Abstract: The present invention provides a positioning method for long-thin fleet, which moves along a direction and has a motion track and a leading member. The leading member is in forefront of the motion track. The positioning method comprises the following steps: a positioning step and a transmitting step. The positioning step gets a positioning data through a GPS in a preset time. The transmitting step transmits a periodic signal to the members of the fleet through a wireless network system. The leading member proceeds the positioning and transmitting steps. The motion track is connected according to the positioning data.

Abstract: A GNSS receiver includes at least one buffer and at least one correlator block. The at least one buffer stores a plurality of samples corresponding to a received signal. The at least one correlator block includes a Doppler derotation block configured to perform Doppler derotation corresponding to at least one Doppler frequency on the plurality of samples, a register array configured to be loaded with the plurality of samples on Doppler derotation corresponding to a Doppler frequency of the at least one Doppler frequency, and a correlator engine configured to generate correlation results by correlating the plurality of samples in the register array with a plurality of code phases for at least one GNSS satellite. A presence of at least one GNSS satellite signal may be detected based on coherent accumulation and a non-coherent accumulation of the correlation results.

Abstract: The present invention relates to a method for determining the direction to a target by a direction finder, which comprises: predefining a direction axis as a 0° direction; first and second pair of antennas arranged such that a first line connecting between the first pair of antennae defines a 0°-180° axis parallel to said direction axis, and a second line connecting said second pair of antennas defines a 90°-270° axis perpendicular to said direction axis; generating a 0° antenna pattern and establishing a wireless communication between the direction finder and said target; attenuating the wireless communication signal until lost and recording the attenuation value; generating a 180° antenna pattern using said first pair of antennas, and establishing a wireless communication between the direction finder and said target; attenuating the wireless communication signal until lost, and recording the attenuation value and concluding a true direction to the target.

Abstract: A method is provided for using an antenna array to create two beams (a first beam and a second beam). In one aspect, the method uses dual polarization beam forming, which allows for many degrees of freedom in designing a desired power pattern. The method is well suited for systems with multiple radio chains (e.g., systems with active antennas). The method is also well suited for multi-port systems such as TD-SCDMA. In some embodiments, the method produces two beams where (a) the shape of the power beam pattern for the first beam and the shape of the power beam pattern for the second beam are the same (or substantially the same) in a plurality of directions of interest and (b) the beams have orthogonal (or substantially orthogonal) polarizations in the coverage area.

Abstract: A beam-forming antenna for transmission and/or reception of an electromagnetic signal having a given wavelength in a surrounding medium includes a transmission line electromagnetically coupled to an array of individually controllable antenna elements, each of which is oscillated by the signal with a controllable amplitude. The oscillation amplitude of each of the individual antenna elements is controlled by a switch. The antenna elements are arranged in various shapes such as a parabolic arc, a circular arc, a cylindrical surface or a conic surface. The antenna elements have various spacing such as uniform, parabolic, circular, or raised cosine.

Abstract: Assisted-GPS for a portable biometric monitoring device is provided. The portable biometric monitoring device may obtain updated ephemeris data from an associated secondary device via a short-range, low-power communication protocol. The secondary device may be a computing device such as a smartphone, tablet, or laptop. Various rules may control when the ephemeris data is updated. The ephemeris data may be used in the calculation of the global position of the portable biometric monitoring device. Additionally, the portable biometric monitoring device may communicate downloaded position fixing data to the associated secondary device. The associated secondary device may then calculate the global position from the position fixing data.

Abstract: A method for localizing a node in a wireless network, the method including: receiving location signals transmitted by beacons, the location signals including information about the locations of the respective beacons; detecting the respective received signal strengths of the received location signals; obtaining information about the different signal levels at which the beacons can transmit; studying the received location signals; determining the signal levels used by each of the beacons for the transmission of the location signals, based on the studying of the received signals; calculating a distance to each of the beacons based on the detected signal strengths and the determined signal levels; and localizing the node by means of the received location information and the calculated distances. The invention also relates to a node ant to a wireless network.

Abstract: A parasitic array antenna and a beamforming method for such a parasitic array antenna are disclosed. The parasitic array antenna may include a single driven element at the center of a ground plane. The driven element may be surrounded by multiple parasitic elements. RF loading may be selectively applied to each parasitic element. When symmetric loading is applied to the parasitic elements, the parasitic array antenna may function as an omnidirectional antenna. When asymmetric loading is applied to the parasitic elements, a null and a directional beam may be formed for the parasitic array antenna, therefore providing beamforming capabilities to the parasitic array antenna.

Abstract: Methods and systems are disclosed for performing energy-on-target simulations for targeted regions to predict power or energy levels incident within the targeted region resulting from transmissions of a specific transmitting platform. Models may be used of a transmitting platform, a receiving platform, and a channel between the transmitting platform and the receiving platform to perform the simulation. In some embodiments, a plot may be generated of the energy-on-target results.

Abstract: A system of geographical location of at least one radio signal transmitter located on the Earth's surface including: a set of satellites equipped with receiving antennas adapted for receiving said signals, forming a main extended interferometry device; an intersatellite relative metrology device for determining the relative positions of said satellites to one another, including at least one dedicated sensor for each satellite, and intersatellite communication means; a device for dating said received signals from said determining of the relative positions of said satellites to one another, issued by said intersatellite relative metrology device; a secondary interferometry device including at least one set of at least three antennas of a satellite; a ground base station; a device for transmitting measurements acquired on the satellites to the ground base station; and means of determining an absolute position of at least one of the satellites.

Abstract: A GNSS receiver includes: a first correlation peak detecting unit (1102) that detects a peak of a correlation value between a positioning signal and a C/A code replica signal; a second correlation peak detecting unit (1104) that detects a peak of the correlation value through a multipath error reduction technique; a signal intensity detecting unit (110, 112) that detects a signal intensity of the positioning signal; a switching unit (108) that inputs the positioning signal to the second correlation peak detecting unit (1104) when the signal intensity is higher than or equal to a threshold, and inputs the positioning signal to the first correlation peak detecting unit (1102) when the signal intensity is lower than the threshold; a pseudo-range calculation unit (114) that calculates a pseudo-range based on the detected correlation peak; and a positioning calculation unit (116) that calculates a location of the GNSS receiver based on the pseudo-range.

Abstract: The invention, in some embodiments, relates to the field of global navigation satellite systems, and more particularly to the field of methods and devices for identifying whether a satellite in a global navigation satellite system has a line of sight to a specific global navigation satellite system receiver (LOS satellite) or does not have a line of sight to the global navigation satellite system receiver (NLOS satellite).

Abstract: A light-weight, air-cooled transmit/receive unit is provided, including a first external cover member, an opposed second external cover member, and a central housing unit, including thermal management means, interposed between the first and second external cover members. A transmit/receive circuit board, including components and an integrated and common radiating element for at least one channel, is interposed between a first surface of the central housing unit and the first external cover member, and a controller circuit board and a power converter circuit board are interposed between an opposed second surface of the central housing unit and the second external cover member.

Abstract: A satellite radiowave receiving device includes: a receiving unit which receives a radiowave signal; a conversion unit which converts the radiowave signal into digital data; a detection/arithmetic operation unit which detects the satellite signal; a capturing unit which searches a reception frequency; a setting unit which sets a second bit number, and the number of parallel processing in which the predetermined arithmetic operation can be executed in parallel; and a specifying unit which specifies the reception frequency of the satellite signal, and the detection/arithmetic operation unit executes the predetermined arithmetic operation in parallel for the input signal data related to reception frequencies of which number is equal to or less than a predetermined number of maximum parallel processing, and the number of parallel processing is determined so that a total bit number is equal to or less than the maximum bit number/the number of maximum processing.

Abstract: A system includes a memory with columns and rows. A sampler samples a first portion of a signal during first periods to obtain sets of samples, respectively. The sets of samples include a first set having first samples and a second set having second samples. A first controller writes each set in the sets of samples in a respective one of the columns. The first controller writes: the first samples in a first column such that each of the first samples is stored in a respective one of the rows; the second samples in a second column such that each of the second samples is stored in a respective one of the rows; and the second samples in the second column subsequent to writing the first samples in the first column. A second controller reads third samples stored in a first row and fourth samples stored in a second row.

Abstract: A pseudo range is corrected with high accuracy using a pseudo range correction method that incorporates carrier smoothing. A code pseudo range correction unit (19) performs carrier smoothing of an L1 code pseudo range (PRL1(i)) by the temporal change (?ADRL1(i)) in an L1 carrier phase, and performs carrier correction of a code ionosphere delay (IPRL1(i)) by the temporal change (?IADRL1(i)) in a carrier ionosphere delay. The code pseudo range correction unit (19) performs ionosphere delay correction by subtracting the corrected ionosphere delay (I?L1sm(i)) from the L1 code pseudo range (PRL1sm(i)) after smoothing processing. At this time, a direction of the delay in the temporal change (?IADRL1(i)) in the carrier ionosphere delay included in the temporal change (?ADRL1(i)) in the L1 carrier phase is matched with a direction of the delay in the temporal change (?IADRL1(i)) in the carrier ionosphere delay used to calculate the corrected ionosphere delay (I?L1sm(i)).

Abstract: Embodiments describe determining position by selecting a set of digital pseudorandom sequences. The magnitudes of the cross-correlation between any two sequences of the chosen set are below a specified threshold. A subset of digital pseudorandom sequences are selected from the set such that the magnitudes of the autocorrelation function of each member of the subset, within a specified region adjacent to the peak of the autocorrelation function, are equal to or less than a prescribed value. Each transmitter transmits a positioning signal, and at least a portion of the positioning signal is modulated with at least one member of the subset. At least two transmitters of the plurality of transmitters modulate respective positioning signals with different members of the subset of digital pseudorandom sequences.

Abstract: A mobile communication device includes a global navigation satellite system (GNSS) receiver for receiving GNSS signals, a radio frequency (RF) receiver for receiving RF signals and a voltage controlled oscillator supplying an oscillator signal to the GNSS receiver and the RF receiver. The GNSS receiver and the RF receiver use the oscillator signal to receive the GNSS signals and the RF signals. The mobile communication device also includes a processor for initializing and/or adjusting a model of a frequency behavior of the voltage controlled oscillator, and uses the model to track the GNSS signals when computing a location of the mobile communication device.

Abstract: Provided is a GPS receiver, including: a navigation signal receiving unit receiving navigation signals from satellites; a navigation signal processing unit acquiring position information of each satellite from the received navigation signal and measuring a pseudo-range; a pseudo-range estimating unit determining whether a satellite of which the pseudo-range may be estimated exists among the satellites from which the navigation signals are transmitted in the case where the number of satellites from which the navigation signals are transmitted is 3 or less and estimating the pseudo-range of the determined satellite; and a navigation solution calculating unit calculating a navigation solution by using the measured pseudo-range and the estimated pseudo-range.

Abstract: A directional antenna system for portable communication device that provides user control on the transmit antennas. The directional antenna system is made by two or more directional antennas with the directional antennas arranged in the pattern such that one of the directional antenna is pointing towards the user and the other directional antenna(s) are pointing away from the user. The directional antenna system is designed to cover a 360 degree circle in both the receiving and transmitting mode. In one of the transmitting mode, the portable communication device transmits RF signal on the directional antenna(s) that is pointing away from the user to minimize the electromagnetic energy exposure to the user. In the case when the RF receiving signal is below the desired operating condition on the outward pointing directional antenna(s), the portable communication device will generate an alert to the user.