Title :
Joint Design of a DS-UWB Modulator and Chaos-Based Spreading Sequences for Sensor Networks
Author :
De Michele, Luca Antonio ; Cimatti, Giampaolo ; Rovatti, Riccardo ; Setti, Gianluca
Author_Institution :
ARCES, Bologna Univ.
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%.
Keywords :
modulators; receiving antennas; spread spectrum communication; transmitting antennas; ultra wideband technology; wireless sensor networks; 1.2 V; CMOS UMC130; chaos-based sequence generation; chaos-based spreading sequences; direct sequence ultra wideband modulator; multiple access interference; receiver antennas; schematic design; signal-to-interference ratio; transmitter antennas; wireless-sensor-networks; Antenna measurements; CMOS technology; Chaos; Multiple access interference; Pulse measurements; Receiving antennas; Transmitters; Transmitting antennas; Ultra wideband antennas; Wireless sensor networks;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378573
