Title :
On the sum of multiplicative chi-square-lognormal random variables
Author :
Tighe, Jan E. ; Ha, Tri T.
Author_Institution :
Dept. of Electr. Eng., Naval Postgraduate Sch., Monterey, CA, USA
Abstract :
In order to analyze the performance of the DS-CDMA cellular forward channel with convolutional encoding and soft-decision decoding operating in a Rayleigh-fading and lognormal-shadowing environment, we require the probability distribution function for a sum of d multiplicative chi-square (with two degrees of freedom)-lognormal random variables. We approximate the sum using a multiplicative chi-square(with 2d degrees of freedom)-lognormal random variable which is developed in this paper. We further investigate the usefulness of the approximation as it applies to the performance analysis of the DS-CDMA cellular forward channel
Keywords :
cellular radio; code division multiple access; multiuser channels; probability; random processes; spread spectrum communication; DS-CDMA cellular forward channel; Rayleigh-fading; approximation; lognormal-shadowing environment; multiplicative chi-square-lognormal random variables; performance analysis; probability distribution function; Convolutional codes; Decoding; Error correction; Multiaccess communication; Performance analysis; Probability distribution; Random variables; Rayleigh channels; Shadow mapping; Upper bound;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.966375
