Title :
Channel capacity of adaptive transmission with maximal ratio combining in correlated Rayleigh fading
Author :
Mallik, Ranjan K. ; Win, Moe Z. ; Shao, Joshua W. ; Alouini, Mohamed-Slim ; Goldsmith, Andrea J.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol.-Delhi, New Delhi, India
fDate :
7/1/2004 12:00:00 AM
Abstract :
We derive closed-form expressions for the single-user capacity of maximal ratio combining diversity systems taking into account the effect of correlation between the different branches. We consider a Rayleigh fading channel with two kinds of correlation: 1) equal branch signal-to-noise ratios (SNRs) and the same correlation between any pair of branches and 2) unequal branch SNRs and arbitrary correlation between branches such that the eigenvalues of the branch covariance matrix are all distinct. Three adaptive transmission schemes are analyzed: 1) optimal simultaneous power and rate adaptation; 2) optimal rate adaptation with constant transmit power; and 3) channel inversion with fixed rate.
Keywords :
Rayleigh channels; channel capacity; correlation methods; covariance matrices; diversity reception; eigenvalues and eigenfunctions; adaptive transmission method; arbitrary correlation; branch covariance matrix; channel capacity; channel inversion with fixed rate; correlated Rayleigh fading channel; eigenvalue; equal branch signal-to-noise ratio; maximal ratio combining diversity system; optimal rate adaptation with constant transmit power; optimal simultaneous power and rate adaption method; unequal branch SNR; Channel capacity; Closed-form solution; Covariance matrix; Diversity reception; Eigenvalues and eigenfunctions; Fading; Rayleigh channels; Signal to noise ratio; Transmitters; Vehicular and wireless technologies; Adaptive transmission; MRC; channel capacity; correlated Rayleigh fading; maximal ratio combining;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2004.830823
