Title :
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
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;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851700
