Title :
On the Spectral Efficiency for Selection Combiner Diversity (SCD) over Slow Fading
Author :
Al-Qahtani, Fawaz S. ; Zummo, Salam A. ; Gurung, Arun K. ; Hussain, Zahir M.
Author_Institution :
Sch. of Electr. & Comput. Eng., RMIT Univ., Melbourne, VIC
Abstract :
In this paper we derive closed-form expressions for the single-user capacity of selection combining diversity (SCD) system, taking into account the effect of imperfect channel estimation at the receiver. The channel considered is a slowly varying spatially independent flat Rayleigh fading channel. The complex channel estimate and the actual channel are modelled as jointly Gaussian random variables with a correlation that depends on the estimation quality. Two adaptive transmission schemes are analyzed: 1) optimal power and rate adaptation; and 2) constant power with optimal rate adaptation. Our numerical results show the effect of Gaussian channel estimation error on the achievable spectral efficiency.
Keywords :
Gaussian channels; Rayleigh channels; channel capacity; channel estimation; diversity reception; receivers; wireless channels; Rayleigh fading channel; channel estimation; estimation error; jointly Gaussian random variables; selection combiner diversity; spectral efficiency; Channel capacity; Channel estimation; Closed-form solution; Diversity reception; Estimation error; Fading; Gaussian channels; Power system modeling; Signal to noise ratio; Transmitters;
Conference_Titel :
Telecommunication Networks and Applications Conference, 2008. ATNAC 2008. Australasian
Conference_Location :
Adelaide, SA
Print_ISBN :
978-1-4244-2602-7
Electronic_ISBN :
978-1-4244-2603-4
DOI :
10.1109/ATNAC.2008.4783334
