DocumentCode :
3510613
Title :
Tap-partitioned Kalman and LMS chip-level equalization for a DS-CDMA receiver
Author :
Seo, Dong-Wook ; Seo, Jong-Soo
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
fYear :
2006
fDate :
16-18 Jan. 2006
Abstract :
We present a chip-level equalization technique for a DS-CDMA forward link receiver. The proposed equalization algorithm estimates the dominant taps of equalizer, and then partitions the equalizer tap into a Kalman partition and LMS partition according to the dominant power criteria. The tap positions assigned as the Kalman partition are updated using the reduced-complexity Kalman filtering adaptive algorithm, and the tap positions assigned as the LMS partition are updated using the LMS adaptive algorithm. The proposed tap-partitioned, chip-level equalizer exhibits fast convergence speed and is less complex than the conventional Kalman filtering-based equalization algorithm. In addition, while the performance of the conventional reduced-rank chip-equalizer degraded significantly when the tap selection was not optimal, that of the proposed algorithm is robust even when the tap partitioning is not ideal.
Keywords :
Kalman filters; adaptive equalisers; code division multiple access; filtering theory; least mean squares methods; radio links; radio receivers; spread spectrum communication; DS-CDMA receiver; LMS chip-level equalization; adaptive algorithm; dominant power criteria; forward link receiver; reduced-complexity Kalman filtering; tap-partitioned Kalman; Adaptive algorithm; Adaptive filters; Convergence; Degradation; Equalizers; Filtering algorithms; Kalman filters; Least squares approximation; Multiaccess communication; Partitioning algorithms; CDMA receiver; Kalman filtering; chip-level equalizer; multiple access interference;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Pervasive Computing, 2006 1st International Symposium on
Print_ISBN :
0-7803-9410-0
Type :
conf
DOI :
10.1109/ISWPC.2006.1613646
Filename :
1613646
Link To Document :
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