RT Conference Proceedings
T1 Harmony search heuristics for quasi-asynchronous CDMA detection with M-PAM signalling
A1 Gil-Lopez, S.
A1 Del Ser, J.
A1 Garcia-Padrones, L.
AB Focusing on CDMA (Code Division Multiple Access) uplink communications, this paper addresses the application of heuristic techniques to the multiple user detection problem when dealing with asynchrony between transmitters and bandwidth-limited PAM (Pulse AmplitudeModulation) signals. In such systems it is known that, even for the simplest case of binary modulated signals with perfectly synchronous transmitters, simple Single-User Detection (SUD) techniques (e.g. Rake receiver) are outperformed by Multiple-User Detection (MUD) schemes (based on the Maximum-Likelihood - ML - criteria), at a computational cost exponentially increasing with the number of users. Consequently, Genetic Algorithms (GA) have been extensively studied during the last decade as a means to alleviate the computational complexity of CDMA MUD detectors while incurring, at the same time, in a negligible error rate penalty. In this manuscript, a novel heuristic approach inspired in the recent Harmony Search algorithm will be shown to provide a faster convergence and a better error rate performance than conventional GA's in presence of inter-user asynchrony in bandwidth-limited CDMA communications, specially when the complexity of the scenario increases.
SN 3642166431
SN 9783642166433
SN 1867-8211
YR 2010
FD 2010
LK https://hdl.handle.net/11556/2297
UL https://hdl.handle.net/11556/2297
LA eng
NO Gil-Lopez , S , Del Ser , J & Garcia-Padrones , L 2010 , Harmony search heuristics for quasi-asynchronous CDMA detection with M-PAM signalling . in Mobile Lightweight Wireless Systems - Second International ICST Conference, MOBILIGHT 2010, Revised Selected Papers . Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering , vol. 45 LNICST , pp. 626-637 , 2nd International ICST Conference on Mobile Lightweight Wireless Systems, MOBILIGHT 2010 , Barcelona , Spain , 10/05/10 . https://doi.org/10.1007/978-3-642-16644-0_54
NO conference
DS TECNALIA Publications
RD 28 jul 2024