A chaos-based sequence generation method for reducing multiple access interference (MAI) in direct sequence UWB wireless-sensor-networks (WSNs) is presented, along with the schematic design in CMOS UMC130 1.2V technology of a modulator scheme, that takes into account both the transmitter and receiver antennas. Chaos-based spreading is numerically optimized to combine with the pulse profile (as obtained by extensive simulations) and maximizing the bit-rate (BR) at which each user may transmit given a certain link quality, measured as the signal-to-interference ratio (SIR); when compared with traditional random sequences, the BR increase is up to 30%.
Joint Design of a DS-UWB Modulator and Chaos-Based Spreading Sequences for Sensor Networks / L. De Michele; G. cimatti; R. Rovatti; G. Setti. - STAMPA. - (2007), pp. 1441-1444. (Intervento presentato al convegno Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on tenutosi a New Orleans nel maggio 2007).
Joint Design of a DS-UWB Modulator and Chaos-Based Spreading Sequences for Sensor Networks
DE MICHELE, LUCA ANTONIO;CIMATTI, GIAMPAOLO;ROVATTI, RICCARDO;
2007
Abstract
A chaos-based sequence generation method for reducing multiple access interference (MAI) in direct sequence UWB wireless-sensor-networks (WSNs) is presented, along with the schematic design in CMOS UMC130 1.2V technology of a modulator scheme, that takes into account both the transmitter and receiver antennas. Chaos-based spreading is numerically optimized to combine with the pulse profile (as obtained by extensive simulations) and maximizing the bit-rate (BR) at which each user may transmit given a certain link quality, measured as the signal-to-interference ratio (SIR); when compared with traditional random sequences, the BR increase is up to 30%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
