Title :
Effects of correlated shadowing signals on channel reuse in mobile radio systems
Author :
Safak, Aysel ; Prasad, Ramjee
Author_Institution :
Telecommun. & Traffic-Control Syst. Group, Delft Univ. of Technol., Netherlands
fDate :
11/1/1991 12:00:00 AM
Abstract :
The authors present a study to evaluate the cochannel interference probability for the desired and interference signals which are correlated due to shadowing. The effects of correlation on the normalized reuse distance are investigated. A generalized expression for the cochannel interference probability is derived by combining uncorrelated (fast) Rayleigh fading and correlated (slow) log-normal signals. The cochannel interference probability for sectorized cell layouts is compared with the lower bound of cochannel interference probability for omnidirectional antenna systems. It is found that omnidirectional cell layouts cause the highest level of cochannel interference probability. An omnidirectional system requires a higher cluster size than a directional system to maintain acceptable cochannel interference
Keywords :
cellular radio; fading; frequency allocation; interference (signal); mobile radio systems; Rayleigh fading; channel reuse; cochannel interference probability; correlated shadowing signals; log-normal signals; mobile radio systems; omnidirectional antenna systems; sectorized cell layouts; Fading; Frequency; Genetic expression; Interchannel interference; Land mobile radio; Packet radio networks; Probability; Rayleigh channels; Shadow mapping; Telephony;
Journal_Title :
Vehicular Technology, IEEE Transactions on
