Abstract: A receiving device includes a reception unit that samples a sample signal from a DUT 2; an FFT processing unit 21 that performs an FFT process by multiplying the sample signal by a window function; an FFT length setting unit 34 that, 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 unit 35 that, 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.

Abstract: A radio terminal test apparatus that tests radio communication performance of a radio terminal, the apparatus including: a radio signal processing unit that performs measurement processing on a radio signal transmitted from the radio terminal and acquires measurement data; a communication control unit that transmits and receives data to and from the radio signal processing unit; and a bus that connects the radio signal processing unit and the communication control unit. The radio signal processing unit includes a division determination unit that determines necessity of division of the measurement data, and, when the division determination unit determines that the measurement data needs to be divided, the measurement data is divided, and divided pieces of the measurement data are division-transmitted a plurality of times from the radio signal processing unit to the communication control unit via the bus.

Abstract: A receiving device includes a reception unit 10 that samples a signal to be measured a transmitted from a DUT 2 and acquires a sample signal d; an FFT processing unit 21 that performs an FFT process by multiplying the sample signal; a signal length calculation unit 31 that calculates a signal length of the signal to be measured from the sample signal; a comparing unit 33 that 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 unit 34 that, 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.

Abstract: A signal analysis apparatus includes a first frequency conversion unit 10 that generates an intermediate frequency signal SIF2 and a second spurious signal SSP2 from a measured signal SRF of a frequency fRF (center frequency fc), and a second frequency conversion unit 25 that converts the intermediate frequency signal SIF2 and the second spurious signal SSP2 into an intermediate frequency signal SIF2? of a frequency fIF2? and a second spurious signal SSP2? of a frequency fSP2? by performing frequency shift of the intermediate frequency signal SIF2 and the second spurious signal SSP2 by a frequency shift amount ?f, in which the frequency shift amount ?f is a value that does not establish a relationship of ?W/2?fSP2??fIF2??+W/2.

Abstract: A receiving device includes a reception unit that samples a sample signal from a DUT 2; an FFT processing unit 21 that performs an FFT process by multiplying the sample signal by a window function; an FFT length setting unit 34 that, 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 unit 35 that, 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.

Abstract: A receiving device includes a reception unit 10 that samples a signal to be measured a transmitted from a DUT 2 and acquires a sample signal d; an FFT processing unit 21 that performs an FFT process by multiplying the sample signal; a signal length calculation unit 31 that calculates a signal length of the signal to be measured from the sample signal; a comparing unit 33 that 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 unit 34 that, 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.

Abstract: A signal analysis apparatus includes a first frequency conversion unit 10 that generates an intermediate frequency signal SIF2 and a second spurious signal SSP2 from a measured signal SRF of a frequency fRF (center frequency fc), and a second frequency conversion unit 25 that converts the intermediate frequency signal SIF2 and the second spurious signal SSP2 into an intermediate frequency signal SIF2? of a frequency fIF2? and a second spurious signal SSP2? of a frequency fSP2? by performing frequency shift of the intermediate frequency signal SIF2 and the second spurious signal SSP2 by a frequency shift amount ?f, in which the frequency shift amount ?f is a value that does not establish a relationship of ?W/2?fSP2??fIF2??+W/2.