Ultra-Wideband Technology (UWB) EE 206A Spring, 2002 Robert Tseng Jacob Kuo Objectives Introduction What is UWB Why it is attractive Who Basic Model Transmitter Model Receiver Model Performance BER Pro’s and Con’s Industry Advocators Industry Contesters Conclusion Introduction What is UWB? A series of very short baseband pulses with time duration in nano-seconds that exist on ALL frequencies simultaneously, like a blast of electrical Noise. Synonyms: munication Technology Impulse Radio Baseband Pulse Technology Why is UWB attractive? Capacity: a channel is linearly proportional to its bandwidth. UWB can go up to 2 Giga-Hz in bandwidth. Spread spectrum: transmission in which the data sequence occupies a bandwidth in excess of the minimum bandwidth necessary to send it. It uses only several frequencies, one at a time. essor to spread spectrum: UWB uses every frequency there is, use them all at same time. Simplicity: it’s essentially a base-band system (Carrier free), for which the analog front-plexity is far less than that for a traditional sinusoidal radio. (See Figures at next page.) Traditional Sinusoidal Radio UWB: Impulse Radio When was UWB invented and by whom? Tough question, but easy answer! There have been many claims to the honor; however, Dr. Gerald F. Ross, currently President of ANRO Engineering, Inc., first demonstrated the feasibility of utilizing UWB waveforms for radar munications applications back in the late 1960’s and early 1970’s. Gerry’s pioneering insight into the value and applications of this technology over 30 years ago has been instrumental in shaping UWB technology to the point it has reached today – with applications ready to meet market demands for high-speed wireless and precision radar/positioning applications. Gerry was recognized by the National Academy of Engineering for his efforts in ultra wideband technology, and elected a Member in 1995. Basic Transmitter Model Transmitter Model with typical time hopping format
