Analysis of higher-order N-tone sigma-delta modulators for ultra wideband communications

Kai Chuan Chang, Gerald E Sobelman, Ebrahim Saberinia, Ahmed H. Tewfik

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


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 languageEnglish (US)
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - Sep 6 2004
Event2004 IEEE International Symposium on Cirquits and Systems - Proceedings - Vancouver, BC, Canada
Duration: May 23 2004May 26 2004


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