Patents Assigned to Anritsu Corporation
  • Optimization method of optimally setting emphasis and optimization device for optimally setting emphasis
    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
  • SIGNAL ANALYSIS APPARATUS AND SIGNAL ANALYSIS METHOD
    Publication number: 20140294199
    Abstract: To provide a signal analysis apparatus and a signal analysis method which can expand a dynamic range. A spectrum analyzer 1 includes a frequency conversion unit 10 that includes an S-ATT 11 which adjusts the level of an analog input signal and converts the input signal into a predetermined intermediate frequency signal, a V-ATT 21 that adjusts the level of an output signal from the frequency conversion unit 10, an ADC 23 that converts an output signal from the V-ATT 21 into a digital signal, an f-response correction filter 24 that corrects the frequency response of an output signal from the ADC 23, and a noise floor level subtraction unit 25 that subtracts the noise level of the ADC 23 from a noise floor level indicating an overall noise level of the S-ATT 11 to the f-response correction filter 24 in a predetermined frequency band.
    Type: Application
    Filed: December 16, 2013
    Publication date: October 2, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Toru Otani, Norihiro Akiyama
  • MILLIMETER-WAVE BAND SPECTRUM ANALYSIS DEVICE AND ANALYSIS METHOD
    Publication number: 20140292305
    Abstract: An input signal Sx in a first millimeter-wave frequency band higher than 100 GHz is input to a millimeter-wave band filter 20 in which a pair of radio wave half mirrors 30A and 30B so as to opposite to each other and which performs a resonance operation. A signal component Sa corresponding to the resonance frequency of the filter is extracted, is mixed with a first local signal L1 with a fixed frequency, and is converted into a signal in a second frequency band. The converted signal component Sb is mixed with a second local signal L2 whose frequency is swept and is converted into a signal in a predetermined intermediate frequency band. Then, the level of the signal is detected. The millimeter-wave filter 20 has high selectivity characteristics in a frequency domain higher than 100 GHz and can change its passband center frequency.
    Type: Application
    Filed: March 14, 2014
    Publication date: October 2, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Masaaki Fuse, Akihito Otani, Hitoshi Sekiya
  • RADIO WAVE HALF MIRROR FOR MILLIMETER WAVE BAND AND METHOD OF FLATTENING TRANSMITTANCE THEREOF
    Publication number: 20140292447
    Abstract: To provide a radio wave half mirror for a millimeter wave band which can flatten transmittance characteristics and a method of flattening the transmittance of the radio wave half mirror for a millimeter wave band. A radio wave half mirror 20 includes a metal plate 21 that has an outward shape closing a transmission line 11 and a slit 22 for transmitting electromagnetic waves that is provided in the metal plate 21 along a long side of an opening of the transmission line 11. The thickness L of the metal plate 21 in a direction in which the electromagnetic waves pass through the slit 22 is set on the basis of the transmittance characteristics of the electromagnetic waves.
    Type: Application
    Filed: March 17, 2014
    Publication date: October 2, 2014
    Applicant: ANRITSU CORPORATION
    Inventor: Takashi Kawamura
  • Emphasis-adding system and emphasis-adding method
    Patent number: 8832603
    Abstract: A display part is provided with a display screen with a horizontal axis representing a time and a vertical axis representing an amount of modulation and a pre-emphasis waveform image is displayed on the display screen. In the pre-emphasis waveform image, a cursor can be arranged on a tap which corresponds to a portion in which a bit can be emphasized. An emphasis waveform addition part generates an emphasis waveform corresponding to the pre-emphasis waveform image on the display screen, based on an amount of amplitude changed according to movement of the cursor, and adds the emphasis waveform to the test signal. Thus, a user is allowed to make a setting with intuitive operation.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: September 9, 2014
    Assignee: Anritsu Corporation
    Inventors: Taketo Saito, Tomoyuki Ikai
  • TEST SIGNAL GENERATION APPARATUS AND METHOD BASED ON LTE-ADVANCED SYSTEM
    Publication number: 20140242919
    Abstract: To provide a technique for simplifying a parameter setting process required to generate a test signal based on an LTE-Advanced system. Carrier arrangement designation means 25 displays a screen for selecting one of an intra-band type or an inter-band type as the arrangement of a plurality of component carriers used in an LTE-Advanced system such that one of the intra-band type or the inter-band type is designated. Parameter file designation means 26 designates a parameter file to be allocated to the component carrier among test signal generating parameter files stored in a parameter file storage means 24. Parameter and frequency band allocation means 27 designates the component carrier to which the designated parameter file can be allocated and the allocated frequency band for communication in which the component carriers are arranged.
    Type: Application
    Filed: November 19, 2013
    Publication date: August 28, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Takashi Matsumoto, Yoshihiro Shiozawa
  • FADING SIMULATOR AND FADING SIMULATION METHOD
    Publication number: 20140242976
    Abstract: A fading simulator is provided, which includes a noise generator that generates an additive white Gaussian noise signal, receives a test signal to be input to a mobile communication terminal as a test target, and adds, to the test signal, a radio wave scattering effect, using the additive white Gaussian noise signal. The fading simulator is provided with setting means for setting for causing the noise generator to generate a same additive white Gaussian noise signal as the additive white Gaussian noise signal in the first test, when a first test is performed on the mobile communication terminal, and also for setting for causing the noise generator to generate the additive white Gaussian noise signal of the predetermined level when a second test for re-simulating the first test is performed after the first test.
    Type: Application
    Filed: February 5, 2014
    Publication date: August 28, 2014
    Applicant: ANRITSU CORPORATION
    Inventor: Akihiko Suenaga
  • SIGNAL GENERATION DEVICE, MOBILE COMMUNICATION TERMINAL TEST DEVICE INCLUDING THE SAME, SIGNAL GENERATION METHOD, AND MOBILE COMMUNICATION TERMINAL TEST METHOD
    Publication number: 20140233623
    Abstract: To provide a mobile communication terminal test device that can generate a signal with amplitude-frequency characteristics or phase-frequency characteristics which are changed over time. A mobile communication terminal test device 10 includes a data generation unit 12 that generates a bit stream, a sub-carrier generation unit 31 that receives bit stream data and performs, for example, predetermined encoding, symbol mapping, or sub-carrier mapping to convert the received data into a plurality of sub-carriers based on an OFDM modulation system, a frequency characteristic storage unit 13 that stores table data for predetermined amplitude-frequency characteristics and phase-frequency characteristics, and a frequency characteristic calculation unit 32 that sets the amplitude and phase of each sub-carrier input from the sub-carrier generation unit 31 on the basis of the table data.
    Type: Application
    Filed: January 30, 2014
    Publication date: August 21, 2014
    Applicant: ANRITSU CORPORATION
    Inventor: Akihiko Suenaga
  • Jitter measuring trigger generator, jitter measuring apparatus using the same, method of generating jitter measuring trigger, and method of measuring jitter
    Patent number: 8811463
    Abstract: A phase adjuster 2a receives a trigger clock synchronized with a data signal to be measured as input, and controls the phase of the trigger clock such that the trigger period of samples of the data signal to be measured becomes one sample per bit. An adjustable frequency divider 2b has a frequency division ratio which is set such that a trigger pulse is generated at the fixed timing of the waveform pattern of the data signal to be measured. An interleaving unit 4d uses a discrete value which is in prime relation to the measured pattern length of the data signal to be measured, and acquires data for the number of samples corresponding to the measured pattern length from a sampler 3 by the trigger pulse from the adjustable frequency divider 2b.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: August 19, 2014
    Assignee: Anritsu Corporation
    Inventors: Takashi Murakami, Hisashi Matsumoto
  • Filter unit, mobile communication terminal test system, and mobile communication terminal test method
    Patent number: 8805311
    Abstract: [Problem] To provide a band stop filter unit, a mobile communication terminal test system, and a mobile communication terminal test method that are flexibly adaptable to the addition/change of a specification in a frequency band for mobile communication. [Means for Resolution] There are provided a first variable filter (102) and a second variable filter (103) which are connected to each other in series, respectively have YIG elements to vary tuning frequencies (f1 and f2), and attenuate the desired signal within predetermined bandwidths (?BW1 and ?BW2) having centers of the tuning frequencies. The tuning frequency (f1) and the tuning frequency (f2) are controlled to be the same as each other or around each other when the desired signal is located at a low frequency band side.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: August 12, 2014
    Assignee: Anritsu Corporation
    Inventors: Tomohiko Maruo, Hiroshi Watanabe, Seiichi Ishizaki
  • TESTING APPARATUS AND TEST DISPLAY METHOD
    Publication number: 20140215281
    Abstract: A testing apparatus includes a scenario processing unit that executes a test scenario for operating the testing apparatus to imitate the operation of a base station, a communication unit capable of transmitting and receiving a message to and from a mobile communication terminal, a layer processing unit for processing a message for each layer, a log data storing unit for storing log data indicating transmission of messages between the layers, and a display controller for creating a transmission schedule based on the extracted data associated with system information and causing a display unit to display the transmission schedule. The transmission schedule is written in a tabular form in which a block type of the system information is displayed at a position to which a frame for transmitting the system information is allocated.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 31, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Junya Tanaka, Yasuyuki Matsuyama, Takuma Goto
  • SCENARIO GENERATION DEVICE AND SCENARIO GENERATION METHOD
    Publication number: 20140206345
    Abstract: A scenario generation device includes: a system information schedule generation unit that displays, a first transmission schedule setting environment with a table form that includes a plurality of setting fields which correspond to the positions of a plurality of frames that can be allocated to transmission of system information in mobile communication and to which a type name of the system information can be set, receives the type name which is input to the setting field corresponding to the position of the frame selected, and generates a transmission schedule of the system information on the basis of the input result; and a scenario generation unit that generates a test scenario which is used in a pseudo-base station apparatus and in which a communication sequence related to the system information is described on the basis of the transmission schedule of the system information.
    Type: Application
    Filed: December 9, 2013
    Publication date: July 24, 2014
    Applicant: Anritsu Corporation
    Inventors: Junya Tanaka, Yasuyuki Matsuyama, Takuma Goto
  • TEST DEVICE AND TEST METHOD
    Publication number: 20140204912
    Abstract: To provide a test device and a test method which enable a tester to easily check the allocation of physical channels when testing a mobile communication terminal which performs communication using a time division duplex system and a code division multiple access system. An allocation status display control unit of a test device generates an allocation status display screen 46 indicating the correspondence of the physical channels to a time slot and a channelization code for each connection status on the basis of allocation setting information which is acquired and specified by a setting information acquisition unit. Therefore, the operator can easily check an allocation status for each connection status.
    Type: Application
    Filed: December 9, 2013
    Publication date: July 24, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Junya Tanaka, Yasuyuki Matsuyama, Takuma Goto
  • Mobile communication terminal test device and mobile communication terminal test method
    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
  • Optical pulse test apparatus and method of testing optical transmission path
    Patent number: 8781264
    Abstract: [Task] To enable a test of an optical transmission path using an MMF with a simple configuration in an optical pulse test apparatus which is used for an SFM for long-distance transmission. [Means for Resolution] An optical coupler 22, a light source 21, a connector 23, and an optical receiver 25 are respectively connected to each other by SMF optical paths Fa to Fc. A signal processing unit 30 includes fiber type designation means 31a for designating the type of an optical fiber of a test-target optical transmission path 1 as either an SMF or an MMF, SMF parameter designation means 31b for, when an SMF is designated, designating test parameters including the refractive index of the SMF, and MMF parameter designation means 31c for, when an MMF is designated, designating test parameters including the refractive index of the MMF.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: July 15, 2014
    Assignee: Anritsu Corporation
    Inventors: Tatsuyuki Maki, Osamu Yamashita
  • Mobile communication terminal testing apparatus and method of testing mobile communication terminal
    Patent number: 8768340
    Abstract: There are provided a mobile communication terminal testing apparatus and a method of testing a mobile communication terminal capable of displaying an EVM for each slot. A mobile communication terminal testing apparatus 1 includes a reception unit 12 that receives a transmission signal of a radio frequency from a mobile communication terminal 2, converts the transmission signal into a baseband signal, and outputs the baseband signal as a reception signal having a digital value, an EVM measuring circuit 22 that measures the modulation accuracy of each symbol included in the reception signal, a slot selecting section 32 that selects at least one of a plurality of slots, and a display unit 43 that displays the EVM of each symbol included in the slot selected by the slot selecting section 32.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: July 1, 2014
    Assignee: Anritsu Corporation
    Inventor: Naoki Inoue
  • MOBILE TERMINAL TEST DEVICE AND METHOD
    Publication number: 20140162630
    Abstract: At the beginning of the operation of a mobile terminal 1 to be tested, link establishment means 211 performs a process of establishing a link to the mobile terminal 1. When the link is established, test mode change means 213 transmits a message “downlink Direct Transfer (Activate RB Test Mode)” for setting test mode connection from a base station, returns a response message to a message transmitted from the mobile terminal 1 to be tested, thereby changing the mobile terminal 1 to be tested to a test mode, and performs a transmission and reception test.
    Type: Application
    Filed: November 11, 2013
    Publication date: June 12, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Toshiya Otowa, Naofumi Naruse, Hirofumi Tsujimura
  • MOBILE TERMINAL TEST DEVICE AND METHOD
    Publication number: 20140162604
    Abstract: At the beginning of the operation of a mobile terminal 1 to be tested, link establishment means 211 performs a process of establishing a link to the mobile terminal 1 and location registration means 213 performs a location registration process. Then, test mode change means 214 transmits a message “downlink Direct Transfer (Activate RB Test Mode)” for setting test mode connection from a base station, returns a response message to a message transmitted from the mobile terminal 1 to be tested, thereby changing the mobile terminal 1 to be tested to a test mode, and performs a transmission and reception test.
    Type: Application
    Filed: November 11, 2013
    Publication date: June 12, 2014
    Applicant: ANRITSU CORPORATION
    Inventors: Toshiya Otowa, Naofumi Naruse, Hirofumi Tsujimura
  • Test device and test method for mobile communication terminal
    Patent number: 8743701
    Abstract: It is possible to check the settings of multiplex communication for test or the state of multiplex communication during the test. A test device tests whether a mobile communication terminal, which is a test target, performs a communication operation normally and displays a list of at least the address of the mobile communication terminal and information for identifying a communication partner of the mobile communication terminal as multiplex communication related information when the mobile communication terminal performs multiplex communication on a multiplex communication related display unit 6d of a display unit 6.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: June 3, 2014
    Assignee: Anritsu Corporation
    Inventors: Junya Tanaka, Yasuyuki Matsuyama, Takuma Goto
  • Quadrature modulator, signal generating device, and quadrature modulation method
    Patent number: 8724735
    Abstract: To provide a quadrature modulator, a signal generating device, and a quadrature modulation method capable of correcting a gain balance error, a zero offset error, and an orthogonality error that occur during quadrature modulation. The quadrature modulator 20 includes a quadrature modulation unit 22, a quadrature modulation error calculating unit 40 that calculates quadrature modulation errors on the basis of the power of a quadrature-modulated signal output from the quadrature modulation unit 22, and an error correcting unit 30 that corrects a baseband signal such that the quadrature modulation errors are removed. The quadrature modulation error calculating unit 40 includes a power measuring unit 41 that measures the power of the quadrature-modulated signal, a gain balance error calculating unit 42, a zero offset error calculating unit 43, and an orthogonality error calculating unit 44.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: May 13, 2014
    Assignee: Anritsu Corporation
    Inventors: Shinichi Ito, Tatsuro Hanaya