Abstract: Provided are a mobile terminal test apparatus, a mobile terminal test system, and a control method for a mobile terminal test apparatus, capable of displaying setting information for each signal forming a multiplexed signal on one screen. A part of setting information set in the pseudo base station unit for each of signals forming the multiplexed signal is displayed as first setting information on the display unit, and when one of the signals forming the multiplexed signal is selected in a specific mode by the operation unit, setting information, other than the first setting information, set in the pseudo base station unit for the signal selected by the operation unit is displayed on the display unit, as second setting information such that the second setting information is superimposed on the first setting information.
Abstract: An error rate measuring apparatus includes an operation unit that sets one Codeword length and one FEC Symbol length of FEC according to a communication standard of a device under test, data division means for dividing symbol string data obtained by converting a signal received from the device under test into MSB data and LSB data, a data comparison unit that compares each of the divided MSB data and LSB data with error data to detect MSB errors and LSB errors of each one Codeword length, and detects FEC Symbol Errors of each of the MSB data and the LSB data at one FEC Symbol interval, and error counting means for counting the detected MSB errors and LSB errors, and counting the FEC Symbol Errors.
Abstract: [Problem] There is provided a goods inspection device making it possible to make a diagnosis easily for inspection function failure caused by dynamic behavior of goods attributed to a conveyance subsystem of an inspection line. [Solution] The goods inspection device 1 that inspects goods being carried on an inspection line includes a diagnosis unit 25c that diagnoses a conveyance subsystem of the inspection line, based on data of acceleration and angular velocity obtained with respect to respective axial directions from a test object 2 when the test object 2 having a motion sensor 12 to detect acceleration and angular velocity with respect to respective directions of three-dimensional axes is carried.
Abstract: A measuring device 1 includes an integrated control device 10 that performs control to measure a specific measurement item by performing a measurement operation, a predetermined number of times, of transmitting a test signal and receiving a signal under measurement transmitted from a DUT 100 at a measurement position where the DUT 100, which is rotated by a DUT scanning mechanism 56 in an OTA chamber 50, faces a desired orientation; a disconnection detection unit 18a that detects disconnection of call connection at the measurement position; a reconnection control unit 18b that performs reconnection of the call connection in a case where the disconnection of the call connection is detected; and a measurement return control unit 18c that returns to measurement at a subsequent measurement position from a measurement position where the disconnection of the call connection is detected after reconnection.
June 8, 2021
Date of Patent:
July 12, 2022
Hideyuki Endo, Hironori Watanabe, Takumi Nakamura, Yui Yoshida
Abstract: An error rate measuring apparatus includes an operation unit that sets one Codeword length and one FEC Symbol length of FEC according to a communication standard of a device under test W, a storage unit that stores symbol string data obtained by receiving and converting a signal from the device under test W, data division means for dividing the stored symbol string data into MSB data and LSB data, a data comparison unit that compares each of the divided MSB data and LSB data with error data to detect each of MSB errors and LSB errors of each one Codeword length, and detects FEC Symbol Errors of each of the MSB data and the LSB data at one FEC Symbol interval, and error counting means for counting the detected MSB errors, LSB errors, and FEC Symbol Errors.
Abstract: An object of the present invention is to provide a communication terminal measurement system capable of testing a mobile communication terminal compatible with a plurality of communication standards having overlapping frequency bands in a state where the frequency bands overlap. In the communication terminal measurement system according to the present invention, the control apparatus 31 acquires the second frequency band information from the second storage unit 21m of the second mobile terminal measurement apparatus 21, and inputs parameters for avoiding all or a part of the frequency band to the storage unit 20m of the first mobile terminal measurement apparatus 20, whereby avoiding the mobile communication terminal 11a from refusing to receive signals due to input of signals of both two communication standards.
Abstract: A control device 22 performs the simulative communication operation on a measurement device 20 for transmitting and receiving signals between the base transceiver station compliant with the first communication standard and the terminal 11a and a measurement device 21 for transmitting and receiving signals between the base transceiver station compliant with the second communication standard and the terminal 11a. In the control device 22, the display control unit 30d performs display in a form in which the same number of graphic forms as the number of base transceiver stations compliant with the first and second communication standards are arranged in association with one first cell icon indicating that the base transceiver station is compliant with the first communication standard and one second cell icon indicating that the base transceiver station is compliant with the second communication standard.
Abstract: In a control device 22 having a control unit 31 that controls an NR measurement device 20 and an LTE measurement device 21 and a display unit 33 that displays control contents of the control unit 31, the control unit 31 controls the display unit 33 such that the display unit 33 displays an NR simulation parameter display area 33c1 or an LTE simulation parameter display area 33c2 in accordance with the communication standard of the selected NR or LTE, in a case where the selection of either NR or LTE is received on the communication standard identification tabs 41a and 41b of the main screen 33a.
Abstract: A receiving device 100 includes a reception unit 10, a delay signal generation unit 22, a difference calculation unit 23 that calculates a phase difference between the received signal and the delay signal, a variance calculation unit 24 that calculates a variance of the phase difference within a plurality of calculation sections while sliding a set of the plurality of calculation sections which are set corresponding to a cyclic prefix group assigned to a predetermined symbol group included in the received signal, together on the time axis, a symbol detecting unit 25 that detects a position of a symbol in the symbol group on the time axis, based on the position of the minimum peak of the variance on the time axis, and a synchronization timing signal generation unit 29 that generates a synchronization timing signal, based on information on the position of the symbol on the time axis.
Abstract: A measuring device 1 performs control to perform a reception sensitivity test of measuring a throughput of a signal under measurement, and repeating the measurement while changing an output level of a test signal at each measurement position corresponding to a plurality of orientations. The integrated control device 10 that performs the control includes a measurement situation display control unit 18d that displays a measurement progress display screen having a first display area for displaying a result of the reception sensitivity test up to the measurement position where the reception sensitivity test is completed, and a second display area for displaying a progress situation of the measurement of the reception sensitivity test at the measurement position at which the reception sensitivity test is started.
June 24, 2021
Date of Patent:
June 7, 2022
Hideyuki Endo, Hironori Watanabe, Takumi Nakamura, Yui Yoshida
Abstract: A first shift unit (14) that shifts an amplitude value of the I baseband signal and an amplitude value of the Q baseband signal in a lower direction by the predetermined number of bits so that the predetermined number of lower bits thereof have a value after a decimal point, a first rounding unit (15) that rounds-to-even the amplitude value of the I baseband signal and the amplitude value of the Q baseband signal shifted by the first shift unit (14) with a rounding width of 1 in decimal notation, and a first averaging unit (16) that respectively calculates a time average of the amplitude value of the I baseband signal and the amplitude value of the Q baseband signal rounded by the first rounding unit (15) are included.
Abstract: [Task] There is provided a signal generation apparatus and a signal generation method capable of performing mutual switching between a PAM N signal having n values and a PAM M signal having m values (m<n) without generating a noise or an overvoltage. [Means for Resolution] There are provided a PAM N generation circuit 41 that generates a PAM N signal of n values, a PAM M generation circuit 42 that generates a PAM M signal of m values (m<n) having a maximum voltage level equal to a maximum voltage level of the PAM N signal generated by the PAM N generation circuit 41, and a selector 43 that outputs any one of the PAM N signal generated by the PAM N generation circuit 41 and the PAM M signal generated by the PAM M generation circuit 42.
Abstract: An object of the present disclosure is to prevent an output level of an analog signal from exceeding a predetermined upper limit value, in a module that adjusts a level of the analog signal. According to the present disclosure, there is provided a signal generation apparatus including an RF base module (12) that converts a digital base band signal for testing into an intermediate frequency (IF) signal and outputs the IF signal, and a control unit (18), in which the RF base module is connected to an RF converter (20) which outputs an analog RF signal obtained by frequency-converting the IF signal, and the control unit clips the IF signal output from the RF base module based on an output level of the analog RF signal output from the RF converter.
Abstract: A mobile terminal testing device includes a layer processing unit 3 that communicates with a mobile terminal 10 by performing processing of each layer of a layer-configured communication protocol with a plurality of layers, in which the layer processing unit 3 includes a PHY processing unit 31 that performs multiplexing, channel coding, or the like in order to transmit and receive communication data transmitted to and received from the mobile terminal 10, in which the PHY processing unit 31 transmits a dummy signal, by omitting higher processing from predetermined processing, for an interference signal in multi user-multi input multi output (MU-MIMO) multiplex signals, in a case of testing MU-MIMO terminal-to-terminal interference.
Abstract: Provided is a mobile terminal testing apparatus capable of executing a test for putting any pseudo base station out of service during state transition, such as during handover or during position registration. A mobile terminal testing apparatus includes a plurality of pseudo base station units 18-1, 18-2, and 18-3 that simulate a plurality of base stations, and a scenario processing unit 17 that controls the pseudo base station units 18-1, 18-2, and 18-3 in compliance with a set scenario to execute a test. The scenario processing unit 17 puts the pseudo base station units 18-1, 18-2, and 18-3 set as a base station executing an out-of-service test out of service in a case where a message set as a message to execute the out-of-service test is transmitted from the pseudo base station units 18-1, 18-2, and 18-3 set as a base station transmitting the message to execute the out-of-service test.
Abstract: Provided is a technique for achieving improvement of usability in setting parameters. An error rate measuring apparatus includes a display unit that displays input boxes for inputting one Codeword length and one FEC Symbol length of FEC on a setting screen, and an operation unit that inputs the one Codeword length and the one FEC Symbol length to the corresponding input boxes according to a communication standard of a device under test. A graphic of one Codeword, a graphic of one FEC Symbol, and a graphic of one Codeword including an error for identifying a configuration relationship of an FEC Symbol to a Codeword of the FEC and a correspondence relationship of an FEC Symbol Error to the Codeword are displayed on the setting screen corresponding to the input box of each of the one Codeword length and the one FEC Symbol length of the FEC.
Abstract: There is provided mobile terminal testing device and system capable of reducing a processing load, when testing mobile terminals that support NSA. Included are a first mobile terminal testing device operating as a base station of LTE and a second mobile terminal testing device operating as a base station of 5G NR of NSA, when testing a mobile terminal which supports NSA, the second mobile terminal testing device generates a control signal of 5G NR, transmits the generated control signal of 5G NR to the first mobile terminal testing device, and the first mobile terminal testing device 1 transmits the received control signal of 5G NR to the mobile terminal according to the LTE.
Abstract: In a measurement device 1, a reception sensitivity test control unit 18 includes test condition setting means 18b for setting a predetermined error tolerance level EL, throughput measurement means 18c for measuring a throughput related to reception capacity of the mobile terminal for each transmission and reception, output level setting means 18d for setting an output level of the test signal to be different from a previous output level according to a comparison result between a measurement result of the throughput and a predetermined threshold value set in advance, and measurement result output means 18e for continuing the transmission and reception in a case where a fluctuation range with respect to the previous output level exceeds the error tolerance level, and outputting a test result in a case where the fluctuation range with respect to the previous output level is in a range of the error tolerance level.
Abstract: Provided are a spread spectrum clock generator and a spread spectrum clock generation method, a pulse pattern generator and a pulse pattern generation method, and an error rate measuring device and an error rate measuring method capable of performing SSC modulation of any frequency shift according to a standard. Included are a reference signal generator 10 that generates a reference signal, a modulation waveform generator 20 that generates a modulation waveform, a modulation unit 30 that frequency-modulates the reference signal with the modulation waveform to generate an SSC modulated signal, and a modulation control unit 42a capable of arbitrarily controlling the frequency shift of the modulation waveform and a slope of the frequency shift in any time section.
Abstract: A mobile terminal measurement system 1 tests a mobile terminal 30 corresponding to LTE and NR while controlling an LTE measurement device 10 and an NR measurement device 20 with a control device 50. The control device 50 includes an LTE operation display screen 70 for inputting a test setting value in the LTE measurement device 10, on which a test result corresponding to LTE is displayed, and an NR operation display screen 80 for inputting a test setting value in the NR measurement device 20, on which a test result corresponding to NR is displayed. The control device 50 displays communication management information (UE Capability Information) transmitted from the mobile terminal 30 to the LTE measurement device 10, on the LTE operation display screen 70 and the NR operation display screen 80.