Multi-access Interference Cancellation Receiver for Time-Hopping Ultra Wideband Communication
Wireless Personal Communications: An International Journal
Multiuser channel estimation for ultra-wideband systems using up to the second-order statistics
EURASIP Journal on Applied Signal Processing
A subspace approach to blind multiuser detection for ultra-wideband communication systems
EURASIP Journal on Applied Signal Processing
EURASIP Journal on Advances in Signal Processing
ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
A novel high data rate prerake UWB system using orthogonal codes and chip-interleaving
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
International Journal of Communication Systems
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Transmitting digital information using ultra-short pulses, impulse radio (IR) has received increasing interest for multiple access (MA). When IRMA systems have to operate in dense multipath environments, the multiple user interference (MUI) and intersymbol interference (ISI) induced, adversely affect system capacity and performance. Analog IRMA utilizes pulse position modulation (PPM) and random time-hopping codes to mitigate ISI and suppress MUI statistically. We develop an all-digital IRMA scheme that relies on multistage block-spreading (MS-BS), and judiciously designed transceiver pairs to eliminate MUI deterministically, and regardless of ISI multipath effects. Our proposed MS-BS-IRMA system can accommodate a large number of users and is capable of providing different users with variable transmission rates, which is important for multimedia applications. Unlike conventional IRMA systems, MS-BS-IRMA exhibits no degradation in bit-error rate performance, as the number of users increases.