Anritsu Corporation

Atsuki Morita

Daisuke Nakagawa

Takumi Nakamura

Daiki Kano

Nobuaki Shimakawa

Masahiro Arayama

Mark Joseph Aquino Isip

There is provided a mobile terminal test apparatus capable of easily assigning and setting a frequency of each CC in the same frequency band of carrier aggregation. An operation unitthat accepts an operation input from a user, a display unitthat displays an image, and a control unitthat sets a contiguousness relationship of the plurality of component carriers and sets a predetermined premise parameter of the component carrier, and then automatically sets the parameter of the component carrier defined by a predetermined communication standard, by designating a type of the contiguousness relationship and a predetermined designation parameter are included.

Mobile terminal test apparatus and parameter setting method thereof

To provide a mobile terminal test device capable of performing a test with high efficiency by automatically setting a Band filter. A mobile terminal test device includes a simulated base station unitthat performs 5G NR communication with a mobile terminalin accordance with the 5G NR standard, a scenario processing unitthat reads a stored scenario and causes the simulated base station unitto transmit notification information or execute a communication sequence with the mobile terminal, based on the scenario, and a control unitthat, when being connected to the mobile terminal, sets, as a Band filter, a band set as a communicable frequency band and transmits the set band to the mobile terminal

Mobile terminal test device and band filter setting method thereof

Included are a demodulation unitthat demodulates a received OFDM modulation signal to acquire a demodulated constellation signal, an ideal constellation signal generation unitthat generates an ideal constellation signal from the demodulated constellation signal, a data extraction unitthat extracts signal data included in some symbol sections including a known reference symbol, among all symbol sections, from the demodulated constellation signal and the ideal constellation signal, a phase error calculation unitthat calculates the phase error of the demodulated constellation signal for the ideal constellation signal, with respect to the extracted signal data, a phase error characteristics estimation unitthat estimates the frequency characteristics of the phase error, and a phase error correction unitthat corrects the phase error of the demodulated constellation signal, based on the frequency characteristics of the phase error.

Receiving device

Included are a demodulation unit that demodulates a received OFDM modulation signal to acquire a demodulated constellation signal, an ideal constellation signal generation unit that generates an ideal constellation signal from the demodulated constellation signal, a data extraction unit that extracts signal data corresponding to subcarriers included in a part of an intermediate frequency section among all frequency sections, from the demodulated constellation signal and the ideal constellation signal, a phase error calculation unit that calculates the phase error of the demodulated constellation signal for the ideal constellation signal, with respect to the extracted signal data, a phase error characteristic estimation unit that estimates the frequency characteristic of the phase error, and a phase error correction unit that corrects the phase error of the demodulated constellation signal, based on the frequency characteristic of the phase error.

Receiving device and receiving method, and mobile terminal test apparatus provided with receiving device

A receiving deviceincludes a reception unita delay signal generation unita difference calculation unitthat calculates a phase difference between the received signal and the delay signal, a variance calculation unitthat 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 unitthat 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 unitthat generates a synchronization timing signal, based on information on the position of the symbol on the time axis.

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Kanagawa, Japan

Atsuki Morita