Effects of correlated shadowing signals on channel reuse in mobile radio systems

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. >

[1]  K. Tartono,et al.  Radio Link Design of Cellular Land Mobile Communication Systems , 1982 .

[2]  R. C. French.  The effect of fading and shadowing on channel reuse in mobile radio , 1979, IEEE Transactions on Vehicular Technology.

[3]  S. Heeralall,et al.  High capacity cellular patterns for land mobile radio systems using directional antennas , 1989 .

[4]  Y. Akaiwa,et al.  Analysis for spectrum efficiency in single cell trunked and cellular mobile radio , 1987, IEEE Transactions on Vehicular Technology.

[5]  R. Muammar,et al.  Cochannel Interference in High-Capacity Mobile Radio Systems , 1982, IEEE Trans. Commun..

[6]  K. Daikoku,et al.  Optimal channel reuse in cellular land mobile radio systems , 1983, IEEE Transactions on Vehicular Technology.

[7]  Ramjee Prasad,et al.  Comments on "Analysis for spectrum efficiency in single cell trunked and cellular mobile radio , 1988 .

[8]  S. Schwartz,et al.  On the distribution function and moments of power sums with log-normal components , 1982, The Bell System Technical Journal.

[9]  Ramjee Prasad,et al.  Analysis of system performance of high-capacity mobile radio , 1989, IEEE 39th Vehicular Technology Conference.

[10]  David R. Cox.  Cochannel Interference Considerations in Frequency Reuse Small-Coverage-Area Radio Systems , 1982, IEEE Trans. Commun..

[11]  William C. Y. Lee,et al.  Mobile Cellular Telecommunications Systems , 1989 .

[12]  Petr Beckmann,et al.  Probability in communication engineering , 1967 .

[13]  W.C.Y. Lee.  Elements of cellular mobile radio systems , 1986, IEEE Transactions on Vehicular Technology.