Class / Patent application number | Description | Number of patent applications / Date published |
455670120 | Using a chamber (e.g., room testing or audio surveillance, etc.) | 26 |
20080214117 | METHOD FOR CONDUCTING RADIATED PERFORMANCE TESTS OF A WIRELESS DEVICE - A test apparatus for conducting a radiated performance test on a wireless device under controlled test conditions, the test apparatus having an anechoic chamber; a test computer; and an interface, the interface adapted to connect the test computer to the wireless device, the test apparatus being adapted to: establish a data connection on the interface between the test computer and the wireless device; initialize and start a timer for a predetermined interval on the wireless device; subject the wireless device to the radiated performance test in the anechoic chamber after the predetermined interval; and analyze test results on the test computer from a test log stored on the wireless device during the radiated performance test, wherein the interface between the test computer and the wireless device is adapted to be removed during the predetermined interval; for conducting a radiated performance test on a wireless device | 09-04-2008 |
20100216409 | SYSTEMS AND METHODS FOR OVER-THE-AIR TESTING OF WIRELESS SYSTEMS - Embodiments include systems and methods for over-the-air testing of wireless systems. Embodiments comprise separated anechoic chambers containing wireless devices. The anechoic chambers are connected by propagation path corridors. | 08-26-2010 |
20100285753 | SYSTEMS AND METHODS FOR SIMULATING A MULTIPATH RADIO FREQUENCY ENVIRONMENT - Embodiments include systems and methods for simulating a multipath environment for testing a device. In one embodiment, a plurality of antennas are placed around a device under test in an anechoic chamber. Each of a plurality of the antennas is connected to a path of a variable path simulator capable of generating multiple paths between the antennas and external wireless communication test equipment. The variable path simulator introduces a delay spread into each path. In this way, a multipath environment is simulated with signals appearing to arrive from different angles and different distances. Each of a plurality of antennas may be adapted to produce substantially plane waves at the device under test. | 11-11-2010 |
20110275329 | SYSTEMS AND METHODS FOR OVER-THE-AIR TESTING OF WIRELESS SYSTEMS - Embodiments include systems and methods for over-the-air testing of wireless systems. Embodiments comprise separated chambers containing wireless devices. The chambers are connected by propagation path corridors. | 11-10-2011 |
20110300809 | METHOD OF VERIFICATION FOR A WIRELESS SYSTEM - A system and method for communicating information from a device under test (DUT) to a computer or person outside of a shielded testing chamber. The DUT can be, for example, a cellular device, that is being verified for cellular transmission or regulatory compliance. In addition to the cellular transmissions, the DUT can communicate information outside the shielded testing chamber via additional electromagnetic signals that are not sent via a cable, thereby obviating the need for a cable inside of the shielded testing chamber. The absence of a cable minimizes interference in the chamber because a cable can act as an antenna and interfere with the cellular transmissions being transmitted. | 12-08-2011 |
20120071107 | Over-The-Air Test - A simulated radio channel is shifted with respect to a plurality of antenna elements coupled with an emulator for communicating with a device under test by using different directions for the simulated radio channel in an anechoic chamber. | 03-22-2012 |
20120100813 | SYSTEM FOR TESTING MULTI-ANTENNA DEVICES USING BIDIRECTIONAL FADED CHANNELS - A test system for testing multiple-input and multiple-output (MIMO) systems is provided. The test system may convey radio-frequency (RF) signals bidirectionally between a device under test (DUT) and at least one base station. The DUT may be placed within a test chamber during testing. An antenna mounting structure may surround the DUT. Multiple antennas may be mounted on the antenna mounting structure to transmit and receive RF signals to and from the DUT. A first group of dual-polarized antennas may be coupled to the base station through downlink circuitry. A second group of dual-polarized antennas may be coupled to the base station through uplink circuitry. The uplink and downlink circuitry may each include a splitter/combiner, channel emulators, amplifier circuits, and switch circuitry. The channel emulators and amplifier circuits may be configured to provide desired path loss, spatial interference, and channel characteristics to model real-world wireless network transmission. | 04-26-2012 |
20120231744 | SIMULTANEOUS DOWNLINK SENSITIVITY TESTING FOR MULTIPLE MODULATION SCHEMES IN A WIRELESS TEST SYSTEM - A test station may include a test host, a tester, and a test chamber. Multiple devices under test (DUTs) may be placed in the test chamber during device characterization operations. Radio-frequency signals may be conveyed from the tester to the multiple DUTs using a radiated arrangement through an antenna in the test chamber. The tester may broadcast downlink test signals in parallel to the multiple DUTs. The DUTs may simultaneously synchronize with the downlink test signals and measure radio-frequency performance levels while receiving the downlink test signals. The test host may direct the tester to gradually lower its output power level. The DUTs may be used to determine downlink sensitivity by monitoring the measured radio-frequency performance levels as the output power level of the tester is lowered. Simultaneously downlink sensitivity testing may be performed for multiple modulation schemes and data rates for any communications protocol. | 09-13-2012 |
20120231745 | SIMULTANEOUS SENSITIVITY TESTING FOR MULTIPLE DEVICES IN RADIO-FREQUENCY TEST SYSTEMS - A test station may include a test host, a signal generator, and a test chamber. Multiple devices under test (DUTs) may be placed in the test chamber during device characterization operations. Radio-frequency signals may be conveyed from the signal generator to the multiple DUTs using a radiated arrangement through an antenna in the test chamber. The signal generator may broadcast downlink test signals. The DUTs may synchronize with the downlink test signals and measure radio-frequency performance levels while receiving the downlink test signals. The test host may direct the signal generator to gradually lower its output power level. The DUTs may be used to determine downlink sensitivity by monitoring the measured radio-frequency performance levels as the output power level of the signal generator is lowered. Downlink sensitivity testing may be performed across any desired radio-frequency bands and channels. | 09-13-2012 |
20120282863 | ANTENNA TESTING SYSTEM AND ANTENNA TESTING METHOD - This disclosure claims antenna testing system, including a signal transmission simulator, a channel emulator and an anechoic chamber; more than two antennae are set in the anechoic chamber; each antenna is connected with the signal transmission simulator through the channel emulator; the more than two antennae are located on the sphere which center is the position of the device under test. This disclosure claims an antenna testing method, comprising: more than one channel model for test is set in the signal transmission simulator; a channel model is selected from the more than one channel model; wireless signals are transmitted according to the selected channel model; after emulation processed by channel emulator, emulated wireless signals are transmitted through the antennae in anechoic chamber; DUT set in the anechoic chamber receives and then processes the signals transmitted from each antenna, and outputs the processing results. | 11-08-2012 |
20130059545 | Over-The-Air Test - An emulating system of an over-the-air test comprises a radio channel emulator, a selector, a connector and a plurality of antenna elements placed around a test spot for an electronic device under test. The selector receives data on a simulated radio channel from the radio channel emulator and selects a subset of a plurality of positions of antenna elements on the basis of the data. The connector connects only the antenna elements in the subset and the radio channel emulator for physically realizing the simulated radio channel. | 03-07-2013 |
20130225092 | Vehicle Wireless Device Detection and Shielding - The disclosure includes an apparatus comprising a diagnostic unit configured to communicate with a rules engine to determine whether a transmission detected in a vehicle is classified as driver wireless device usage based on passenger data indicating whether a passenger is present in the vehicle. The disclosure also includes a system comprising a shielding unit configured to transmit a noise signal to interrupt a transmission detected in a vehicle, and a diagnostic unit configured to communicate with a rules engine to determine whether the detected transmission is classified as driver wireless device usage based on the passenger data indicating whether a passenger is present in the vehicle, and engage the shielding unit if the transmission is classified as driver wireless device usage. | 08-29-2013 |
20130281027 | Assessing Aircraft Interference Path Loss Employing Discrete Frequency Stirring - A method for accessing aircraft interference path loss in an aircraft. A plurality of radio frequency signals that are stepped through a plurality of frequencies in a frequency range is transmitted from a plurality of locations within an interior of the aircraft. Radio frequency signals present at a receive antenna are received in response to transmitting the plurality of radio frequency signals to form a plurality of measurements. An average of averages curve is generated from the plurality of measurements. A peak to average ratio is identified. Field uniformity is identified. A standard error for the average of averages curve is determined. An upper bound for the aircraft interference path loss in the aircraft is predicted using the average of averages curve, the peak to average ration, the field uniformity, and the standard error. | 10-24-2013 |
20130295856 | Testing Voice-Based Office Equipment For Immunity To Interference From Wireless Devices - According to some embodiments, a method includes placing a device under test (DUT) in a test chamber and applying a pulse-modulated RF wireless test signal to the DUT in the test chamber. The method further includes detecting an acoustic output of the DUT. In addition or as an alternative to applying the pulse-modulated test signal, the test signal strength may be at a level of 30 V/m or 90 V/m. If the DUT is a telephone, it may be coupled via a voice signal path to another telephone, and an output of the other telephone may also be detected. | 11-07-2013 |
20130295857 | OVER-THE-AIR TEST - A preselector forms a plurality of preselections, by generating, for each preselection, a predetermined number of random locations, each location being for an antenna element of the predetermined number of antenna elements around a device under test in an over-the-air test. A selector selects, for at least one path of a radio channel to be simulated, a preselection from among the plurality of preselections for which an absolute error between a theoretical and real spatial correlation is below a predetermined threshold. A connector connects the antenna elements at the locations of the selected preselection and the radio channel emulator together for physically realizing the simulated radio channel for the device under test and the radio channel emulator. | 11-07-2013 |
20130303089 | Uplink and/or Downlink Testing of Wireless Devices in a Reverberation Chamber - A system and method for wireless device testing. The system includes a reverberation chamber (RC) and a downlink channel emulator. A wireless device is placed within the RC. Probe antennas are positioned within the RC. The downlink (DL) channel emulator couples to the probe antennas. The DL channel emulator is configured to: (a) receive downlink stimulus signals; and (b) generate downlink intermediate signals based on the downlink stimulus signals in order to emulate desired downlink channel characteristics. The probe antennas are configured to respectively transmit the downlink intermediate signals into the RC for reception by the wireless device. The system may also include an uplink channel emulator, which receives uplink transmit signals from the RC, and generates uplink terminal signals based on the uplink transmit signals in order to emulate desired uplink channel characteristics. The uplink transmit signals may be used to evaluated the performance of the wireless device. | 11-14-2013 |
20130324051 | INFORMATION IDENTIFICATION SYSTEM, INFORMATION IDENTIFICATION DEVICE, AND INFORMATION IDENTIFICATION METHOD - An information identification system includes at least one mobile terminal and an information identification device. The mobile terminal includes: a detection unit configured to detect that the host terminal has been carried into a vehicle cabin; a first notification unit configured to, if the detection unit detects that the host terminal has been carried into the cabin, transmit a first notification signal providing notification that the host terminal has been carried into the cabin; and a second notification unit configured to, if the first notification signal transmitted from another mobile terminal is detected, transmit a second notification signal providing notification that the host terminal has been already present in the cabin. The information identification device includes an identification unit configured to, if the second notification signal is detected, identify the mobile terminal having transmitted the second notification signal as the driver's mobile terminal. | 12-05-2013 |
20140080423 | SIGNAL TESTING SYSTEM OF A HANDHELD DEVICE AND A SIGNAL TESTING METHOD THEREOF - A signal testing system of a handheld device is described in the present invention. The signal testing system comprises a testing apparatus and a computer device. The testing apparatus is connected with the handheld device. The computer device is connected with the handheld device and the testing apparatus, and is configured to control the handheld device accessing a signal testing state and receives a power value corresponding to the signal testing state through the testing apparatus. | 03-20-2014 |
20140134957 | SYSTEMS AND METHODS FOR OVER-THE- AIR TESTING OF WIRELESS SYSTEMS - Embodiments include systems and methods for over-the-air testing of wireless systems. Embodiments comprise separated chambers configured to contain devices to be tested. The chambers are connected by separately bounded propagation path corridors. | 05-15-2014 |
20140141726 | Robotic Wireless Test System - A test system may include a wireless test chamber with metal walls lined with pyramidal absorbers. A trapdoor may be provided in a wall opening to accommodate a robotic arm. The robotic arm may have grippers that grip a device under test or a support structure that is supporting a device under test. The robotic arm may move the device under test to a docking station for automatic battery charging during testing. When it is desired to perform wireless tests on a device under test, the robotic arm may move the device under test through the trapdoor into an interior portion of the test chamber. A turntable and movable test antenna may be used to rotate the device under test while varying angular orientations between test antenna and device under test. Emitted radiation levels can be measured using a liquid filled phantom and test probe on a robotic arm. | 05-22-2014 |
20140141727 | METHOD AND APPARATUS FOR MEASURING THE PERFORMANCE OF ANTENNAS, MOBILE PHONES AND OTHER WIRELESS TERMINALS - An apparatus including a chamber that defines an internal cavity therein, adapted to enclose the device under test, and including walls of an inwardly reflective material, rendering the walls reflective to electromagnetic waves, thereby simulating a multi-path environment. Thus, the chamber is a reverberation chamber. At least one moveable object and chamber antenna are arranged in the cavity. A measuring instrument is connected to the device under test and the chamber antenna, for measuring the transmission between them. Further, an improved antenna holder is disclosed, comprising three surfaces of a reflective material, said surfaces extending in planes which are orthogonal in relation to each other and each surface facing away from the other surfaces, and wherein a chamber antenna is arranged on each of said at least three surfaces. Other improvements relate to video surveillance, channel emulation and shielding. | 05-22-2014 |
20140187172 | TEST STATION FOR TESTING WIRELESS ELECTRONIC DEVICES - A system, method, and testing station for testing wireless network devices. The testing station includes a control system configured to control parallel testing of the wireless network devices. The testing station includes one or more computing devices in communication with the control system. The one or more computing devices are configured to perform testing of each of the wireless network devices in response to commands from the control system. The testing station includes a number of testing chambers configured to isolate the wireless network devices from outside radio frequency signals. | 07-03-2014 |
20140187173 | WIRELESS ENCLOSURE FOR TESTING ELECTRONIC DEVICES - A system, method, and enclosure for testing wireless devices. The enclosure includes a number of walls enclosing a testing space. The enclosure also includes a sliding cover secured between the two of the number of walls. The enclosure also includes one or more radio frequency layers disposed on the number of walls and the sliding cover. | 07-03-2014 |
20140256267 | WIRELESS TESTING SYSTEM AND METHOD FOR CONTROLLING THE SAME - A wireless testing system includes a main computer that controls a wireless module, a rotary mechanism, a measurement device, and an antenna. The rotary mechanism includes a rotatable seat controlled by the main computer to rotate about a first rotation axis, a support arm disposed on the rotatable seat, and a module rotating arm disposed on the support arm and positioning the wireless module at or in the vicinity of the first rotation axis. The module rotating arm is controlled by the main computer to rotate the wireless module about a second rotation axis. The antenna is substantially directed toward the wireless module. The measurement device is controlled by the main computer to control the antenna to receive or transmit a wireless signal. | 09-11-2014 |
20140273873 | SYSTEM AND METHOD FOR TESTING RADIO FREQUENCY WIRELESS SIGNAL TRANSCEIVERS USING WIRELESS TEST SIGNALS - A system and method for facilitating wireless testing of a radio frequency (RF) signal transceiver device under test (DUT). Using multiple antennas within a shielded enclosure containing the DUT, multiple wireless RF test signals resulting from a RF test signal radiated from the DUT can be captured and have their respective signal phases controlled in accordance with one or more signal characteristics, including their respective signal power levels, their respective signal phases as received, and a signal power level of a combination of the received signals. Such phase control of the captured wireless RF test signals can be performed individually for any DUT tested within the shielded enclosure, thereby providing compensation for the multipath signal environment within the shielded enclosure irrespective of the placement of the DUT, and thereby simulating a wired test signal path during wireless testing of the DUT. | 09-18-2014 |
20150099473 | METHOD AND APPARATUS FOR WIRELESS DEVICE PERFORMANCE TESTING - A method and apparatus for obtaining a set of optimized angles of arrival for a corresponding set of radio links. The set of radio links model a radio environment of a wireless unit operating at a particular location within in a radio system. Each radio link represents a different propagation path between the wireless unit and transmitting antenna operating within the radio system. Each optimized angle of arrival represents an angle of arrival of one radio link with reference to the wireless unit. Each probe antenna of a set of probe antennas is positioned at a corresponding angle of the set of optimized angles of arrival. A corresponding set of probe radio signals is transmitted from the set of probe antennas. | 04-09-2015 |