Title :
Frequency planning considerations for digital cellular systems
Author_Institution :
BNR Inc., Richardson, TX
Abstract :
Cellular systems where interference is the limiting factor are discussed. In an interference-limited environment, two important system design parameters that directly affect the capacity of the overall system are the minimum carrier to cochannel interference ratio (C/I) and the maximum adjacent channel interference ratio (ACI) the system can tolerate without degrading the speech quality. For these reasons, Northern Telecom has proposed a digital cellular system that is capable of meeting the requirements that were set by members of the Cellular Telecommunication Industry Association (CTIA) for the digital cellular system. Worst-case figures for both C/I and ACI are computed for typical applications for both the forward and the reverse channels, with different reuse patterns, antenna configurations, and terrain. As a result, some frequency planning guidelines for the proper operation of the digital cellular system are presented
Keywords :
cellular radio; digital radio systems; radiofrequency interference; radiotelephony; Cellular Telecommunication Industry Association; Northern Telecom; adjacent channel interference ratio; antenna configurations; carrier to cochannel interference ratio; digital cellular systems; frequency planning; interference; reuse patterns; speech quality; system capacity; system design parameters; terrain; Antennas and propagation; Capacity planning; Degradation; Digital modulation; Directional antennas; Frequency; Interchannel interference; Mobile antennas; Robustness; System performance;
Conference_Titel :
Vehicular Technology Conference, 1990 IEEE 40th
Conference_Location :
Orlando, FL
DOI :
10.1109/VETEC.1990.110321