding to respective antenna elements of a satellite. The selector and the signal processor may be ground based.
摘要:
Satellite communications methods include receiving communications signals including co-channel interference at a space-based component from a plurality of wireless terminals in a satellite footprint over a satellite frequency band and reducing interference in the communication signals by (a) performing co-channel interference reduction on the communications signals to generate a plurality of interference reduced signals and (b) performing multiple access interference cancellation on the interference reduced signals. An interference reducing detector for a satellite communications system includes an interference reducer configured to perform co-channel interference reduction on communications signals to generate a plurality of interference reduced signals, and a detector configured to perform multiple access interference cancellation on the interference reduced signals. Satellite communications systems and satellite gateways including interference reducing detectors are also disclosed.