| 摘要 |
<p>A reception device, reception method, and computer program for receiving a signal that includes a frequency-domain channel estimation value comprising N (where N is a power of 2) items of data, and obtaining a time-domain channel estimation value by performing P (where P is equal to log 2 N) discrete Fourier transform (DFT) computations on the frequency-domain channel estimation value, wherein the amount of computation is reduced. An M th (where M is equal to 2 to P) DFT computation, at which DFT computation is to be started from amongst the P DFT computations, is determined from the number of items of data that could not be substituted with 0 from amongst the N items of data constituting the frequency-domain channel estimation value obtained from the received signal; a rotator is generated for computing data to be inputted into the M th DFT computation that has been determined; data to be inputted into the M th DFT computation is calculated from the generated rotator and the frequency-domain channel estimation value obtained from the received signal; and the M th to P th DFT computations are performed, whereby the time-domain channel estimation value is computed.</p> |
