A novel adaptive algorithm for MMSE multiuser detection

Author

Wang, R. ; Wang, Xiaojie ; Han, Cunwu ; Wu, Weiling

Author_Institution

Dept. of Inf. Eng., Beijing Univ. of Posts & Telecommun., China

Volume

3

fYear

2000

fDate

2000

Firstpage

2389

Abstract

A novel adaptive algorithm for MMSE multiuser detection in downlink CDMA is proposed. This algorithm uses the information in pilot channel to compute the desired MMSE solution. Computation for the solution consists of two steps: (a) computing the solution for the user in pilot channel, (b) then computing directly the desired solution using the results in (a). Hence, compared to other previously proposed algorithms, this algorithm does not require training sequences or channel estimation. Moreover, it is proved in this paper that the MMSE detector using the algorithm can converge to the Wiener solution globally. Computational complexity of the proposed algorithm is O(N²)

Keywords

adaptive signal detection; cellular radio; code division multiple access; computational complexity; convergence of numerical methods; least mean squares methods; multipath channels; multiuser channels; radio links; spread spectrum communication; DS-SS signaling; MMSE multiuser detection; Wiener solution; adaptive algorithm; algorithm convergence; cellular telecommunications; code-division multiple-access; computational complexity; demodulation; direct-sequence spread-spectrum; downlink CDMA; multipath channel; multiple access interference; pilot channel information; Adaptive algorithm; Channel estimation; Demodulation; Detectors; Downlink; Multiaccess communication; Multiuser detection; Parameter estimation; RAKE receivers; Telecommunication computing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851700

Filename

851700