Abstract:
In a satellite communications network, local pools of available carriers are assigned to each ground earth station GES by a network channel management station NCMS, which stores a pool of unallocated carriers. If the number of unused carriers in a local pool falls below a predetermined level, additional carriers are allocated from a regional pool in the network channel management station NCMS. If the number of carriers in a local pool exceeds a predetermined level, the excess carriers are released to the regional pool so that they can be allocated to local pools in other ground earth stations GES.
Abstract:
An existing TDRSS satellite communication system is incorporated, together with low-power ground-based remote transceivers of special design, and additional beamforming and steering elements at the ground terminals, to make possible digital communication between low power field transceivers and satellite ground terminals. The satellite communication system transmits to its ground terminals a composite signal, comprising amplified, phase-coherent signals received by an array of broad-coverage antennas on the satellite. The field transceiver transmits a pseudonoise coded signal spread across all or a portion of the satellite's receive bandwidth. At the ground terminals, the downlinked composite signal is processed by a beamformer to define a narrow, high-gain beam between the satellite and low-power transceiver. Signal processing gain and beamformer gain in combination serve to elevate the received, demodulated signals well above the noise level at the receiver. Through this invention, a large multiplicity of non-interfering reverse-link (remote-to-central) communication channels may be supported by a host satellite communication system of the nature described. By the introduction of forward link signal channels into the satellite ground terminal, and scheduling of forward link transmissions to the set of low-power remote transceivers along with normal transmit activities, highly useful two-way communication can be extended to a class of users not initially served by the satellite communication system.
Abstract:
Each of the communications satellites going around the earth is equipped with a plurality of transmitters and receivers including receiving antennas in order to be able to transmit and receive signals in a plurality of directions, and a transmitter and a receiver in order to be able to transmit and receive signals between the closest terrestrial communications equipment. Each communications satellite is equipped with a cross-connect equipment, and has a function of transmitting signals that are received from each of the receivers toward other directions by utilizing the cross-connect equipment. The communications satellites and the terrestrial communications equipment have respectively a function of transmitting and receiving signals consisting of communications frames having at their head address signals that indicate to which terrestrial communications equipment of the transmission destination they are intended for every time slot. Each communications satellite is equipped with four or more receivers to receive signals, and a cross-connect equipment which distributes the signals received by these receivers into four or more groups according to the transmitting terrestrial communications equipment based on the address signal for every time slot.
Abstract:
Detailed mapping of the magnetosphere is made possible by deploying hundreds of attitude-impervious microsatellites, in the form of small corner reflectors with piezoelectric mirror surfaces, from a single mother satellite at spacings of as little as 1 km in equatorial and elliptical orbits. The microsatellites carry magnetosensors whose output is transmitted to a ground station by modulating the reflection of a laser beam transmitted to the microsatellite by the ground station. Various refinements of the laser data link are also disclosed.
Abstract:
A method and apparatus are provided for generating a personalized radio channel playlist by simultaneously buffering multiple received channels from one or more source streams, and then selecting songs or tracks to playback from the buffered channels. Users can specify favorite channels for building their personal playlists, or multiple default playlist channels can be provided by genre or channels related in some other way. Navigation tools permit users to skip ahead and backward in the playback stream. A personalized radio channel playlist can be implemented as (1) content selected from buffered channels based on user preferences for artists, songs and the like, or (2) as a Mix Channel in which content from selected buffered channels is automatically mixed for playback in response to selection of a preset button assigned to the Mix Channel.
Abstract:
A monitoring system and associated methodology for response to incidents sensed by at least one sensor of an individual signal unit includes transmission to a central control facility by the individual signal unit, of at least a unique identifying code for that individual signal unit, over a communication network; the response includes a transmission of data from said central control facility to one or more recipients nominated by a registered owner of the individual signal unit wherein registration of the individual signal unit and configuration of sensing and of said response is via a web-based interface.
Abstract:
In one example, an antenna system is described. The antenna system includes a primary antenna on an aircraft. The primary antenna is mechanically steerable and has an asymmetric antenna beam pattern with a narrow beamwidth axis and a wide beamwidth axis at boresight. The antenna system also includes a secondary antenna on the aircraft, the secondary antenna including an array of antenna elements. The antenna system also includes an antenna selection system to control communication of a signal between the aircraft and a target satellite via the primary antenna and the secondary antenna. The antenna selection system switches communication of the signal from the primary antenna to the secondary antenna when a performance characteristic for communication with the target satellite satisfies a threshold due to a position of the aircraft relative to the target satellite.
Abstract:
A method comprising transmitting signals to one or more communications devices within a radio coverage area provided by infrastructure equipment, the infrastructure equipment forming either part of a non-terrestrial network of a wireless communications network and wherein the radio coverage area forms a spot beam of the non-terrestrial network, or part of a terrestrial network and wherein the radio coverage area is a cell of a terrestrial network, wherein the transmitting the signals includes transmitting signalling information indicating that one or more neighbouring coverage areas to the radio coverage area provided by the infrastructure equipment are either formed by a spot beam of a non-terrestrial network, a spot beam of the non-terrestrial network of which the infrastructure equipment forms part, a cell of a terrestrial network or a cell of the terrestrial network of which the infrastructure equipment forms part.
Abstract:
An integrated analog to digital converting and digital to analog converting (ADDA) RF transceiver for satellite applications, configured to replace conventional analog RF down and up conversion circuitry. The ADDA RF transceiver includes one of more ADCs, DSPs, and DACs, all on a single ASIC. Further, the circuitry is to be radiation tolerant for high availability and reliability in the ionizing radiation environment present in the space environment.
Abstract:
A system for Vehicle-to-Everything (V2E) communication includes servers configured to communicate over a Wide Area Network with one local signaling device of a vehicle in a real-time or near real-time. The servers are further configured to register the local signaling device of the vehicle to utilize third-party provided functions provided by third party devices or sensors coupled to, or operating on a same Local Area Network as, the local signaling device, the third-party devices or sensors selectable by a registering entity from a plurality of third-party devices or sensors. The registration includes configuring predefined steps to be taken by the servers in connection with the third party-provided functions of the third-party devices or sensors. The servers are further configured to receive a communication signal from the local signaling device of the vehicle, and in response to receiving the communication signal, execute the predefined steps.