TY - GEN
T1 - Spreading codes enabling warp converging Wiener filters for multiuser detection in CDMA systems
AU - Wang, Xiaoli
AU - Ge, Hongya
PY - 2008/9/12
Y1 - 2008/9/12
N2 - It has been shown in our previous work [1][2] that for signal modes with a specially structured data covariance matrix, a warp (stable and predictable early) convergence can be achieved using the reduced-rank conjugate gradient (RRCG) Wiener filter (WF) for multiuser detection (MUD) in code division multiple access (CDMA) communication systems. In this work, we study various commonly used spreading codes that enable warp converging of the RRCG-WF. By analyzing the eigen-structure of the code set Grammian, we provide the exact number of convergence steps for different code sets. It turns out that this number varies from 1 to 4 based on different spreading sequences, implying greatly reduced computational complexity of the RRCG-WF for MUD in CDMA systems.
AB - It has been shown in our previous work [1][2] that for signal modes with a specially structured data covariance matrix, a warp (stable and predictable early) convergence can be achieved using the reduced-rank conjugate gradient (RRCG) Wiener filter (WF) for multiuser detection (MUD) in code division multiple access (CDMA) communication systems. In this work, we study various commonly used spreading codes that enable warp converging of the RRCG-WF. By analyzing the eigen-structure of the code set Grammian, we provide the exact number of convergence steps for different code sets. It turns out that this number varies from 1 to 4 based on different spreading sequences, implying greatly reduced computational complexity of the RRCG-WF for MUD in CDMA systems.
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U2 - 10.1109/ICC.2008.170
DO - 10.1109/ICC.2008.170
M3 - Conference contribution
AN - SCOPUS:51249121117
SN - 9781424420742
T3 - IEEE International Conference on Communications
SP - 866
EP - 870
BT - ICC 2008 - IEEE International Conference on Communications, Proceedings
T2 - IEEE International Conference on Communications, ICC 2008
Y2 - 19 May 2008 through 23 May 2008
ER -