Title :
Analysis of hybrid selection/maximal-ratio combining in Rayleigh fading
Author :
Win, Moe Z. ; Winters, Jack H.
Author_Institution :
Dept. of Wireless Syst. Res., AT&T Bell Labs., Red Bank, NJ, USA
Abstract :
The performance of a hybrid selection/maximal ratio combining (H-S/MRC) diversity system in a multipath-fading environment is analyzed. With H-S/MRC, L out of N diversity branches are selected and combined using maximal-ratio combining (MRC). This technique provides improved performance over L branch MRC when additional diversity is available, without requiring additional electronics and/or power. In particular, we consider independent Rayleigh fading on each diversity branch with equal signal-to-noise ratio averaged over the fading. We analyze this system using a “virtual branch” technique which results in a simple derivation and formula for the mean and the variance of the combiner output SNR for any L and N
Keywords :
Rayleigh channels; diversity reception; multipath channels; Rayleigh fading; combiner output SNR; diversity branches; diversity system; hybrid selection/maximal-ratio combining; independent Rayleigh fading; maximal-ratio combining; multipath-fading environment; performance analysis; signal-to-noise ratio; virtual branch; wireless system capacity; Analysis of variance; Diversity methods; Diversity reception; Fading; Helium; Lifting equipment; Performance analysis; Rayleigh channels; Signal to noise ratio; Telephone sets;
Conference_Titel :
Communications, 1999. ICC '99. 1999 IEEE International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-5284-X
DOI :
10.1109/ICC.1999.767866
