Ultrawideband Radio Transmitting Apparatus, Ultrawideband Radio Receiving Apparatus, And Ultrawideband Radio Transmitting-Receiving Apparatus

摘要

A digital data that includes at least two bits is input to a chirp modulation unit. On the basis of either one of these two bits, a frequency variable range is selected as either a frequency variable range between a frequency f1 and a frequency f2, a frequency variable range between a frequency f2 and a frequency f3 (the frequency f3 is the highest, the frequency f2 the second highest, and the frequency f1 the lowest of these three frequencies). On the basis of the other bit, it is selected whether a frequency is swept to a higher frequency or to a lower frequency within the frequency variable range selected by the one of the two bits.