Abstract: A positioning device receives positioning signals from multiple positioning satellites respectively provided by multiple positioning systems, selects one or more use systems to be used in a positioning calculation processing among the multiple positioning systems based on a determination of whether a surrounding environment is an environment in which a multipath is likely to occur, and performs the positioning calculation processing by using the positioning signals from the positioning satellites provided by the positioning systems selected as the use systems.

Abstract: System and method for concurrently protecting Iridium and GPS L1/L2 band received satellite signals against interference signals (e.g., jamming signals) using space-time adaptive processing (STAP). While the GPS signal is protected against jamming using Nulling of the interfering signals, the Iridium signal is protected using Beamforming. A single broadband small controlled reception pattern antenna (sCRPA) array receives both the GPS (L1 and L2) and Iridium signals for the STAP-based antijam solutions outputting filtered Iridium and GPS signals. Use of a common (small) broadband antenna and common front end signal processing of the received signals enables an integrated system for use on size, weight, and power constrained platforms such as drones, unmanned aerial vehicles (UAVs), and helicopters.

Abstract: A method for operating a correction service system (CSS), for a satellite navigation system (SNS), having reference-stations (RS) (in a coordinate-system (CS)) having known/fixed coordinates, the RS being operated to receive satellite signals, at least one correction-value (CV) being predefined as a function of the signals received by the selected RS and its coordinates, and is provided to user-devices of the SNS, the at least one CV being checked for plausibility. The CSS divides the CS into multiple-regions, in which user-devices determine an individual position as a function of the plausibility of the received CV, at least one specific-region being selected as a function of the plausibility of the CV, the specific-region(s) being assigned the at least one CV, at least one information-packet being generated, which contains indications about the plausibility of the CV and the specific-region(s), the information-packet(s) being provided to at least one selected group of user-devices.

Abstract: Systems and methods can support a portable aperture array antenna system having a support structure of a substantially hemispherical geometry formed of a plurality of rigid linear elements. A membrane may be positioned upon an outer surface of the support structure. A plurality of antenna elements may be positioned coplanar to the membrane. A radio frequency transmission assembly may operate to couple output signals from the antenna elements into one or more signal-processing modules. The signal-processing modules may be configured to model the motion of two or more satellites, focus electromagnetic beams in the respective directions of the satellites, and steer the electromagnetic beams from horizon to horizon to follow the satellites simultaneously without motion of physical components.

Abstract: A system and related method for determining precision navigation solutions is disclosed. The system decorrelates GPS carrier-phase ambiguities derived from multiple-source GPS information via Least-squares AMBiguity Decorrelation Adjustment (LAMBDA) algorithms. The set of decorrelated floating-point ambiguities is used to compute protection levels and the probability of almost fix (PAF), or the probability that the partial almost-fix solution corresponding to the decorrelated ambiguities is within the region of correctly-fixed or low-error almost-fixed ambiguities.

Abstract: A positioning device receives multiple positioning signals respectively transmitted from multiple positioning satellites, changes a condition of the positioning satellites to be used in a positioning calculation processing based on a determination of whether a surrounding environment is an environment in which a multipath is likely to occur, and performs the positioning calculation processing by using the positioning signals from the positioning satellites that satisfy the condition.

Abstract: An apparatus for indicating a direction of a radio transmission is described. The apparatus includes at least one vector detection device including two or more antennas and an attenuating material between at least one of the antennas and a source of a radio transmission. The attenuating material is arranged to vary an amount of attenuation with an angle of the source with respect to at least one of the antennas. The apparatus is configured to generate a signal indicating a direction of the radio transmission by comparing received signal strengths from the two or more antennas.

Abstract: A tones processing system including an interference tone determination module (ITDM), an interference tone tracker module (ITTM) and an interference tone removal module (ITRM) is provided. The ITDM sequentially searches for one or more continuous wave interference (CWI) tones in N samples of intermediate frequency (IF) data within a programmable signal frequency band. The ITTM tracks the detected CWI tones. The ITRM removes the tracked CWI tones from the N samples of IF data using one or more interference tone removal units (ITRUs). Each of the ITRUs includes a second signal generator, a second mixer, a tone filter for suppressing the tracked CWI tones, and a quantizer for reducing the number of processing bits in a tone suppressed output signal. The ITRM performs frequency shift compensation and phase rotation compensation with reduced logic area and power consumption in the global navigation satellite system receiver.

Abstract: Methods, devices, and systems for tracking an asset are provided. In particular, a device is provided that includes an array of sensors and communications modules configured to detect tracking information, including environmental conditions and physical events, and report the tracking information along with a geographical location of the device to a control server across a wireless network. Upon receiving the tracking information, the control server interprets the information and generates tracking reports for the device configured to be displayed to a graphical user interface of a third-party communication device.

Abstract: A positioning method and apparatus for a mobile terminal, and a mobile terminal. After a first time period elapses, a main processor obtains M pieces of reliable navigation data from N pieces of buffered navigation data of the mobile terminal, and obtains K pieces of buffered position change data of the mobile terminal. The main processor combines the M pieces of reliable navigation data and the K pieces of position change data, to obtain position information of the mobile terminal in the first time period. The N pieces of navigation data are obtained through calculation by using a satellite navigation signal of the mobile terminal that is received during the first time period. The K pieces of position change data are obtained through calculation by using data that is obtained through monitoring by a sensor of the mobile terminal during the first time period.

Abstract: Disclosed is a technique that can provide one or more countermeasures against spoofers. A beamformer can control an antenna pattern of a CRPA to generate a survey beam. The survey beam is swept across space to determine a characteristic signature based on carrier-to-noise ratios (C/No) for particular space vehicle signals. Matching C/No signatures can be used to identify the existence of spoofers and invoke a countermeasure, such as nulling.

Abstract: Provided is a radio source position estimation system including a plurality of radio transmission devices spaced a predetermined distance apart from one another and configured to transmit radio frequency (RF) signals received from an arbitrary radio source and a central radio reception device configured to estimate a position of the radio source using the RF signals received from at least three radio transmission devices.

Abstract: Disclosed is a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G communication system such as LTE. Provided in the present disclosure is a relay-based communication method for a communication terminal provided in a vehicle, comprising the steps of: acquiring global positioning system (GPS) coordinates of the vehicle; determining a traveling direction of the vehicle on the basis of map information and the GPS coordinates; sensing a traveling lane of the vehicle; generating a location code including information on the GPS coordinates, the traveling direction, and the traveling lane; and generating a message, which includes the generated location code, and transmitting the message.

Abstract: A system for estimating a location of a source transmitting a spectral-diversity signal having a known form but at least one unknown parameter is disclosed. The system comprises signal receiving circuits, each receiving the spectral-diversity signal and computing, for each signal carrier component in the spectral-diversity signal, a cross-ambiguity function based on the known form and on the received spectral-diversity signal. A central processor circuit estimates the location of the source, by calculating an extremum of an objective function constructed from all the cross-ambiguity functions.

Abstract: According to an embodiment, an apparatus for precise position correction using a positioning difference comprises a first distribution information obtaining unit gathering first distribution information from an external terminal, a global navigation satellite system (GNSS) receiver obtaining a GNSS positioning value of the apparatus based on a GNSS, and a positioning correcting unit obtain a corrected location of the apparatus by correcting the GNSS positioning value using the gathered first distribution information. The first distribution information includes a GNSS positioning value of the external terminal, a GNSS positioning time, a precise positioning value, and a positioning difference between the GNSS positioning value and the precise positioning value.

Abstract: An apparatus includes a phased array antenna panel and one or more dual-polarization beam former circuits mounted on the phased array antenna panel. The phased array antenna panel generally comprises a plurality of dual-polarization antenna elements. The plurality of dual-polarization antenna elements are generally arranged in one or more groups. Each dual-polarization beam former circuit may be coupled to a respective group of the dual-polarization antenna elements. Each dual-polarization beam former circuit generally comprises a plurality of transceiver channels. Each transceiver channel generally comprises a horizontal channel and a vertical channel. Each dual-polarization beam former circuit provides polarization rotation through bias current control in each of the vertical and horizontal channels.

Abstract: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). An electronic device including a first radio frequency (RF) chip and a second RF chip is provided. The electronic device includes a modem configured to transmit a first clock signal to the second RF chip, the first RF chip connected to the modem and configured to receive a second clock signal from the modem, and the second RF chip electrically connected to the first RF chip through a transmission line and configured to receive the second clock signal from the first RF chip and to measure a phase of the transmission line based on the first clock signal and the second clock signal. The first clock signal and the second clock signal have different frequencies.

Abstract: Systems, devices, and methods for determining and applying true time delay (TTD) values for compensating for free-space path length differences between a phased array and a reflector in wideband communication are disclosed. TTD values are determined for individual and groups of antenna elements in phased array fed reflector (PAFR) antennas based distances from a focal region of the reflector. The distance from the focal region of the reflector and the offset of the phased array from the reflectors focal plane can be used to determine path length differences. Corresponding TTD values for antenna elements are then determined based on the path length difference associated with the antenna elements. Each antenna element can be coupled to a TTD element to provide the corresponding TTD value to the signals received by and generated by the antenna elements of the phased array. The TTD elements include transverse electromagnetic (TEM) mode mechanisms.

Abstract: A system for determining a relative position associated to a first receiver and a second receiver includes a code module 402 configured to receive location data associated to the first receiver, receive location data associated to the second receiver, and determine a first estimate relative position associated to the first receiver and the second receiver; a float module 404 configured to determine a second estimate relative position associated to the first receiver and the second receiver at least partly from the first estimate relative position; a fix module 406 configured to determine a third estimate relative position associated to the first receiver and the second receiver at least partly from the second estimate relative position; and a sidereal module 408 configured to determine a fourth estimate relative position associated to the first receiver and the second receiver at least partly from the third estimate relative position.

Abstract: An electronic device, a control method, and a non-transitory computer-readable recording medium are disclosed. In one embodiment, an electronic device comprises a position detector, a communication unit, and at least one processor. The position detector is configured to detect position information of the electronic device based on a signal output by a satellite. The communication unit is configured to communicate with another device. When the at least one processor determines that detection accuracy of the position detector has deteriorated when a detecting function of the position detector is valid, the at least one processor reduces communication with the another device.