Abstract: An automotive diagnostic tool includes an antenna, a speaker, and a controller. In response to a vehicle diagnostic request, the controller generates a carrier frequency that corresponds to a predetermined frequency associated with electromagnetic emissions from an imbalanced differential channel in the vehicle. The controller alternately enables and disables the differential channel resulting in an audio signature and a baseline audio signature. The controller demodulates signals from the antenna based on the carrier frequency and outputs the demodulated signal to the speaker for analysis by a listener. The demodulated signal may be further processed by the controller to identify emissions from the communication network.

Abstract: A system for monitoring a pantograph of a railway vehicle, the pantograph being adapted to be connected to a catenary and electrically connected to a traction unit, the catenary being adapted to provide an alternating current to the railway vehicle, the system further including: a voltage step detection device for detecting a voltage step of a pantograph voltage at the pantograph, a zero crossing detection device for detecting a zero crossing of a line current, the line current being a portion of a pantograph current provided to the traction unit, the pantograph current being the current flowing through the pantograph; and a bouncing detection portion adapted to determine at least one bouncing time of the pantograph based on one or more detected voltage steps of the voltage step detection device and/or one or more detected zero crossings of the zero crossing detection device.

Abstract: Techniques for configuring a test system that enable simple specification of a degree of concurrency in testing separate functional portions of a semiconductor device. For a test flow with multiple sub-flows, the pins accessed in connection with each sub-flow may define a flow domain. Site regions, each associated with a flow domain, may be defined. Tester sites may be associated with each of these flow domain specific site regions and independently operating resources may be assigned to these tester sites. A second portion of the defined site regions may be associated with tester sites, but resources assigned to these site regions may be accessed from multiple flow domains. Test blocks, even if not developed for concurrent execution, may be executed concurrently using resources in the flow domain specific site regions. Flexibility is provided to share resources through the use of the second portion of the site regions.

Abstract: A semiconductor abnormality detection circuit includes a semiconductor circuit and a controller which controls supply of power to a load. The semiconductor circuit includes a switch device disposed between a power source and the load, and a sense signal generator generating a sense signal corresponding to a current flowing through the switch device. The controller judges that the semiconductor circuit is operating normally if the instruction voltage level is equal to an off-voltage corresponding to non-energization of the switch device and a voltage of the sense signal is equivalent to a prescribed off-voltage corresponding to non-energization of the switch device or the instruction voltage level is equal to an on-voltage corresponding to energization of the switch device and a voltage of the sense signal is equivalent to a prescribed on-voltage corresponding to a steady energization state of the load.

Abstract: A test system for testing an integrated circuit package is provided. The test system may include a test board on which a package under test can be mounted, a test box for gathering desired measurements on the package under test, and a test host for automatically controlling the test box during testing. The test box may be coupled to row multiplexing circuitry and column multiplexing circuitry for selectively addressing one or more daisy-chained nets in the package under test. The test box may also be coupled to a source measurement unit (SMU) component that provides current source signals to the package under test and to a digital multimeter (DMM) component that provides voltage sense signals to the package under test. Arranged in this way, the test system can be configured to perform automated I-V curve tracing, resistance measurements, open/short circuit detection, and monitoring of other package-level manufacturing defects.

Abstract: A method and system for performing electrical tests on complex devices. The method comprises: a first stage that includes generating a model of the device in a digital electronic circuits description language based on stimuli transfer, preparing a stimulus vector and simulating the model with the stimulus vector for obtaining the continuity and insulation test program to be performed to the device; a second stage where the device is connected to a workbench formed by an electrical testing machine and a matrix switch via a connection interface; and a third stage where the test program on the device is executed. The system comprises the workbench and a computer system with software adapted to execute the method.

Abstract: An electricity meter for metering an amount of energy in accordance with a primary AC current and an AC supply voltage. The electricity meter comprises a current transformer comprising the primary conductor, a secondary winding, an auxiliary winding, and a magnetic core arranged to be magnetically coupled with the three windings. The electricity meter further comprises a circuit configured to provide the auxiliary winding with a test signal modulated in accordance with at least one of a first and a second modulation state. The test signal has the same frequency as the AC supply voltage.

Abstract: A method for automatically measuring physical characteristics of a cable, comprises at least the following steps: positioning on said cable of means for creating an artificial singularity; the injection, at a point of said cable, of an electrical test signal; acquisition of said signal reflected on the singularities that said cable includes so as to produce a first reflectogram; measurement, on said reflectogram, of the temporal position ?t of the peak of the signal derived from its reflection on said artificial singularity; determination of the propagation velocity vp=2x/?t of the signal in said cable from the temporal position ?t and from the position x of said means for creating an artificial singularity on the cable.

Abstract: A partial discharge signal processing device of the present invention is provided with: a partial discharge signal receiving unit disposed inside a high voltage electric machine device; a partial discharge signal processing unit; and a coaxial cable connecting the partial discharge signal receiving unit and the partial discharge signal processing unit. In addition, the partial discharge signal receiving unit comprises an electromagnetic wave receiving unit that receives electromagnetic waves generated by partial discharge. Further, the partial discharge signal processing unit comprises: a detection unit that detects a partial discharge signal transmitted through the coaxial cable; a band limiting unit that limits the frequency bandwidth of the partial discharge signal; an attenuation amount correction unit that corrects an attenuated partial discharge signal; and a signal output unit that outputs, to an external device, the corrected partial discharge signal.

Abstract: A semiconductor test structure is provided for detecting raised source/drain regions-gate electrode shorts, including a semiconductor substrate, FETs formed on the semiconductor substrate, raised source/drain regions of the FETs formed on the semiconductor substrate, a gate electrode structure comprising multiple gate electrodes of the FETs arranged in parallel to each other, and a first electrical terminal electrically connected to the gate electrode structure, and wherein no electrical contacts to the raised source/drain regions are present between the multiple gate electrodes of the gate electrode structure.

Abstract: Embodiments of the present invention provide methods for destructive testing of a printed circuit board assembly (PCBA). The PCBA contains embedded components on a printed circuit board within a non-functional area. At least one of these embedded components is susceptible to defects and exposed to conditions that facilitate destructive testing which leads to accelerated measurements. The accelerated measurements on the non-functional area are more representative of variability than measurements on a functional module while providing insights into potential future defects.

Abstract: Systems and methods for semiconductor design evaluation. IC layout information of a circuit design is received, and the circuit design is decomposed into smaller circuit pieces. Each circuit piece has IC layout information and a netlist. For each circuit piece, a set of strike models is selected based on the layout information and the net-list of the circuit piece and received radiation environment information. Each strike model has circuit components with voltage values corresponding to a respective particle strike. For each selected strike model of a circuit piece: a radiation susceptibility metric is determined by comparing functional results of simulation of the of the strike model with functional results of simulation of the circuit piece. For each circuit piece, a radiation susceptibility metric is determined based on the radiation susceptibility metrics generated for each selected strike model of the circuit piece.

Abstract: A system comprises a plurality of components, scan chain selection logic coupled to the components, and override selection logic coupled to the scan chain selection logic. The scan chain selection logic selects various of the components to be members of a scan chain under the direction of a host computer. The override selection logic detects a change in the scan chain and, as a result, blocks the entire scan chain from progressing.

Abstract: A first clock signal and second clock signal are generated by first and second clock circuits, respectively. A multiplexer selects between the first clock signal and second clock signal to produce a scan clock signal. A non-scan flip flop clocks a data input through to a data output in response to the second clock signal. A scan chain includes a scan flip flop configured to capture the data output from the non-scan flip flop in response to the scan clock signal. The logic state of the captured data in the scan flip flop of the scan chain is indicative of whether the second clock circuit has a stuck-at fault condition (for example, with respect to any one or more included buffer circuits).

Abstract: Various aspects of this disclosure describe measuring timing slack using an endpoint criticality sensor on a chip. A sensor circuit is attached to sensitive endpoints on the chip (e.g., logical gates in a timing critical path) so that the sensor circuit receives the endpoint's data signal and clock signal. The sensor circuit introduces skew between the data signal and the clock signal by delaying the data signal more than the clock signal, and compares skewed data signals to determine if an error occurs because of the induced skew. By delaying the data signal with different delay amounts and monitoring what delays cause errors, an amount of timing slack in the data signal and clock signal (e.g., margin to criticality) is measured during operation of the chip for relevant circuitry to the system implemented on the chip, compared to test circuitry operating while the chip is in a test mode.

Abstract: A chain of flip-flops is tested by passing a reference signal through the chain. The reference signal is generated from a test pattern that is cyclically fed back at the cadence of a clock signal. The reference signal propagates through the chain of flip-flops at the cadence of the clock signal to output a test signal. A comparison is carried out at the cadence of the clock signal of the test signal and the reference signal, where the reference signal is delayed by a delay time taking into account the number of flip-flops in the chain and the length of the test pattern. An output signal is produced, at the cadence of the clock signal, as a result of the comparison.

Abstract: An automatic transfer switch (ATS) detection system is configured to detect an ATS. The ATS detection system includes an AC source configured to transfer a power signal to the ATS, a power switch, and an electronic load. The power switch includes a first input terminal coupled to a first signal lamp, a second input terminal coupled to a second signal lamp, and an output terminal. The AC source is coupled to the ATS and the second input terminal of the power switch, and the ATS is coupled to the first input terminal of the power switch. The electronic load is coupled to the output terminal of the power switch. The power signal is transferred through the ATS and the power switch, and is received by the electronic load.

Abstract: A method for estimating a state of charge of a battery including plural cells connected in series, including: determination, at a given time, of a minimum cell voltage and of a maximum cell voltage from among the cell voltages, and calculation of a physical quantity analytically depending on the minimum and maximum cell voltages according to an equation including weighting elements ensuring the weight associated with the maximum cell voltage increases when the state of charge of the associated cell increases, and the weight associated with the minimum cell voltage increases when the state of charge of the associated cell decreases.

Abstract: System and methods for estimating a future power capability of a battery system included in a vehicle are presented. In some embodiments, a method for estimating a future power capability of a battery system may include determining an initial battery voltage when the battery operates at a current limit and estimating a future battery current at a first time when the battery operates at the associated voltage limit based on the initial battery current. A future battery voltage at the first time when the battery operates at the associated current limit may be determined based on the initial battery voltage. An estimated voltage-limited power capability of the battery at the first time may be determined based on the future battery current and an estimated current-limited power capability of the battery at the first time may be determined based on the future battery voltage.

Abstract: A battery system includes a battery that couples to an electrical system. The battery system also includes a battery control module that electrically couples to the battery. The battery control module performs a parallel current integration process on an initial state of charge using an actual capacity and a candidate capacity of the battery. Additionally, the battery control module performs a directional comparison between an estimated state of charge of the battery and results of the parallel current integration process. Further, the battery control module determines validity of the estimated state of charge based at least in part on the directional comparison between the estimated state of charge of the battery and the results of the parallel current integration process.

Abstract: A method of measuring current of a battery pack includes a rechargeable battery, a main switch connected in series to the battery, and a pre-charge switch connected in parallel to the main switch. The method includes: turning on the pre-charge switch and turning off the main switch; measuring a voltage between both terminals of the main switch; calculating a pre-charge current flowing through the pre-charge switch by taking into consideration the resistance of a pre-charge resistor connected in series to the pre-charge switch; measuring current of the battery pack using a current sensor; comparing the current measured using the current sensor with the pre-charge current; and correcting an offset of the current sensor based on results of the comparison.

Abstract: A power supply device includes: an assembled battery that is configured of N pieces of battery cells connected in series; (N+1) pieces of measurement lines that obtain analog signals corresponding to terminal potentials of the battery cells; a filter circuit that attenuates a specified frequency component of the inputted analog signals and outputs; and an analog/digital converter that converts the analog signals outputted from the filter circuit into digital signals. The filter circuit is configured of: (N+1) pieces of input terminals; (N+1) pieces of output terminals; (N+1) pieces of filter resistors; and (N+1) pieces of filter capacitors of which one ends respectively connected between the filter resistors and the output terminals and the other ends are connected to each other in common.

Abstract: There is provided a voltage detecting device. A plurality of detecting units are configured to detect voltages of a plurality of battery stacks of a battery pack having the plurality of battery stacks each having a plurality of battery cells connected, at intervals of a predetermined period, respectively. A mode switching unit is configured to perform switching between an active mode in which the detecting units detect the voltages and a standby mode in which the value of an electric current flowing in the detecting units is smaller than a predetermined value. A timing changing unit is configured to change start timings or/and finish timings of the active mode.

Abstract: A switching power supply burn in test circuit includes an AC/DC bidirectional converter, a DC/DC load and a first wire connecting end. The AC/DC bidirectional converter has an AC terminal connected to a power grid of the mains power, and a DC terminal connected to the first wire connecting end. The DC/DC load has an output terminal connected to the first wire connecting end. When the power supply to be tested is a DC/DC switching power supply, the input terminal of the DC/DC switching power supply is connected to the first wire connecting end, and its output terminal is connected to the input terminal of the DC/DC load. When the power supply to be tested is an AC/DC switching power supply, the input terminal of the AC/DC switching power supply is connected to the mains power and its output terminal is connected to the input terminal of the DC/DC load.

Abstract: An electronic device equipped with a magnetic sensor which detects a magnetic field around the electronic device, a connector connection section to connect to a magnetic connector including a magnet which is positioned on one end side of a connection cable, and a CPU, in which the CPU controls to stop a measuring operation in the magnetic sensor when judged that the connector connection section is connected to the magnetic connector.

Abstract: A sensor device includes a high voltage circuit, a sensor and a charge storage. The sensor utilizes a low voltage supply. The high voltage circuit includes a blocking device and a regulating device. The blocking device is configured to block negative voltages of the high voltage supply. The regulated device is configured to receive a high voltage supply and generate the low voltage supply from the high voltage supply. The high voltage supply is DC. The charge storage has a vertical capacitor and is configured to maintain the low voltage supply during a power break and to store and maintain charge during non-break periods.

Abstract: An angle sensor may comprise a first primary sensing element and a second primary sensing element. The first primary sensing element may be positioned adjacent to the second primary sensing element in a plane substantially parallel with respect to a face of a magnet. The angle sensor may comprise a first auxiliary sensing element and a second auxiliary sensing element. The first primary sensing element and the second primary sensing element may be positioned between the first auxiliary sensing element and the second auxiliary sensing element in the plane substantially parallel with respect to the face of the magnet.

Abstract: A reduced size/thickness magnetic detection device includes: a substrate; and a magneto-impedance element at one substrate surface side and including a magneto-sensitive wire and a detection coil. The wire senses an external magnetic field component in a first axis direction in which the wire extends. The coil loops around the wire, and includes left-side and right-side coil parts coexisting along the wire, and a magnetic field direction changing body of soft magnetic material having at least a part at another substrate surface side or in the substrate above an intermediate position between left-side and right-side coil parts. The body can change an external magnetic field component in a third axis direction intersecting the substrate to a measurement magnetic field component in the first axis direction. The external magnetic field component in the third axis direction can be detected from a left-side coil part output and a right-side coil part output.

Abstract: The present invention is directed to a system and method for performing tissue, preferably bone tissue manipulation. The system and method may include implanting markers on opposite sides of a bone, fractured bone or tissue to facilitate bone or tissue manipulation, preferably in-situ closed fracture reduction. The markers are preferably configured to be detected by one or more devices, such as, for example, a detection device so that the detection device can determine the relative relationship of the markers. The markers may also be capable of transmitting and receiving signals. An image may be captured of the bone or tissue and the attached markers. From the captured image, the orientation of each marker relative to the bone fragment may be determined. Next, the captured image may be manipulated in a virtual or simulated environment until a desired restored orientation has been achieved. The orientation of the markers in the desired restored orientation may then be determined.

Abstract: The embodiments relate to a local coil for an imaging magnetic resonance tomography system. The local coil includes at least one displacement facility for a displacement of at least part of the local coil along at least axes running, in particular, in the axial patient direction.

Abstract: In one embodiment, an MRI apparatus (20) includes “a temperature measuring unit (70A to 70D) performing temperature measurement of a gradient magnetic field coil unit (26)”, a data storing unit (100), a pulse setting unit (102), and an imaging unit. The data storing unit stores the first and second data indicating a shift of a center frequency of magnetic resonance of hydrogen atoms. The first data corresponds to a case of temperature rise of the gradient magnetic field coil unit, and the second data corresponds to a case of temperature fall of that. The pulse setting unit corrects a center frequency of an RF pulse by calculating an estimated shift of the center frequency based on data corresponding to result of the temperature measurement out of the first and second data. The imaging unit performs magnetic resonance imaging based on the corrected RF pulse.

Abstract: Example minimalist magnetic resonance imaging (MRI) radio frequency (RF) coils that are connected to off coil circuitry by capacitive coupling plates are described. A minimalist MRI RF coil may have some elements that form a traditional coil located off the coil in off coil circuitry. An MR procedure may involve a number of minimalist MRI RF coils that are moved through an excitation zone as a patient is moved through the excitation zone. Example minimalist MRI RF coils may be selectively connected to off coil circuitry while the coils are in the excitation zone. The coupling may be made by capacitive coupling plates. Unlike conventional systems, example systems have capacitive coupling plates with properties that facilitate maintaining a constant capacitance between a coupling plate associated with the coil and coupling plates associated with the off coil circuitry as the coupling plates move relative to each other.

Abstract: A test method for a reordering algorithm of a 3D spin echo magnetic resonance pulse sequence is provided, in which echo train positions are checked for at least two k-space elements. Further, a non-transitory computer readable medium and a magnetic resonance tomography system which comprises a test device for testing a reordering algorithm of a 3D spin echo magnetic resonance pulse sequence featuring a checking module for checking the echo train position for at least two k-space elements are provided.

Abstract: A specially shaped coil assembly for accurate adjustment of the magic angle is provided to permit accurate adjustment of an angle made between the direction of a static magnetic field and the axis of sample spinning without impairing the resolution of NMR signals. The sample is placed within the external static magnetic field B0. The coil assembly is for use in a solid-state NMR apparatus that performs NMR detection while spinning the sample about an axis tilted at the magic angle relative to the external static magnetic field B0. The coil assembly comprises a pair of arcuate conductor lines and a pair of straight conductor lines. Each of the arcuate lines has a diameter of 2a. Each of the straight lines has a length of 2L. The diameter 2a and the length 2L are so selected as to satisfy the relationship: 1.91?2L/2a?2.15.

Abstract: The invention provides a tri-axial nuclear magnetic resonance apparatus for testing of petro-physical properties and gathering of geo-mechanical information and methods of using the same. The tri-axial nuclear magnetic resonance apparatus includes a tri-axial load frame encasing a tri-axial load cell that includes a tri-axial sample holder, at least one electrical sensor, at least one acoustic sensor, and a nuclear magnetic resonance instrument.

Abstract: Image diagnosis apparatus (20) generates image data of an object by using external electric power, and includes a charge/discharge element and a charge/discharge control circuit. The charge/discharge element is charged with the external electric power and supplies part of the consumed power of the image diagnosis apparatus by discharging. The charge/discharge control circuit controls charge and discharge of the charge/discharge element in such a manner that the charge/discharge element discharges in a period during which the consumed power is larger than a predetermined power amount and the charge/discharge element is charged in a period during which the consumed power is smaller than the predetermined power amount.

Abstract: Systems and methods for efficiently generating MR images are provided. The method comprises acquiring k-space MR data, reconstructing an MR image from the k-space MR data, and generating the MR image. The MR image is reconstructed using an alternative-direction-method-of-multiplier (ADMM) strategy that decomposes an optimization problem into subproblems, and at least one of the subproblems is further decomposed into small problems. The further decomposition is based on Woodbury matrix identity and uses a diagonal preconditioner based on non-Toeplitz models.

Abstract: In a method and a magnetic resonance scanner for generating a data set, a first RF pulse is applied simultaneously with a first gradient having a first amplitude and a first polarity, and at least one second gradient is applied having a second amplitude and a second polarity. A second RF pulse is applied simultaneously with a third gradient having a third amplitude and a third polarity. The third amplitude is different from the first amplitude and/or the third polarity is different from the first polarity. The scan signal generated using the second RF pulse is then read out.

Abstract: A system and method for creating magnetic resonance images are provided. The system applies an RF irradiation during a saturation time period at a reference frequency that saturates a range of selected labile spin species of the subject. The system encodes frequency offsets by applying a gradient G1 at least during the saturation time period. The system applies a plurality of slice selection gradients accompanied by a train of RF pulses during a voxel selection time period and a gradient G3 during an acquisition time period. One or more spin/gradient echo signals having information pertaining to at least one of metabolites and metabolite byproducts is acquired to form a CEST medical imaging data set and the CEST medical imaging data set is reconstructed to form a CEST image of the subject including information about the at least one of metabolites and metabolite byproducts within the subject.

Abstract: When imaging is performed by executing a pulse sequence on an MRI apparatus, silencing is realized with securing sufficient application amount of crusher without extending the application time thereof. In the pulse sequence carried by the MRI apparatus, at least one gradient magnetic field pulse included in the pulse sequence has a waveform synthesized from two or more base waves shifting along the time axis direction (synthesized waveform), and the base waves have a smoothly changing waveform convex upward. The pulse of the synthesized waveform is generated from one or more trapezoidal or triangular base pulses by a waveform conversion part of a computer of the MRI apparatus or an external computer.

Abstract: An apparatus, a magnetic resonance imaging system, and a method of use are provided for a reception system for transmitting magnetic resonance signals from local coils to an image processing unit of a magnetic resonance imaging system. The apparatus includes an analog receiver for receiving and processing analog signals from the local coils that is configured to directly sample analog signals having different individual frequency bands and/or frequency band pairs, to distinguish the analog signals and to process them differently. The apparatus also includes an A/D converter for converting the processed analog signals from the local coils into digital signals. The apparatus further includes a digital signal processor for processing the digital signals, wherein the digital signal processor includes a Weaver unit and a downstream decimation filter unit.

Abstract: It is an object of the present invention to provide a technique for reducing the degradation of the image quality due to the phase difference between scanning trajectories (blades) in measurement using a non-orthogonal sampling method. Therefore, in the present invention, correction for reducing the phase difference between a plurality of scanning trajectories (blades) measured by using a non-orthogonal sampling method is performed at the time of image reconstruction. For example, the reduction of the phase difference is performed using a method of matching the phases at the intersections between blades, matching the phases of all blades at positions determined by considering the shift amount in the frequency direction, or canceling out the phase change amount of each blade obtained by calculation.

Abstract: In a method and magnetic resonance (MR) apparatus for producing an MR image of an examination object with an MR imaging sequence, at least one RF pulse is radiated by a whole body coil of the MR scanner of the MR apparatus during the imaging sequence, at least one RF pulse is radiated by a local transmit coil of the MR scanner during the imaging sequence, MR signals that are generated by the combined radiated RF pulses are read out, and an MR image is reconstructed from the read-out MR signals.

Abstract: Disclosed herein is an example method and system for characterizing a biological structure in terms of bio-markers derived from diffusion weighted magnetic resonance imaging (DWI) data of biologic material. A first set of DWI data may be obtained using a fixed diffusion encoding gradient and a plurality of diffusion time resolutions, and a second set of DWI data may be obtained using a fixed diffusion time resolution and a plurality of diffusion encoding gradients. The first and second sets may be analytically fit with a fractional power-law diffusion model parameterized by fractional exponents each uniquely corresponding to one of a plurality of bio-markers of the biologic material. Fractional exponents may be determined from the analytical fitting of the first and second sets of DWI data, and an image of the biologic material may be generated and displayed.

Abstract: In a magnetic resonance apparatus and a method for the operation thereof, a pulse sequence is employed that is composed of a number of pulse sequence segments, each including an excitation procedure and a readout procedure. For each of a number of slices of an examination subject that are to be simultaneously excited, the pulse sequence segment is repeated, as a pulse sequence segment pair, with a prephasing gradient pulse being generated between the respective excitations in the respective segments of the pair. The prephasing gradient is configured to cause a gradient moment for all gradients between the respective centers of the respective excitations to be zero. The respective rephasing gradient pulses in each pair of segments are similar, and the respective excitation pulses have different phases.

Abstract: The system of the invention utilizes a magnetic resonance imaging (MRI) coil to measure power at a different frequency than the MRI frequency to produce MRI images. The different frequency such as harmonic frequency of the MR coil is applied to the coil and the reflected power is measured by the power sensor. Changes due to respiratory, cardiac, or overall motion are then analyzed, as desired. During imaging, the coil is connected to the MRI system and disconnected from the setup described, including the power sensor and its associated data processing, amplifier, signal generator, and directional coupler. Disconnect is provided in a one-step process by the switching circuit.

Abstract: Apparatus and methods for calibrating tester channels of an automated test system. A relay matrix assembly including a plurality of microelectromechanical (MEM) switches may be used to connect a plurality of tester channels to an analyzer calibration instrument rapidly without requiring serial, robotic probing of the test channels. The relay matrix assembly may be constructed on a printed circuit board that can be attached to an interface on the tester. Calibration parameters for the test channels may be calculated from waveforms received through the relay matrix assembly and that have been corrected to remove waveform distortion introduced by the relay matrix assembly. Parameters to correct for distortion in the relay matrix assembly may be measured in advance and stored for use when calibration is to be performed.

Abstract: A method of direction finding (DF) positioning involving main lobe and grating lobe identification in a wireless communication network is proposed. A receiver performs DF algorithm on radio signals associated with multiple antennas over a first channel frequency and estimates a first set of DF solutions. The receiver performs DF algorithm on radio signals associated with multiple antennas over a second channel frequency and estimates a second set of DF solutions. The receiver then identifies the correct DF solution (e.g., the main lobe direction) by comparing the first set of DF solutions and the second set of DF solutions.

Abstract: In a general aspect, motion is detected based on statistical parameters of received wireless signals. In some aspects, signals are obtained. The signals are based on wireless signals transmitted through a space and received at a wireless communication device. Values of a set of statistical parameters are computed for each signal, and groupings of the statistical parameter values are identified. A motion detection process that uses the identified groupings is executed to determine whether an object moved in the space.

Abstract: A communication method in an ad hoc network, including a coordinating mobile communication device, referred to as the coordinator device, and a plurality of subordinate mobile communication devices, referred to as subordinate devices, each communication device including a wireless communication module and a positioning module using a transmission of first pulses modulated in accordance with a first ultra-wide band modulation in order to determine information representing a position of said communication device. The method includes, when it is implemented by a communication device: obtaining data to be transmitted; checking a transmission capability of the wireless communication module; when the wireless communication module does not allow to transmit the data, using the positioning module to transmit said data in the form of second pulses orthogonal to the first pulses.