Ntt Docomo, Inc.

Tetsurou Imai

Yoshihiro Ishikawa

Koushirou Kitao

A receiving apparatus for receiving a downlink signal in which pilot symbols are mapped discontinuously, includes: a unit configured to extract reference signals from the downlink signal that is Fourier transformed by a Fourier transform unit; a unit configured to generate a first signal having a first window size by arranging the extracted reference signals on the frequency axis and by performing inverse Fourier transform on the reference signals; a unit configured to divide the first signal into a plurality of signals to extract a signal included in a second window; a unit configured to generate a second signal that includes the signal included in the second window and that has a window size similar to the first window size; a Fourier transform unit configured to generate a third signal from the second signal; and a unit configured to calculate received power based on the third signal.

Receiving apparatus and receiving method

A reception device calculates a radio quality in a downlink by using a plurality of pilot symbols transmitted from a base station. The reception device includes a correlation calculation unit and a radio quality calculation unit. The correlation calculation unit calculates a correlation value between a first pilot symbol and a second pilot symbol on a time axis or a correlation value there between on a frequency axis. If the correlation value obtained by the correlation calculation unit exceeds a predetermined threshold value, the radio quality calculation unit calculates a radio quality in the downlink by using a reception quality of the first pilot symbol and a reception quality of the second pilot symbol.

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Yokosuka, Japan

Tetsurou Imai