Abstract:
A method of determining a position location of an asset tag within an indoor position location system includes filtering a history of locations of an asset tag within the indoor position location system. Such a method further includes computing, based on the history, a likelihood that the asset tag is in a predetermined room of the indoor position location system.
Abstract:
A method for ground to air communication includes receiving a first pilot signal on a first wide beam from a first ground base station by a first antenna element covering a first range of azimuth angles from an aircraft. Data is received on a directed data beam from the first ground base station by the first antenna element. A second pilot signal is received on a second wide beam from a second ground base station by a second antenna element covering a second range of azimuth angles different than the first range of azimuth angles. A signal strength of the second pilot signal is compared with a signal strength of the first pilot signal. Data reception is switched from the first antenna element to the second antenna element if the signal strength of the second pilot signal is greater than the signal strength of the first pilot signal.
Abstract:
A ground station antenna is described herein including a moving feed plate with a first power transfer unit arranged on the moving feed plate. The ground station antenna also includes a fixed plate. The moving feed plate is configured to rotate with respect to the fixed plate. The fixed plate has a second power transfer unit. The first power transfer unit and the second power transfer unit are configured to transmit and receive modulated power signals between one another through a charging link. The modulated power signals comprise wireless charging power and data signals.
Abstract:
An air to ground communication system provides internet access to aircraft from ground based stations. The air to ground system shares spectrum with uplink portions of a satellite communication spectrum. Interference mitigation techniques are employed to avoid interference between the ground based communications and satellite communications. Fade mitigation techniques are employed to provide communication to aircraft at low angles of elevation in the presence of rain.
Abstract:
The present disclosure presents a method and an apparatus for communications in a non-geostationary orbit (NGSO) satellite network. For example, the method may include receiving data, at a relay node, from a first NGSO satellite of the NGSO satellite network, wherein the relay node is located at a boundary or a common beam area associated with the first satellite and a second satellite of the NGSO satellite network, and wherein the data is received at the relay node in response to identifying by the first NGSO satellite that an internet point of presence (IPP) is not available in at least one of a plurality of beams associated with the first NGSO satellite, and relaying the data from the relay node to a second NGSO satellite of the NGSO satellite network, wherein an IPP is available in at least one of a plurality of beams associated with the second NGSO satellite. As such, communications in a non-geostationary orbit (NGSO) satellite network may be achieved.
Abstract:
A ground station antenna including a torus shaped reflector having multiple feed points along a focal arc in front of the reflector. The ground station antenna includes transceiver feeds having their electrical phase centers located on the focal arc and supported by a rotating feed platform. The transceiver feeds are configured to simultaneously track rising and falling satellites when the platform rotates. The ground station antenna further includes a wireless power receiver coupled to the transceiver feeds to power the transceiver feeds. The ground station antenna further includes a wireless signal interface coupled to the transceiver feeds to communicate signals with a base unit to perform subsequent processing.
Abstract:
Techniques are provided which may be implemented in various methods, apparatuses, and/or articles of manufacture for use by a device that is operable in a plurality of modes, including “higher power mode” and a “lower power mode”. In an example implementation, a device that is operable in a plurality of selectable power modes may measure a signal strength value for a signal acquired from a ground-based transmitter, and transition operation to a lower power mode, wherein at least a portion of a receiver used to acquire the signal is disabled, based, at least in part, on: (a) a profile test indicating that the device is within a characterized environment, wherein the profile test is satisfied, at least in part, by the signal strength value; or (b) an indication based, at least in part, on the signal strength value, that the device is in a constrained motion state; or (c) both (a) and (b).
Abstract:
Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).
Abstract:
A high gain multi-beam aircraft blade antenna of an air-to-ground antenna systems includes multiple columnar matrix antenna elements housed within a blade. The elements are arranged to create independently steerable directed beams. A first independently steerable beam is used to provide communication. A second independently steerable beam is used to simultaneously search other signals.
Abstract:
An indoor position location system. The indoor position location system may include a narrowband messaging link. The narrowband messaging link may enable synchronization and ranging initialization between asset tags and access points of the indoor position location system. The indoor position location system may also include a wideband ranging link. The wideband ranging link may enable a ranging operation between the asset tags, the access points and a position location server of the indoor position location system. The position location server may determine a location of at least one of the asset tags according to the ranging operation.