Title :
Improved assessment of interference limits in cellular radio performance
Author :
Prasad, Ramjee ; Kegel, Adriaan
Author_Institution :
Telecommun. & Traffic Control Group, Delft Univ. of Technol., Netherlands
fDate :
5/1/1991 12:00:00 AM
Abstract :
Reuse distance aid cluster size are evaluated for cellular mobile radio systems. Rayleigh fading, log-normal shadowing, and area mean power (which is inversely proportional to the fourth power of propagation distance) are considered, using the technique of Schwartz and Yeh (1982) for determining the probability density function of the sum of several log-normal variables in order to obtain the cochannel interference probabilities. These results are used for analyzing the radio spectrum efficiency, taking traffic intensity into consideration. Different modulation methods, namely, analog FM with 30 kHz and 12.5 kHz channel spacing, SSB (single sideband) with 5 kHz spacing, and digital modulation with 25 kHz channel spacing, with adequate protection ratios are compared. An example of the calculation of system bandwidth and cluster size using this procedure is presented
Keywords :
cellular radio; fading; interference (signal); modulation; radiotelephony; Rayleigh fading; SSB; analog FM; area mean power; cellular radio performance; cluster size; cochannel interference probabilities; digital modulation; interference limits; log-normal shadowing; log-normal variables; mobile radio; probability density function; propagation distance; protection ratios; radio spectrum efficiency; radiotelephony; reuse distance; single sideband modulation; system bandwidth; traffic intensity; Amplitude modulation; Channel spacing; Digital modulation; Interchannel interference; Land mobile radio; Land mobile radio cellular systems; Probability density function; Protection; Rayleigh channels; Shadow mapping;
Journal_Title :
Vehicular Technology, IEEE Transactions on
