Signal-to-interference calculations for corner-excited cellular communications systems

Signal-to-inference ratio calculations for corner-excited cellular communications systems are presented. Specifically, the ratio of median signal power to the sum of median interference powers is considered. The interference model includes cochannel interference, and immediately adjacent as well as nonimmediately adjacent channel interference. Related system parameters are cluster size, receiver, and transmitter filter characteristics, propagation exponent, tier coverage, and directional antenna front-to-back ratio. Both mobile-to-baseand base-to-mobile communications are considered. The method and model used for calculation are more complete than any previously reported in the technical literature. The calculated results show that the effect of adjacent channel interference compared to cochannel interference cannot be ignored in general. In mobile-to-base communications, the effect of immediately adjacent channel interference introduced by an interfering mobile which is very close to the receiving base antenna is serious