Title :
Rake-Based Multiuser Detection for Quasi-Synchronous SDMA Systems
Author :
Ma, Shaodan ; Zeng, Yonghong ; Ng, Tung-Sang
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ.
fDate :
3/1/2007 12:00:00 AM
Abstract :
In this letter, a Rake-based multiuser detection technique, consisting of multiuser single-path signal separation, time-delay estimation, and multipath combining, is proposed for quasi-synchronous spatial-division multiple-access (SDMA) systems. Time diversity is achieved for performance improvement. In addition, only the upper bounds of the channel length and the time delays are required. Simulation results verify the effectiveness of the proposed technique, as well as its robustness against overestimation of the maximum channel length and the maximum time delay
Keywords :
delay estimation; multiuser detection; radio receivers; source separation; space division multiple access; Rake-based multiuser detection; multipath combining; multiuser single-path signal separation; quasi-synchronous SDMA systems; spatial-division multiple-access systems; time-delay estimation; Delay effects; Delay estimation; Fading; Intersymbol interference; Multiaccess communication; Multipath channels; Multiuser detection; Receiving antennas; Robustness; Upper bound; Multiuser detection; Rake receiver; spatial- division multiple access (SDMA);
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2007.892440
