Title :
Diversity performance of Ricean MIMO channels
Author :
Nabar, Rohir U. ; Bolcskei, Helmut ; Paulraj, Arogyaswami J.
Author_Institution :
Commun. Technol. Lab., Swiss Fed. Inst. of Technol., Zurich
Abstract :
In this paper, we assess the impact of real-world propagation conditions on the maximum achievable diversity performance of communication over MIMO channels. This is done by studying the outage behavior of the single-input single-output (SISO) channel induced by the use of orthogonal space-time block codes (OSTBCs). For Ricean fading MIMO channels we demonstrate the existence of an SNR-dependent critical rate, Rcrit, below which signaling with zero outage is possible and hence the fading channel behaves like an AWGN channel. For SISO channels, Rcrit is always zero. In the MIMO case, Rcrit is a simple function of the angle between the vectorized Ricean component of the channel and the subspace spanned by the vectorized Rayleigh fading component
Keywords :
AWGN channels; MIMO systems; Rayleigh channels; Rician channels; block codes; channel coding; diversity reception; space-time codes; AWGN channel; MIMO channel; OSTBC; Rayleigh component; Ricean fading MIMO channel; SISO; additive white Gaussian noise channels; diversity performance; orthogonal space-time block code; single-input single-output channel; AWGN; Block codes; Diversity methods; Diversity reception; Fading; Laboratories; MIMO; Rayleigh channels; Transmitters; Transmitting antennas;
Conference_Titel :
Smart Antennas, 2004. ITG Workshop on
Conference_Location :
Munich
Print_ISBN :
0-7803-8327-3
DOI :
10.1109/WSA.2004.1407677