Anritsu Corporation

Mayfor Dangkiw

Kenji Goto

Takasumi Ikebe

Hirofumi Ono

Ryo Inomata

Hirofumi Kanno

A receiving device includes a reception unit that samples a sample signal from a DUT; an FFT processing unitthat performs an FFT process by multiplying the sample signal by a window function; an FFT length setting unitthat, when the signal length of the signal to be measured is shorter than the first FFT length conforming to the communication standard, instead of the first FFT length, sets a second FFT length shorter than the signal length of the signal to be measured, as an FFT length of the FFT process; and a window function setting unitthat, when the signal length of the signal to be measured is shorter than the first FFT length, instead of a first window function, sets an asymmetric second window function having a peak separated from a center of a window section, as the window function.

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

A receiving device includes a reception unitthat samples a signal to be measured a transmitted from a DUTand acquires a sample signal d; an FFT processing unitthat performs an FFT process by multiplying the sample signal; a signal length calculation unitthat calculates a signal length of the signal to be measured from the sample signal; a comparing unitthat compares the calculated signal length of the signal to be measured with a first FFT length conforming to a communication standard; and an FFT length setting unitthat, when as a result of the comparison by the comparing unit, the signal length is shorter than the first FFT length, sets a second FFT length shorter than the signal length of the signal to be measured, as the FFT length of the FFT process by the FFT processing unit.

According to the present disclosure, there is provided a signal generation apparatus including: a base band module (); a DA converter that converts digital base band signals into modulation signals corresponding to a plurality of cells; an RF converter () to which the modulation signals corresponding to the plurality of cells are input, and which outputs an RF signal obtained by frequency-converting the modulation signal; and an RF converter control unit (), in which the RF converter control unit controls the base band module to reduce a power value of a digital base band signal corresponding to a predetermined cell, among the digital base band signals corresponding to the plurality of cells in the base band module so that an input level of the modulation signal input to the RF converter is equal to or lower than an input limit value of the RF converter.

Signal generation apparatus and signal generation method

A signal analysis apparatus includes a first frequency conversion unitthat generates an intermediate frequency signal Sand a second spurious signal Sfrom a measured signal Sof a frequency f(center frequency f), and a second frequency conversion unitthat converts the intermediate frequency signal Sand the second spurious signal Sinto an intermediate frequency signal S' of a frequency f&#x2032; and a second spurious signal S&#x2032; of a frequency f&#x2032; by performing frequency shift of the intermediate frequency signal Sand the second spurious signal Sby a frequency shift amount &#x394;f, in which the frequency shift amount &#x394;f is a value that does not establish a relationship of &#x2212;W/2&#x2264;f&#x2032;&#x2212;f&#x2032;&#x2264;+W/2.

Signal analysis apparatus and signal analysis method

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 () that converts a digital base band signal for testing into an intermediate frequency (IF) signal and outputs the IF signal, and a control unit (), in which the RF base module is connected to an RF converter () 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.

Growing community of inventors

Kanagawa, Japan

Mayfor Dangkiw