摘要:
This disclosure relates to a location positioning device, e.g. a Global Navigation Satellite System (GNSS) device, comprising: an analog front end (AFE) configured to: receive first and second navigation signal components transmitted by a satellite vehicle (SV), lowering the sampling rate of the first and second navigation signal components to a sampling rate of a baseband signal, and convert the first and second navigation signal components at the sampling rate of the baseband signal into digital domain to form a digital baseband first and second navigation signal components; and a baseband processor configured to determine a positioning measurement based on a combination of the digital baseband first and second navigation signal components.
摘要:
Antenna apparatus and a method of operating the antenna apparatus are provided. The antenna apparatus comprises a directional antenna comprising a plurality of antenna array components, a plurality of RF chains connected to the plurality of antenna array components, and a transceiver connected to the plurality of RF chains. Each RF chain comprises in sequence: a switching stage having switching circuitry selectively to connect an antenna array component, a phase shifting stage having phase shifting circuitry, and a summation stage having summation circuitry, wherein at least two of the RF chains share phase shifting circuitry and at least two of the RF chains share summation circuitry. The at least partial sharing of the RF chains, an in particular of the phase shifting circuitry provides a compact and cheap antenna apparatus, which is nonetheless capable of degree of configurability in direction and beam pattern to enable it to operate in a busy and changing environment.
摘要:
A rotatable antenna apparatus is provided that has both a fixed unit for attachment of the apparatus to an external structure, and a rotatable unit mounted on the fixed unit and comprising an antenna assembly and processing circuitry coupled to the antenna assembly for performing signal processing operations. An interface unit is coupled to both the fixed unit and the rotatable unit, and is used to route a cable to provide a wired connection from the fixed unit to the processing circuitry. The interface unit includes a cable housing within which a length of the cable is enclosed in a coiled arrangement. A control mechanism that is coupled to the interface unit is then arranged to constrain the amount to which the length of cable is wound and unwound within the cable housing so as to inhibit application of a stretching stress on the cable during rotation of the rotatable unit. This provides a very efficient and cost effective mechanism for providing a wired connection to the processing circuitry included within the rotatable unit.
摘要:
A feeder terminal comprises backhaul communication circuitry to connect to a communications network via a wireless backhaul, and provide an access base station with access to the wireless backhaul. Backhaul information circuitry determines congestion information relating to the wireless backhaul and communication circuitry enables communication with an access base station and provides the congestion information to the access base station. In response to a demand message from the access base station comprising quality of service requirements, the communication circuitry forwards the demand message to the communications network. Additionally, an access base station comprises communication circuitry to enable communication with a feeder terminal. Backhaul communication circuitry connects to a communications network via a wireless backhaul provided by the feeder terminal, and provides the user equipment with access to the wireless backhaul. Requirement determination circuitry determines at least one quality of service requirement from the user equipment; and access control circuitry selectively controls usage of the wireless backhaul by the user equipment. The communication circuitry provides a quality of service demand message to the feeder terminal based on the at least one quality of service requirement and receives congestion information relating to the wireless backhaul from the feeder terminal. The access control circuitry controls usage of the wireless backhaul by the user equipment in dependence on the congestion information.
摘要:
An antenna apparatus is provided for operating as a base station in a wireless network, along with a method of configuring a transmission beam within such an antenna apparatus. The antenna apparatus has a rotatable antenna assembly that can employ transmission beam patterns selected from a plurality of transmission beam patterns, and has a controller to rotate the rotatable antenna assembly in order to alter an azimuth direction of the rotatable antenna assembly. During a configuration mode, a sweep operation is performed in order to rotate the rotatable antenna assembly to each of multiple selected azimuth directions. Quality metric determination circuitry then determines, for each selected azimuth direction, a link quality metric for each of a plurality of wireless terminals based on communication between the plurality of wireless terminals and the base station whilst the rotatable antenna assembly is at that selected azimuth direction. Transmission beam determination circuitry then determines, from the link quality metrics determined for the plurality of wireless terminals at each selected azimuth direction, both a transmission beam pattern and an azimuth direction to be used for subsequent communication with the plurality of wireless terminals. This provides a particularly efficient mechanism for the antenna apparatus to self configure its transmission beam pattern and azimuth direction.
摘要:
The present method and system can be used for indoor positioning where navigation satellite signals are unavailable. According to the method, features identifying the location of a mobile terminal in a defined position are determined on the basis of data received from at least one inertial and non-inertial sensor during the movement of at least one mobile terminal; the trajectory of movement of the above-mentioned mobile terminal in a local coordinate system associated with the above-mentioned position and also data from non-inertial sensors are defined and stored; statistically averaged conversion parameters of the local coordinate systems of the mobile terminal in positions defined during the movement of the terminal are generated; at least one map of the distribution of outputs from the non-inertial sensors is generated on the basis of the data obtained in the previous step; the position of the above-mentioned mobile terminal is defined on the basis of the data obtained in the previous step. The system consists of a plurality of mobile terminal sensors, a computer, a probability calculation module, a feature determination module, a set of data banks and a coordinate converter.
摘要:
Systems and methods for estimating whether a receiver is indoors or outdoors. Certain approaches evaluate data associated with a network of beacons to determine whether the receiver is indoors or outdoors. Such evaluation may include any of determining whether azimuthal angles corresponding to the beacons meet an azimuthal angle condition, determining whether elevation angles corresponding to the beacons meet an elevation angle condition, determining whether signal strengths corresponding to the beacons meet a signal strength condition, and determining whether other measurements associated with the beacons meet other measurement conditions (710).