Anritsu Corporation

Takasumi Ikebe

Mayfor Dangkiw

Kenji Goto

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.

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.

Growing community of inventors

Kanagawa, Japan

Takasumi Ikebe