Title :
Simple space-time coded SS-CDMA systems capable of perfect MUI/ISI elimination
Author :
Barbarossa, Sergio ; Cerquetti, Francesca
Author_Institution :
Inf. & Commun. Dept., Rome Univ., Italy
Abstract :
In this letter we propose a very simple strategy for combining space-time block coding (STBC) with code division multiple access (CDMA) to be used in single-user links or in broadcasting over time-dispersive channels. The proposed system provides the desired space diversity gain and is capable of perfect cancellation of multiuser interference (MUI) and intersymbol interference (ISI), using a very simple receiver structure. The advantage is obtained by simply incorporating cyclic prefixes in the user codes. We provide a theoretical analysis, verified via simulation results, and a comparison between CDMA and OFDMA systems incorporating STBC.
Keywords :
block codes; broadcast channels; code division multiple access; dispersive channels; diversity reception; interference suppression; intersymbol interference; radio receivers; radiofrequency interference; spread spectrum communication; time-varying channels; ISI; STBC; broadcasting; code division multiple access; combining space-time block coding; cyclic prefixes; intersymbol interference; multiuser interference; perfect MUI/ISI elimination; perfect cancellation; receiver structure; simple space-time coded SS-CDMA systems; single-user links; space diversity gain; time-dispersive channels; user codes; Block codes; Broadcasting; Dispersion; Diversity methods; Fading; Intersymbol interference; Multiaccess communication; Multiuser detection; OFDM; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.974489
