TY - GEN
T1 - Efficient adaptive blind MAI suppression in DS/CDMA by embedded constraint parallel projection techniques
AU - Yukawa, Masahiro
AU - Cavalcante, Renato L.G.
AU - Yamada, Isao
PY - 2005/1/1
Y1 - 2005/1/1
N2 - This paper presents two novel blind set-theoretic adaptive filtering algorithms for Multiple Access Interference (MAI) suppression in DS/CDMA systems. We naturally formulate the problem of MAI suppression as minimizing asymptotically a sequence of cost functions under some linear constraint defined by desired user's signature. The proposed algorithms embed the constraint in the direction of adaptation, and thus the adaptive filter moves toward the optimal filter without stepping away from the constraint set. In addition, using parallel processors, the proposed algorithms attain good performance behavior with low computational complexity. Geometric interpretation clarifies an advantage of the proposed methods over some conventional methods. Simulation results demonstrate that the proposed algorithms achieve much faster convergence than the conventional methods with a moderate number of concurrent processors.
AB - This paper presents two novel blind set-theoretic adaptive filtering algorithms for Multiple Access Interference (MAI) suppression in DS/CDMA systems. We naturally formulate the problem of MAI suppression as minimizing asymptotically a sequence of cost functions under some linear constraint defined by desired user's signature. The proposed algorithms embed the constraint in the direction of adaptation, and thus the adaptive filter moves toward the optimal filter without stepping away from the constraint set. In addition, using parallel processors, the proposed algorithms attain good performance behavior with low computational complexity. Geometric interpretation clarifies an advantage of the proposed methods over some conventional methods. Simulation results demonstrate that the proposed algorithms achieve much faster convergence than the conventional methods with a moderate number of concurrent processors.
UR - http://www.scopus.com/inward/record.url?scp=26044468933&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=26044468933&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2005.1415863
DO - 10.1109/ICASSP.2005.1415863
M3 - Conference contribution
AN - SCOPUS:26044468933
SN - 0780388747
SN - 9780780388741
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - III929-III932
BT - 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing,ICASSP '05 - Proceedings - Audio and ElectroacousticsSignal Processing for Communication
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05
Y2 - 18 March 2005 through 23 March 2005
ER -