Patent ID: 7769092

Claim:
An ultra wideband radio transmitter comprising: a delay time controller for generating a periodic pulse, inputting the periodic pulse to a first matched filter, outputting the periodic pulse to a second matched filter when transmission data has a first level out of 2 logical levels, outputting the periodic pulse to a third matched filter when the transmission data has a second level out of the 2 logical levels; the first matched filter for outputting a reference signal that becomes a data decision criterion when the periodic pulse is input thereto; the second matched filter for outputting a first data signal a predetermined time ahead of the reference signal when the periodic pulse is input thereto; the third matched filter for outputting a second data signal a predetermined time behind the reference signal when the periodic pulse is input thereto; an adder for adding up outputs of the first to third matched filters; a local oscillator for outputting a local signal for frequency-converting an addition signal of the adder at a high frequency band or a low frequency band; a mixer for receiving the addition signal and the local signal, and frequency-converting the addition signal; and an antenna for receiving the frequency-converted addition signal and radiating the frequency-converted addition signal in the air.