Title :
Signal-to-Noise Ratio Comparison of Amplify-Forward and Direct Link in Wireless Sensor Networks
Author :
Viswanathan, Ramanarayanan
Author_Institution :
Dept. of Electr. & Comput. Eng., Southern Illinois Univ., Carbondale, IL, USA
Abstract :
We compare the signal-to-noise ratio performances of an amplify-forward relay link and a direct link in a wireless sensor network. For a slow Rayleigh fading channel, an exact expression for the probability that the SNR of an amplify-forward relay link exceeds the SNR of a direct link is obtained. For a Rician fading channel, an upper bound for the corresponding probability is obtained. Numerical results indicate that, among the two fading channels considered, Rayleigh fading is more detrimental to the SNR performance of the amplify-forward relaying scheme.
Keywords :
Rayleigh channels; Rician channels; probability; telecommunication links; wireless sensor networks; Rayleigh fading channel; Rician fading channel; amplify-forward relay link; direct link; probability; signal-to-noise ratio comparison; wireless sensor network; Background noise; Computer networks; Decoding; Diversity reception; Fading; Rayleigh channels; Relays; Rician channels; Signal to noise ratio; Wireless sensor networks; Rayleigh fading; Rician fading; amplify-forward; cooperative relaying;
Conference_Titel :
Communication Systems Software and Middleware, 2007. COMSWARE 2007. 2nd International Conference on
Conference_Location :
Bangalore
Print_ISBN :
1-4244-0613-7
DOI :
10.1109/COMSWA.2007.382467
