ABSTRACT
Applications .......................................................................................................................... 97 3.9 Design of Short-Range UWB Radar for Practical Applications .................................. 100
3.9.1 UWB Radar for 24-h Measurement of Patients’ Heart and Respiration Rates ................................................................................ 101 3.9.2 UWB Radar for Remote Human Physiological Measurements ...................... 102 3.9.3 UWB Radar for Through-Wall Detection of People .......................................... 102
3.10 Conclusions ......................................................................................................................... 102 Acknowledgments ...................................................................................................................... 103 References ..................................................................................................................................... 103
3.1.1 Narrowband and Ultrawideband Signals
The majority of conventional wireless systems have a bandwidth much smaller than their carrier frequency. These systems use a sinusoidal carrier signal and transmit information by changing their amplitude and frequency (or phase). The theory and practice of modern wireless systems are based on the well-developed body of theory of conventional wireless systems. Ultrawideband (UWB) radio and radar systems with spatially short nonsinusoidal waveforms present a new set of problems that conventional theory does not cover.
