Digital transmission theory
Multiuser Detection
Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor Networks
WMCSA '02 Proceedings of the Fourth IEEE Workshop on Mobile Computing Systems and Applications
Link Performance of an Ultra Wide Bandwidth Wireless In-Home Network
ISCC '02 Proceedings of the Seventh International Symposium on Computers and Communications (ISCC'02)
A joint PHY/MAC cross-layer design for UWB under power control
Computers and Electrical Engineering
Quasi-orthogonal space-time-frequency codes in MB-OFDM UWB
Computers and Electrical Engineering
A Statistical Model for Indoor Multipath Propagation
IEEE Journal on Selected Areas in Communications
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This study investigates the effect of multiple sources using STS across a Time-Hopping-PPM Modulation that is over an UWB Saleh-Valenzuela channel with each source using two transmit antennas. We model and analyze this system, showing that the presence of such MAI results in a significant degradation in BER performance. Simulation results show that for strong signal strength of interfering MAI signals degradation in BER performance is observed for the cases where we have five and 10 distinct MAI sources present when using Walsh-Hadamard thirty two chip spreading sequences. Using simulation, we investigate the use of other sets of orthogonal spreading sequences with improved cross correlation properties and find that for some sequences a significant improvement is seen compared to Walsh-Hadamard sequences when they are similarly misaligned. We show that MAI degrades the BER performance of such systems and that selection of improved cross correlation spreading code sequence sets improves BER.