Embodiments of the disclosure are drawn to apparatuses, systems, and methods for radio direction finding with an iterative ambiguity resolution algorithm. An antenna array may receive an emitted signal. Two or more phase shifts in the received emitted signal may be determined between two or more pairs of antennas of the antenna array. A set of possible expected phase shifts may be generated from at least two of the measured phase shift. To determine the proper one of the set of expected phase shifts, a set of initial guesses for parameters of a fitting equation may be generated and then each may be optimized to determine optimized fitting parameters. From these optimized fitting parameters a direction of arrival of the emitted signal may be determined.

Embodiments of the disclosure are drawn to apparatuses, systems, and methods for radio direction finding with an iterative ambiguity resolution algorithm. An antenna array may receive an emitted signal. Two or more phase shifts in the received emitted signal may be determined between two or more pairs of antennas of the antenna array. A set of possible expected phase shifts may be generated from at least two of the measured phase shift. To determine the proper one of the set of expected phase shifts, a set of initial guesses for parameters of a fitting equation may be generated and then each may be optimized to determine optimized fitting parameters. From these optimized fitting parameters a direction of arrival of the emitted signal may be determined.

User equipment (UE), an enhanced NodeB (eNB) and method of improving positioning accuracy and enabling vertical domain positioning of the UE are generally described. The UE may receive a prsInfo control signal having at least one PRS configuration and subsequently a plurality of Reference Signals (RSs). The RSs may have a first Positioning Reference Signal (PRS) pattern in a first set of PRS subframes and a second PRS pattern in a second set of PRS subframes received prior to a subsequent first set of PRS subframes. The RSs may have a vertical positioning RS and a lateral positioning RS. The UE may measure PRS resource elements (REs), each having a PRS, in the first and second PRS pattern. The UE may transmit a measurement of the PRS in the first and second PRS pattern. The patterns may enable horizontal and vertical positioning to be determined.

A computer system for angle of arrival estimation receives one or more snapshots from a circular array of antennas. The computer system processes the one or more snapshots for amplitude and/or phase-based direction finding using two cascaded algorithms. The first algorithm of the two cascaded algorithms is configured to identify a target subregion from which a signal arrives. The second algorithm of the two cascaded algorithms is configured to identify a direction of the signal within the target subregion.

A method for calibrating spatial errors induced by phase biases having a detrimental effect on the measurements of phase differences of radio signals received by three unaligned receiving antennas of a vehicle. An inter-satellite angular deviation of a pair of satellites is estimated in two different ways: on the basis of the respective positions of the vehicle and of the satellites to obtain a theoretical inter-satellite angular deviation; and on the basis of the respective directions of incidence of the satellites relative to the vehicle, which are determined from phase measurements, to obtain an estimated inter-satellite angular deviation. The space errors are estimated on the basis of said theoretical and estimated inter-satellite angular deviations. Also, a method and system for estimating the attitude of a vehicle, in particular a spacecraft.

A method for calibrating spatial errors induced by phase biases having a detrimental effect on the measurements of phase differences of radio signals received by three unaligned receiving antennas of a vehicle. An inter-satellite angular deviation of a pair of satellites is estimated in two different ways: on the basis of the respective positions of the vehicle and of the satellites to obtain a theoretical inter-satellite angular deviation; and on the basis of the respective directions of incidence of the satellites relative to the vehicle, which are determined from phase measurements, to obtain an estimated inter-satellite angular deviation. The space errors are estimated on the basis of said theoretical and estimated inter-satellite angular deviations. Also, a method and system for estimating the attitude of a vehicle, in particular a spacecraft.

The present disclosure provides an image resolution adjustment system and a method thereof. The system comprises a transmitter and an image display device. The image display device presets a first resolution display screen. A wireless link is established between the image display device and the transmitter. The transmitter transmits a wireless signal. The image display device obtains the wireless signal from the transmitter. The image display device performs a position algorithm according to the wireless signal to calculate a relative position and perform the image adjustment for the first resolution display screen according to the relative position to generate a second resolution display image. So, the screen resolution of the image display device is adjusted according to the relative position such that users can have better visual effect and convenience.

The present disclosure provides an image resolution adjustment system and a method thereof. The system comprises a transmitter and an image display device. The image display device presets a first resolution display screen. A wireless link is established between the image display device and the transmitter. The transmitter transmits a wireless signal. The image display device obtains the wireless signal from the transmitter. The image display device performs a position algorithm according to the wireless signal to calculate a relative position and perform the image adjustment for the first resolution display screen according to the relative position to generate a second resolution display image. So, the screen resolution of the image display device is adjusted according to the relative position such that users can have better visual effect and convenience.

An antenna includes antenna structure configured to receive electromagnetic radiation and including an antenna geometry. The antenna geometry is configured to cause a variable phase shift in the electromagnetic radiation based on an angular position of a direction of propagation of the electromagnetic radiation relative to azimuth. An angle-of-arrival sensor includes the antenna configured to the receive electromagnetic radiation and to produce a phase-shift signal. A method for determining an angle of arrival of electromagnetic radiation uses the angle-of-arrival sensor.

An electronic device may include: a communication module that supports ultra-wideband communication; a memory that stores correction values respectively corresponding to a plurality of data ranges divided according to a specified condition, in relation to data for positioning of an external electronic device; a processor operatively connected to the communication module and the memory; and a location determination module operatively connected to the processor. The location determination module may be configured to: acquire a phase difference of arrival of a signal calculated on the basis of the signal received from the external electronic device via the communication module; determine a data range corresponding to the acquired phase difference of arrival of the signal from among the plurality of data ranges; and calculate the angle of arrival of the signal by using a correction value corresponding to the determined data range from among the correction values. Various other embodiments are possible.