Impact on capacity to AMPS jamming CDMA/CDMA jamming AMPS in adjacent cells

The authors address the mutual interference caused by the coexistence of narrowband code division multiple access (N-CDMA) and narrowband cellular telephone technologies, i.e., advanced mobile phone system and time division multiple access (AMPS and TDMA). It is shown that when adjacent service areas are using AMPS or TDMA, a dead zone of up to two cells is required before N-CDMA can be deployed. The resulting capacity of the N-CDMA service area is lessened to an extent dependent upon the service area geometry. The dead zone can be extensive enough where the N-CDMA would yield only marginal capacity improvement over AMPS and TDMA.