DocumentCode :
3499333
Title :
Decorrelation and Orthogonalization of Correlated Diversity Branches for HS/MRC Diversity
Author :
Loskot, Pavel ; Beaulieu, Norman C.
Author_Institution :
Inst. of Adv. Telecommun., Univ. of Wales Swansea, Swansea
fYear :
2008
fDate :
11-14 May 2008
Firstpage :
335
Lastpage :
339
Abstract :
Four hybrid selection maximum ratio combining (HS/MRC) diversity schemes over correlated Ricean fading channels are investigated. In particular, the correlated diversity branches are either decorrelated or orthogonalized prior to diversity combining. The optimum time-invariant selection of diversity branches prior to MRC as well as conventional HS/MRC are also considered. The average bit error rate (BER) performance of these four diversity combining schemes is obtained using the Prony approximation method and using computer simulations. Numerical results indicate that decorrelation and orthogonalization of the correlated branches prior to diversity combining can restore some of the diversity gain lost due to the correlation between branches. This is observed especially for the case of a strong line-of-sight fading component, and for small numbers of selected branches in HS/MRC diversity where the signal-to-noise ratio (SNR) improvement can be as large as 2 dB.
Keywords :
Rician channels; approximation theory; correlation methods; diversity reception; error statistics; HS/MRC diversity; average bit error rate; correlated Ricean fading channel; correlated diversity branch; decorrelation; hybrid selection maximum ratio combining; line-of-sight fading component; optimum time-invariant selection; orthogonal diversity; prony approximation method; AWGN; Approximation methods; Bit error rate; Decorrelation; Diversity reception; Fading; Performance analysis; Rayleigh channels; Statistics; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
ISSN :
1550-2252
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
Type :
conf
DOI :
10.1109/VETECS.2008.81
Filename :
4525637
Link To Document :
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