TY - JOUR
T1 - Long-term krylov-prefilter for reduced-dimension receive processing in DS-CDMA systems
AU - Dietl, Guido
AU - Joham, Michael
AU - Utschik, Wolfgang
AU - Nossek, Josef A.
PY - 2002
Y1 - 2002
N2 - Currently, long-term channel properties are only used for reduced-dimension processing in eigen sub-spaces. In this paper, we introduce a prerake at the transmitter in the uplink of a Direct Sequence (DS) CDMA system with non-orthogonal codes in order to exploit long-term channel properties for reduced-dimension Wiener filtering in Krylov subspaces at the receiver. Simulation results show that Krylov outperforms eigen prefiltering with and without previous correlation. Moreover, long-term is better than or equal to short-term processing except for optimal filtering in Krylov subspaces assuming multipath environments.
AB - Currently, long-term channel properties are only used for reduced-dimension processing in eigen sub-spaces. In this paper, we introduce a prerake at the transmitter in the uplink of a Direct Sequence (DS) CDMA system with non-orthogonal codes in order to exploit long-term channel properties for reduced-dimension Wiener filtering in Krylov subspaces at the receiver. Simulation results show that Krylov outperforms eigen prefiltering with and without previous correlation. Moreover, long-term is better than or equal to short-term processing except for optimal filtering in Krylov subspaces assuming multipath environments.
KW - Adaptive filtering
KW - DS-CDMA
KW - Long-term channel properties
KW - Multi-stage nested wiener filter
KW - Non-orthogonal codes
KW - Reduced-rank equalization
KW - Space-time processing
KW - Wireless communications
UR - http://www.scopus.com/inward/record.url?scp=0036445572&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:0036445572
SN - 0740-0551
VL - 56
SP - 492
EP - 495
JO - IEEE Vehicular Technology Conference
JF - IEEE Vehicular Technology Conference
IS - 1
T2 - 56th Vehicular Technology Conference
Y2 - 24 September 2002 through 28 September 2002
ER -