Abstract
We consider the properties of a class of non-oversampling N-tone sigma-delta modulators which have applications in the design of UWB-OFDM communications systems. The spectrum gaps that exist in such systems are well-matched to the noise shaping properties of these modulators and their non-oversampling nature makes them practical for use with these ultra wideband signals. Performance results for first-order, second-order and L th-order modulators are presented, and a general expression for the excess resolution that can be gained in such systems is obtained.
Original language | English (US) |
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Journal | Proceedings - IEEE International Symposium on Circuits and Systems |
Volume | 4 |
State | Published - Sep 6 2004 |
Event | 2004 IEEE International Symposium on Cirquits and Systems - Proceedings - Vancouver, BC, Canada Duration: May 23 2004 → May 26 2004 |