Title :
A novel fast joint detector for smart antenna based CDMA systems
Author :
Yang, Weidong ; Liu, Hui ; Xu, Guanghan ; Kim, Sang-Youb
Abstract :
The minimum mean squared error (MMSE) detectors have been widely explored in previous work for CDMA communications. In this paper, we discuss several algorithms for MMSE detection of block CDMA signals with spatial and temporal diversities. The emphasis is on the cyclic reduction algorithm for MMSE detection, in which the number of matrix inversions and matrix multiplications is bounded by O(log/sub 2/(L/d)d/sup 3/) in contrast with O(L(d+1)/sup 2/) of the Cholesky decomposition based algorithm, where L is number of symbols per user for one burst and (d+1) is the length of signature waveforms counted by symbol duration.
Keywords :
adaptive antenna arrays; code division multiple access; diversity reception; least mean squares methods; matrix inversion; matrix multiplication; radio receivers; receiving antennas; signal detection; spread spectrum communication; MMSE detectors; cyclic reduction algorithm; fast joint detector; matrix inversion; matrix multiplication; minimum mean squared error detectors; smart antenna based CDMA systems; spatial diversity; temporal diversity; Decorrelation; Detectors; Equations; Matrix decomposition; Multiaccess communication; Receiving antennas; Wireless communication;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.832314
