Impact of Sampling Jitter on Mostly-Digital Architectures for UWB Bio-Medical Applications

Abstract— Ultra-wideband (UWB) impulse radio is a promising technique for low-power bio-medical communication systems. While a range of analog and digital UWB architectures exist, the mostly-digital approach without analog down-conversion enables better technology scaling and signal processing flexibility. Furthermore, recently proposed sub-sampling schemes and advances in high-speed ADC circuit design are helping to make this approach more feasible at low power. However, architectures that directly sample the received signal are more vulnerable to sampling jitter. Currently, there does not exist a model describing the impact of sampling jitter making it difficult to determine appropriate tolerances or to establish the feasibility of digital architectures. To address this problem, we have developed a model of sampling jitter and derived a generic bit error rate expressions for a digital UWB modem with sampling jitter, additive noise, and imperfect channel estimation in a generic mu...

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Andrew Fort, Mike Chen, Robert W. Brodersen, Claude Desset, Piet Wambacq, Leo Van Biesen
• Keywords: Communications, Digital Uwb, Digital Uwb Architectures, Digital Uwb Modem, ICC 2007