| 摘要 |
It is aimed at performing an inverse FFT for ranging and efficiently estimating channel characteristics of a time response. It is highly possible that the UWB standardization adopts OFDM systems. A transmission estimation section inevitably acquires estimation values for a frequency region. The ranging is a representative feature of the UWB and requires channel estimation values for time response. For this reason, an inverse FFT needs to be performed for conversion. Frequency region smoothing means is used for time response limitation to prevent additional large FFTs from being provided for the ranging. It is therefore possible to acquire time responses using fewer FFT points than for ordinary data reception.
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