Using A Test Signal Patents (Class 455/115.2)
  • Patent number: 10263837
    Abstract: The present invention provides an alarm method for a multi-mode base station. The method includes generating, by the multi-mode base station, alarm information in a first operation mode in a first multi-mode operation mode. The multi-mode base station determines that the alarm information is applicable to all operation modes in the first multi-mode operation mode. The multi-mode base station sends the alarm information as public alarm information of the first multi-mode operation mode to a network management system. The present invention further provides a multi-mode base station and a communication system. The present invention is capable of determining a scope of operation modes related to alarm information generated in the multi-mode base station, which is used to manage the alarm information.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: April 16, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Liya Mi
  • Patent number: 9941983
    Abstract: A test apparatus for testing a wireless device, said test apparatus comprising a transceiver unit adapted to communicate with said device under test, DUT, via a wireless link; a processing unit adapted to control said transceiver unit and to detect a communication service used by said device under test, DUT, during communication with said transceiver unit; and an output unit adapted to output the communication service detected by said processing unit.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: April 10, 2018
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Pirmin Seebacher
  • Patent number: 9042848
    Abstract: A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (RF) transmitter module. The method includes deriving a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a constant power amplifier module gain based on a gain compression factor, setting an envelope tracking path of the transmitter module into an envelope tracking mode in which mapping between the instantaneous envelope of the waveform signal and the power amplifier module supply voltage is performed using the derived mapping function, applying a training signal comprising an envelope that varies with time to the RF transmitter module, measuring a battery current, modifying the gain compression factor based on the measured battery current, and re-deriving the mapping function based on the modified gain compression factor.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: May 26, 2015
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Manel Collados Asensio, Hsin-Hung Chen, Jonathan Richard Strange
  • Patent number: 9031522
    Abstract: The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: May 12, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Brian Baxter, Jason Millard, Roman Zbigniew Arkiszewski, Steven Selby
  • Patent number: 9020495
    Abstract: Method and arrangement in a base station, a user equipment and a positioning node, for sending, and obtaining, respectively, a value of a propagation delay of a signal. The signal is sent to the base station from a user equipment. The base station and the user equipment are comprised within a wireless communication system. Also, the base station and the user equipment are adapted to exchange wireless signals. The method is characterized by the step of receiving a signal sent from the user equipment. The method is further characterized by the step of measuring the value of the signal propagation delay of the received signal. Still further, the method is characterized by the step of sending the measured value to the equipment and/or to a positioning node comprised within the wireless communication system.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: April 28, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Muhammad Kazmi, Martin Israelsson, Dirk Gerstenberger, Torbjörn Wigren, Robert Baldemair
  • Patent number: 8989681
    Abstract: A communication apparatus (200) has a calibration mode in which a signal is passed through circuitry (30, 80) of the apparatus, and a controller (160) measures the response of the circuitry (30, 80) to the signal and adjusts the circuitry (30, 80) to improve performance. The signal used for calibration has a wider bandwidth than the bandwidth of signals used for transmission. The wider bandwidth may be provided by reconfiguring a digital filter (20) from low-pass to high-pass.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 24, 2015
    Assignee: NXP, B.V.
    Inventors: Harish Kundur Subramaniyan, Ajay Kapoor
  • Patent number: 8983394
    Abstract: Embodiments are disclosed of a switchplexer for performing test operations on a radio device. The switchplexer comprises a plurality of test ports corresponding to a plurality of radio device ports and a plurality of switches for routing test signals between the individual test ports. Processing logic is disclosed for controlling actuation of the switches to route test signals between individual test ports. The switchplexer disclosed herein may be incorporated into a mobile test device for self-test operations or may be used in a manufacturing or maintenance facility for testing and calibration operations.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: March 17, 2015
    Assignee: BlackBerry Limited
    Inventors: John Bradley Deforge, Daniel Noel Badiere, Christopher DeVries
  • Patent number: 8976895
    Abstract: Method for calibrating a linearizer and linearized electronic component the method comprises predistortion, in a predistortion linearizer, of a signal upstream of an electronic component to compensate nonlinear distortion. Determining predistortion setting parameters comprises applying a bifrequency test signal to the component and measuring the relative amplitudes of the lines at the output of the component. A variable indicative of the magnitude |Kp| of the AM/PM conversion coefficient of the component is calculated on the basis of these measurements. The predistortion setting parameters are adjusted so as to minimize |Kp|. The method may in particular be implemented in a linearized amplifier device and in an amplifier test bench.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: March 10, 2015
    Assignee: Centre National d'Etudes Spatiales
    Inventors: Jacques Sombrin, Xavier Giraud, Alexandre Guerin, Guy Lesthievent, Jean-Pierre Millerioux, Xavier Deplancq
  • Patent number: 8965454
    Abstract: In one embodiment, an amplifier system has a tap, a delay filter, a linearized amplifier, and a hybrid combiner. The tapped portion of an input signal is amplified by the amplifier, the untapped portion of the input signal is delayed by the delay filter, and the combiner combines the resulting amplified, tapped portion and the delayed, untapped portion to generate an amplified output signal. By re-combining the delayed, untapped portion of the input signal with the amplified, tapped portion, the power of the untapped portion is not lost, and the amplifier does not have to compensate for all of the distortion that would otherwise be associated with the total output power level. Such an amplifier system is applicable, for example, in upgrading an existing GSM cell site to support both GSM communications as well as UMTS communications without degrading GSM operations.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: February 24, 2015
    Assignee: Andrew LLC
    Inventors: George P. Vella-Coleiro, Josef Ocenasek, Jeffrey G. Strahler, Christopher F. Zappala
  • Patent number: 8954054
    Abstract: The disclosure discloses a method for processing/testing of a called terminal and a Long Time Evolution (LTE) system. The method comprises that: a network side of the LTE system sends a paging message to the terminal residing in an LTE cell which is called by a Circuit Switched (CS) domain service; the terminal establishes a Radio Resource Control (RRC) connection with the network side; the terminal sends to the network side a message for requesting to establish a CS domain service; the network side indicates, to the terminal, carrier frequency information of a Global System for Mobile Communications (GSM) cell to which the terminal needs to be redirected; the terminal sends a channel request message to the GSM cell; the terminal performs routing area updating in the GSM cell; the terminal sends a paging response message to the GSM cell; the terminal establishes the CS domain service in the GSM cell.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: February 10, 2015
    Assignee: ZTE Corporation
    Inventor: Wei Ma
  • Patent number: 8934856
    Abstract: A system and method provide for calibrating the frequency response of an electronic filter. The system and method include a radio transmitter with both in-phase and quadrature baseband paths. Each baseband path includes a numerically controlled oscillator (“NCO”), a digital signal path, a digital-to-analog converter (“DAC”), and an analog filter. A low frequency tone is applied from the NCO from one of the baseband path, while a high frequency tone is applied from the NCO in the other baseband path. An analog peak detector at output determines which analog filter has the largest amplitude at the output. The peak detector offset between the two analog filters is offset by stimulating the in-phase and quadrature baseband paths with the respective NCOs to find an amplitude difference between the output signals from the NCOs that makes the output of the analog filters the same.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: January 13, 2015
    Assignee: Analog Devices, Inc.
    Inventors: David J. McLaurin, Christopher Mayer
  • Patent number: 8913969
    Abstract: The present disclosure relates to amplitude based pre-distortion calibration of an RF communications terminal, such as a cell phone, by transmitting a first standard RF transmit burst from the RF communications terminal to an RF test instrument, which assimilates the first standard RF transmit burst. A calibration control system extracts information regarding the first standard RF transmit burst from the RF test instrument; determines amplitude based distortion of the RF communications terminal using the extracted information; determines amplitude based pre-distortion calibration information using the determined amplitude based distortion; and calibrates the RF communications terminal using the amplitude based pre-distortion calibration information. By using a single-shot transmit burst, calibration times may be minimized.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: December 16, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Hirofumi Honjo, Suryanarayana Pappu, Mikko Sannala, Ricke W. Clark
  • Patent number: 8903002
    Abstract: A computational processor uses a binary signal, being a set of 1- or 0-valued elements of a same number as a number of elements in an input signal, to generate computational data whose elements are exclusive OR values between each element of the input signal and a corresponding element in the binary signal at a same position. The modulator 13 modulates the input signal and the computational data according to a primary modulation scheme, and generates primary-modulated signals. An IFFT calculator applies an inverse fast Fourier transformation to the primary-modulated signals to generate inverse transformation data. A transmitter generates a baseband signal based on generated inverse transformation data whose peak-to-average power ratio matches a standard, and generates and transmits a transmission signal from the baseband signal and data specifying computations conducted to generate the inverse transformation data that matches the standard.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: December 2, 2014
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8903339
    Abstract: A gain adjustment device for a wireless communication circuit comprising a transmission circuit and a reception circuit includes a signal generator and a gain adjustment circuit. The signal generator is coupled to the transmission circuit, and arranged for generating a test signal to the transmission circuit. The test signal transmitted through a printed circuit board such that the reception circuit coupled to the transmission circuit generates a corresponding reception signal in response to the test signal. The gain adjustment circuit is coupled to the reception circuit and the transmission circuit, and arranged for adjusting a transmitter gain configuration and a receiver gain configuration of the wireless communication circuit according to the reception signal.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: December 2, 2014
    Assignee: Realtek Semiconductor Corp.
    Inventor: Chin Su
  • Patent number: 8891671
    Abstract: A method for calibrating a channel which includes: performing slide-window correlation on a delayed downlink service signal of a current transmit channel and a feedback signal of the transmit channel, and performing sampling to obtain a group of correlation values of the transmit channel in a sliding window; determining a peak amplitude value among amplitude values of the group of correlation values in the sliding window, and amplitude values at two points that are left adjacent and right adjacent to a point corresponding to the peak amplitude value; performing an interpolation operation on the peak amplitude value and the amplitude values at the two points that are left adjacent and right adjacent to the point to obtain an amplitude value, a delay and a phase at an actual peak point in the group of correlation values of the transmit channel in the sliding window; and calibrating the transmit channel.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: November 18, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Shaoming Li
  • Patent number: 8880092
    Abstract: Multiple smart meters periodically measure strengths of detected signals generated by fixed position wireless devices. A centrally located location determining system receives this data, and correlates received strengths of the signals generated by the specific fixed position wireless devices with the physical locations of the measuring smart meters. Periodically, updated signal strengths are received, and stored correlations are replaced with updated correlations. Strengths of signals generated by fixed position wireless devices are received from a mobile computing device, as measured by the mobile device. The location determining system compares the signal strengths received from the mobile computing device to the most current strengths of signals of the same fixed position wireless devices, as measured by multiple smart meters, so as to perform triangulation and determine the physical location of the mobile device.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: November 4, 2014
    Assignee: Symantec Corporation
    Inventor: Shaun P. Cooley
  • Patent number: 8880002
    Abstract: 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.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: November 4, 2014
    Assignee: Elektrobit System Test Oy
    Inventors: Marko Falck, Pekka Kyösti, Petteri Heino, Jukka-Pekka Nuutinen, Jouni Saastamoinen
  • Patent number: 8867656
    Abstract: When a determination is made that communication by an SM scheme is suitable, a setting unit performs switching from a communication level by an STC scheme to the communication level by the SM scheme, between the communication level at a first level of MCS by the space-time coding scheme and the communication level at a second level of MCS by the SM scheme. When a determination is made that communication by the SM scheme is unsuitable, the setting unit performs switching from the communication level by the STC scheme to the communication level by the spatial multiplexing scheme, between the communication level at a third level of MCS, which is higher than the first level, by the space-time coding scheme and a fourth level of the modulation scheme and the coding rate, which is higher than the second level, by the SM scheme.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: October 21, 2014
    Assignee: KYOCERA Corporation
    Inventor: Takeo Miyata
  • Patent number: 8862076
    Abstract: There is provided a method of method of estimating a quality of a signal, the method in a first device comprising measuring a signal transmitted from a second device to a third device; determining a value of a metric from an autocorrelation function of the measured signal; and determining an estimate of the quality of the signal from the determined metric.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: October 14, 2014
    Assignee: Intel Corporation
    Inventor: Nicholas William Whinnett
  • Patent number: 8862153
    Abstract: An automated portable call collection unit (APCCU) may gather information used in testing the accuracy of a wireless mobile device locating system. A GPS ground truth detector may detect the location of the APCCU based on GPS signals. A cellular GPS detector may detect GPS signals identified by a signal-identification communication from the locating system. An internal clock may keep time and synchronize its time to GPS time as announced periodically by GPS time signals. A controller may repeatedly cause a cellular network communication system to wirelessly request and receive the signal-identification communication and to send the information about the detected GPS signals, the locations, and the times. All of this may be done in a manner that insures that the accuracy of the locating system is not tested before the internal clock is first synchronized to GPS time following application of operating power to the APCCU.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: October 14, 2014
    Assignee: Cellco Partnership
    Inventors: Robert M. Iwaszko, Jeff Torres, Todd Covington
  • Patent number: 8855182
    Abstract: In an emphasis optimization device, a calculating unit calculates an inverse characteristic of an amplitude characteristic based on the amplitude characteristic of a transmission path, and an inverse Fourier transform unit performs an inverse Fourier transform on the inverse characteristic to obtain an impulse response. An extracting unit extracts, from the obtained impulse response, an impulse response corresponding to the number of taps necessary for emphasis to be added to a digital signal to be transmitted on the transmission path. An emphasis amount calculating unit converts the extracted impulse response into a value of the emphasis to calculate an emphasis amount.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 7, 2014
    Assignee: Anritsu Corporation
    Inventors: Takashi Murakami, Kosuke Sasaki, Ken Mochizuki
  • Patent number: 8831532
    Abstract: Methods and apparatuses to select a transmit antenna in a mobile wireless device connected to a wireless network are described. The mobile wireless device monitors received signal characteristics through first and second antennas and switches antennas based on the monitored signal characteristics and on an assessment of the sufficiency of available transmit power headroom to accommodate data transmissions in the uplink direction. Sufficiency is determined based on one or more criteria including achievable data rate throughput, quality of service, grade of service, an amount of data buffered, an amount of resources allocated by the wireless network and a number of “power up” commands received by the mobile wireless device during a pre-determined time interval.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Apple Inc.
    Inventors: Gaurav R. Nukala, Venkatasubramanian Ramasamy
  • Patent number: 8831593
    Abstract: Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: September 9, 2014
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Matthew Thomas Melester, Stefan Eisenwinter, Ahmed H. Hmimy, Massimiliano Mini, Joerg Stefanik, Alfons Dussmann
  • Patent number: 8831071
    Abstract: Communication devices and methods are disclosed, wherein a test signal is generated at a first frequency and a higher harmonic of said test signal is received and processed at a second frequency higher than said first frequency.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: September 9, 2014
    Assignee: Intel Mobile Communications GmbH
    Inventors: Markus Hammes, Stefan Van Waasen
  • Patent number: 8817641
    Abstract: According to an embodiment, a communication terminal is described comprising two radio communication modules and a controller configured to, in response to the reception of a request for starting communication using the second radio communication module, perform at least one of requesting from a communication device to perform reception quality measurements of signals received from the first radio communication module if the first radio communication module is transmitting signals to the communication device; and performing reception quality measurements of signals received from the communication device by the first radio communication module if the first radio communication module is receiving signals from the communication device.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: August 26, 2014
    Assignee: Intel Mobile Communications GmbH
    Inventors: Hyung-Nam Choi, Maik Bienas, Andreas Schmidt
  • Patent number: 8818289
    Abstract: A measuring device for measuring a device under test comprises a first subscriber, a second subscriber, a first virtual antenna array and a processing device. The device under test in this context is a mobile station. The first virtual antenna array comprises at least two mobile stations. The first virtual antenna array contains the device under test. The first subscriber is arranged in such a manner that it transmits signals to the first virtual antenna array. The first virtual antenna array in this context is arranged in such a manner that it transmits signals at least indirectly to the second subscriber. The processing device is designed in such a manner that it compares signals transmitted to the device under test and transmitted from the device under test.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: August 26, 2014
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Adrian Schumacher
  • Patent number: 8811192
    Abstract: An electronic device may include wireless circuitry such as cellular telephone transceiver circuitry and wireless local area network (WLAN) transceiver circuitry. The telephone transceiver may be used to establish long-range wireless connectivity, whereas the WLAN transceiver may be used to establish short-range wireless connectivity. The performance of the WLAN transceiver may suffer in the presence of heat-generating operations. The performance of the WLAN transceiver may be tested using test equipment while the electronic device is configured in a test mode and a normal user mode. During testing, the WLAN transceiver may be directed to transmit radio-frequency signals while the telephone transceiver is toggled on and off. The test equipment may be used to analyze the radio-frequency signals to measure the transmit power level, transmitter constellation error, transmit spectrum mask, and other performance parameters to determine whether that device under test satisfies design criteria.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: August 19, 2014
    Assignee: Apple Inc.
    Inventor: Anh Luong
  • Patent number: 8798198
    Abstract: A calibration system may be provided for calibrating wireless communications circuitry in an electronic device during manufacturing. The calibration system may include data acquisition equipment for receiving an amplitude-modulated calibration signal from the electronic device. The calibration system may include calibration computing equipment for extracting pre-distortion coefficients from the amplitude-modulated calibration signal. The calibration computing equipment may be configured to detect a bulk phase drift in the amplitude-modulated calibration signal. The calibration computing equipment may be configured to remove the bulk phase drift from the amplitude-modulated calibration signal. The wireless communications circuitry may include a power amplifier that distorts a signal generated by the wireless communications circuitry. The wireless communications circuitry may include a pre-distortion compensator for countering the distortion.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: August 5, 2014
    Assignee: Apple Inc.
    Inventor: Gary Lang Do
  • Patent number: 8788892
    Abstract: System and method for testing a radio frequency (RF) device under test (DUT) communicating using multiple radio access technologies (RATs). Single data signal sequences having characteristics of multiple RATs as prescribed by signal standards are exchanged between a tester and DUT. The tester and DUT process received signal sequences substantially in parallel with their reception. A pattern of contemporaneous signal sequence reception and processing continues for as many RATs as the DUT is capable of supporting.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: July 22, 2014
    Assignee: Litepoint Corporation
    Inventors: William L Barker, Jr., James Lawrence Banzen
  • Patent number: 8787839
    Abstract: To provide a mobile communication terminal test device and a mobile communication terminal test method capable of enabling a tester to intuitively know a set transmission power variation. A mobile communication terminal test device 1 includes: a pseudo base station device 10 that transmits and receives a signal to and from a mobile communication terminal 5; a transmission power setting display processing unit 22 that generates an input screen for inputting the set values of the transmission power of the pseudo base station device 10 and a variation in the transmission power over time; an operation unit 31 that inputs the set values; a transmission power graph display processing unit 23 that generates a graph indicating the variation in the transmission power over time using the set values; and a display unit 33 that displays the graph.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: July 22, 2014
    Assignee: Anritsu Corporation
    Inventors: Junya Tanaka, Yasuyuki Matsuyama, Takuma Goto
  • Patent number: 8787847
    Abstract: A method and an apparatus for calibration of a transmitter not having a Surface Acoustic Wave (SAW) filter are provided. The apparatus includes a calibration unit for outputting a detuning signal by which a resonance frequency of a Radio Frequency (RF) circuit is detuned with respect to a transmit operating frequency, and an RF unit for changing the resonance frequency according to the detuning signal and for outputting an out-of-band noise and a transmit signal having a relatively lower power than that of a case where the resonance frequency and the transmit operating frequency are tuned to each other.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: July 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-Bum Jun, In-Yup Kang, Min-Goo Kim, Chang-Joon Park, Won-Suk Choi
  • Patent number: 8781416
    Abstract: A processor determines, from signals received from other communication devices, one selected transmission mode for the communication channel conditions. The processor projects multiple channel characterization parameters in a mathematical model to each of the candidate transmission modes using a model of nominal communication channel conditions to predict whether each of the candidate transmission modes will achieve the desired communication under the nominal communication channel conditions. This results in the generation of a first subset of transmission modes. The processor also projects the multiple channel characterization parameters to each of the candidate transmission modes using a model of degraded communication channel conditions to predict whether each of the candidate transmission modes will achieve the desired communication under the degraded communication channel conditions.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: July 15, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Stephen M. Clark, Ray L. Cross
  • Patent number: 8774012
    Abstract: A disclosed wireless communication device performing transmission and reception in a time-division manner includes an antenna, a transmission unit, a reception unit, a transmission/reception switchover unit, a first path switchover unit, a directional coupler, a second path switchover unit, a first fault diagnosis unit, and a second fault diagnosis unit. The second fault diagnosis unit causes the second path switchover unit to form a reflection signal input path; causes a second transmission signal level-adjusted for fault diagnosis to be outputted from the transmission unit; acquires a signal level of a reflection signal from the antenna inputted from the directional coupler into the reception unit; and determines whether or not a transmission radio wave is normally emitted from the antenna based on the signal level of the reflection signal.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: July 8, 2014
    Assignees: Masprodenkoh Kabushikikaisha, Denso Corporation
    Inventors: Toru Sakamoto, Masahiro Kuwabara, Minoru Okada
  • Patent number: 8750811
    Abstract: A method and apparatus for using an antenna selection signal for selecting a transmit diversity parameter, including phase difference and/or power ratio between concurrently transmitting antennas.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: June 10, 2014
    Assignee: Google Inc.
    Inventors: Haim Harel, Sherwin J. Wang
  • Patent number: 8731537
    Abstract: A mobile device has operating resources available to it. A measurement generator provides measurements of the operating resources and a context awareness engine identifies which of the operating resources may be efficiently utilized by a service application in view of context conditions in which the mobile device is operating. A selection controller selects, based on the measurements, at least one of the identified operating resources for use by the service application to improve or optimize a cost of the mobile device.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: May 20, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Mark Leo Moeglein, Lionel Jacques Garin
  • Patent number: 8731493
    Abstract: A system for performing wireless local area network testing of wireless devices may include a wireless local area network tester and a device under test. The tester and device under test may communicate over a wireless link. To ensure that the tester accurately analyzes test data, a data rate table is used that specifies fixed data transmission rates to be used by the device under test under both high-quality link conditions and low-quality link conditions. This forces the device under test to transmit control packets at the same high data rate during packet loopback testing, regardless of link quality. When the captured control packets are analyzed at the tester, both low-link-quality data and high-link-quality data may be analyzed using a common test template, ensuring accurate results.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: May 20, 2014
    Assignee: Apple Inc.
    Inventors: Anh Luong, Justin Gregg
  • Patent number: 8712347
    Abstract: A wireless communication system is disclosed including a MIMO wireless communication apparatus that can communicate through multiple antennas and a non-MIMO wireless communication apparatus that can communicate through a single antenna or multiple antennas. The MIMO wireless communication apparatus includes a communication unit configured to transmit and receive control information divided into a second control information containing information related to the demodulation and decoding of traffic channel and a first control information containing information related to the MIMO separation of the second control information.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: April 29, 2014
    Assignee: Fujitsu Limited
    Inventors: Takashi Dateki, Tetsuya Yano
  • Publication number: 20140113577
    Abstract: A method for monitoring a high-frequency transmit device of a magnetic resonance tomography system with a transmit antenna system having a plurality of transmit channels is provided. A reference transmit signal is output on different transmit channels of the transmit antenna system, respectively, at different time points, and a reference measurement signal induced by the reference transmit signal is measured on at least one of the other transmit channels using a measuring device assigned to the transmit channel. Based on the reference measurement signal, a phase deviation indicator value is determined. The phase deviation indicator value indicates a relative phase deviation between the measuring devices of the transmit channels in question.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 24, 2014
    Inventors: Olaf Behrendt, Pascal Mühlich, Volker Schnetter, Christian Wünsch
  • Patent number: 8699959
    Abstract: A method for monitoring voice quality in a communication network. In a first embodiment, the method comprises the steps of: establishing a voice communication pathway (VCPW) between first and second telephone terminals; establishing speech cadence between first and second terminals, wherein the terminals alternate between opposing send and listen/receive modes such that when one of the terminals is sending a voice test message the other terminal is either listening for or receiving the voice test message and vice versa; and calculating a voice quality score for one or more received voice test messages. In a second embodiment, synchronous cadence is established between a plurality of telephone terminals and a voice recognition server (VRS).
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: April 15, 2014
    Assignee: Spirent Communications, Inc.
    Inventors: Dimitrios M. Topaltzas, Jeffrey Horner
  • Publication number: 20140099907
    Abstract: A method and apparatus for measuring a complex gain of a transmit path are disclosed. During a test mode, an IQ to radio frequency modulator modulates a quadrature RF carrier signal using a quadrature test signal. An RF to IQ down-converter down-converts a down-converter RF input signal to provide a quadrature down-converter output signal using the quadrature RF carrier signal. The down-converter RF input signal is based on the quadrature test signal and the gain of the transmit path. A digital frequency converter frequency converts the quadrature down-converter output signal, providing an averaged frequency converter output signal, which is a quadrature direct current signal representative of an amplitude of the quadrature test signal and the gain of the transmit path. Therefore, a measured gain of the transmit path is based on the amplitude of the quadrature test signal and averaged frequency converter output signal.
    Type: Application
    Filed: May 31, 2012
    Publication date: April 10, 2014
    Applicant: RF MICRO DEVICES, INC.
    Inventor: Jean-Frederic Chiron
  • Patent number: 8670729
    Abstract: Methods and systems for level detector calibration are disclosed and may comprise calibrating a level detector integrated on-chip to eliminate an associated zero input offset voltage utilizing a replica bias circuit with no input ac voltage at the level detector or the replica bias circuit. The offset voltages of the level detector and the replica bias circuit may be combined to eliminate the associated zero input offset voltage of the level detector. The output signal may be generated by a difference of output signals from the level detector and the replica bias circuit. The level detector and the replica bias circuit may be biased utilizing a similar bias voltage. A plurality of known input voltages may be utilized to generate a corresponding plurality of output voltages of the level detector, generating a corrected transfer function that may be used to accurately set a transmitter power level.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: March 11, 2014
    Assignee: Broadcom Corporation
    Inventor: Arya Behzad
  • Patent number: 8666323
    Abstract: Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: March 4, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Donghan Lee, Sang Gee Kang, Kwang-Soo Cho, Man Sik Park, Chan-Won Park, Cheng-Hao Quan, Ji-Hoon Bae, Gil Young Choi, Jong-Suk Chae
  • Patent number: 8649736
    Abstract: The invention concerns a test method for a transmitter-receiver circuit. This transmitter-receiver circuit includes an antenna, connected to a processing unit, arranged for receiving signals and converting their frequency. The transmitter-receiver circuit also includes a power amplifier connected to said antenna and arranged for sending transmission signals.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: February 11, 2014
    Assignee: EM Microelectronic-Marin SA
    Inventors: Arthur Descombes, Tindaro Pittorino
  • Patent number: 8639197
    Abstract: According to one exemplary embodiment, a method of preventing harmonics from causing distortion in a communications system includes feeding a test signal through a pre-distortion circuit in the communications system to a transmitter in the communications system. The method continues by transmitting a distorted output signal produced by the transmitter to an analyzer, analyzing the distorted output signal to identify one or more undesired harmonics, and generating and sending calibration data from the analyzer to calibrate the pre-distortion circuit, thereby preventing the one or more undesired harmonics from causing distortion in the communications system. In one embodiment, a system to prevent harmonics from causing distortion in a communications system includes a pre-distortion circuit, a transmitter, and an analyzer configured to identify one or more undesired harmonics and to generate and send calibration data to prevent the undesired harmonics from causing distortion.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: January 28, 2014
    Assignee: Broadcom Corporation
    Inventor: Meng-An Pan
  • Patent number: 8625713
    Abstract: In one embodiment, the method includes receiving a pilot signal from a terminal at a target antenna of the plurality of antennas of the network element, determining an uplink channel estimate for the target antenna based on the received pilot signal, and obtaining a calibration coefficient associated with the target antenna. The calibration coefficient is based on a channel estimate between the target antenna and a different one of the plurality of antennas. The method further includes beamforming a transmission to the terminal using at least the target antenna based on the determined uplink channel estimate and the obtained calibration coefficient.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: January 7, 2014
    Assignee: Alcatel Lucent
    Inventors: Li Li, Thomas Marzetta
  • Patent number: 8615206
    Abstract: The present invention relates to a method and system for a radio transmission emulator. In one embodiment, the present invention includes a radio transmission emulator system. The radio transmission emulator system includes a radio transmission emulator, an automobile, and/or a radio data analysis unit. The automobile can include a radio receiving unit. The radio transmission emulator generates a field simulation signal which simulates interferences. The field simulation signal is transmitted from the radio transmission emulator to the radio receiving unit. The radio receiving unit generates the radio data based on the field simulation signal. The radio data analysis unit analyzes the radio data to determine whether adjustments should be made to the radio receiving unit.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: December 24, 2013
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventor: Ming Michael Meng
  • Patent number: 8605776
    Abstract: A comparator circuit compares a test pattern generated by a test pattern generator circuit, with a test pattern transmitted to a memory card and returned from the memory card. A control circuit determines a bandwidth corresponding to frequency components correctly transmitted between a host apparatus and the memory card, based on the returned test pattern, and selects an encoding method requiring a maximum available bandwidth. The control circuit generates a notification message indicating the selected encoding method, and encodes the notification message using the selected encoding method, and transmit the encoded notification message to the memory card. The control circuit establishes communication between the host apparatus and the memory card, when receiving a response message including an acknowledgement to the notification message, from the memory card.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: December 10, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Suenaga, Kohei Masuda, Hiroshi Tanaka, Tsuyoshi Ikushima, Takeshi Nakayama
  • Patent number: 8600371
    Abstract: An apparatus for determining a health of radio-frequency transmitters each transmitting a transmitted signal during normal operation. The apparatus comprises a receiver for receiving received signals, each received signal responsive to a transmitted signal, a first element for determining signal parameters of each received signal, the signal parameters responsive to an operating condition of a transmitter, each transmitted signal and each associated received signal including an identifier of the transmitter that transmitted the transmitted signal, the apparatus using the identifier to link determined signal parameters with the transmitter that transmitted the transmitted signal and a second element for determining a health of the transmitter that transmitted the transmitted signal, the health responsive to a relationship between one or more signal parameters and a selected value or a range of selected values for each signal parameter.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: December 3, 2013
    Assignee: Locus Location Systems LLC
    Inventors: Danny Caudill, Michael Keefe, Charna Parkey, Robert Mitchell, Murad Qahwash, John McCarthy
  • Patent number: 8594674
    Abstract: a measurement method for minimization of drive test (MDT) comprises steps of: receiving measured frequency information for cell reselection and measured frequencies for MDT; measuring a quality of a serving cell; performing a first quality measurement on a neighboring cell; performing a second quality measurement on the neighboring cell; and storing results of the first and second quality measurements, wherein the step of performing the first quality measurement includes performing an intra-frequency measurement for the MDT on the neighbor cell when the frequency of the serving cell is included in the MDT frequencies, and performing the intra- frequency measurement for the neighbor cell only in the event where the quality of the serving cell in a first threshold value or less when the frequency of the serving cell is not included in the MDT frequencies, and the step of performing a second quality measurement includes performing an intra- frequency measurement for the MDT on the neighbor cell when an inter-fre
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: November 26, 2013
    Assignee: LG Electronics Inc.
    Inventors: Sung Hoon Jung, Sung Duck Chun, Seung June Yi, Young Dae Lee, Sung Jun Park
  • Patent number: 8594592
    Abstract: A transmitter, a base station device, and a method for aligning a signal output from a transmitter are provided. The transmitter is connected to a first antenna, and the first antenna detects a second test signal transmitted by a second antenna that is connected to another transmitter. The transmitter includes: a signal generating unit, which generates a first test signal; a directional coupler, which receives the first test signal and the second test signal; and a signal processing unit, which measures a timing difference between the first test signal and the second test signal, and uses the measured timing difference to control signal generation, so as to align a signal transmission delay between the two transmitters. Thus, closed-loop detection and an adaptive rectification mechanism for transmission signals of multiple transmitters can be implemented, and accuracy of aligning a signal at each transmitting antenna is improved.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: November 26, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Gang Li