Title :
Adaptive detection using widely linear processing with data reusing for DS-CDMA systems
Author :
De Lima, Amaro A. ; De Lamare, Rodrigo C.
Author_Institution :
Fed. Univ. of Rio de Janeiro, Rio de Janeiro
Abstract :
In this work we propose widely linear (WL) processing data-reusing algorithms for interference suppression in direct-sequence code division multiple access (DS-CDMA) systems. Based on the widely linear estimation approach, we derive low complexity affine-projection algorithms for estimating the coefficients of adaptive linear multiuser receivers. Adaptation step normalization approaches are described for the WL type algorithms and comparison against their linear versions are carried out. Simulation experiments show that the proposed techniques outperform previously reported algorithms for several scenarios.
Keywords :
adaptive estimation; adaptive signal detection; code division multiple access; interference suppression; least mean squares methods; multiuser detection; DS-CDMA system; adaptation step normalization detection; adaptive linear multiuser receivers; affine-projection algorithm; direct-sequence code division multiple access; interference suppression; least mean-square method; widely linear estimation approach; widely linear processing data-reusing algorithm; Adaptive filters; Interference suppression; Least squares approximation; Multiaccess communication; Multiple access interference; Multiuser detection; Narrowband; Signal processing; Signal processing algorithms; Wireless networks; Affine projection; LMS; Multi-user detection; Widely linear processing;
Conference_Titel :
Telecommunications Symposium, 2006 International
Conference_Location :
Fortaleza, Ceara
Print_ISBN :
978-85-89748-04-9
Electronic_ISBN :
978-85-89748-04-9
DOI :
10.1109/ITS.2006.4433267
