DYNAMIC-RANGE REQUIREMENTS FOR MICROCELLULAR PERSONAL COMMUNICATION-SYSTEMS USING ANALOG FIBEROPTIC LINKS

Fiber infrastructures in future personal communication systems (PCS's) must minimize remote antenna size and cost, and facilitate system mai ntenance and upgradeability. These goals can be met by a centralized P CS infrastructure using analog fiber-optic links, It is essential that the relationship between optical-link quality in terms of spurious-fr ee dynamic range (SFDR) and PCS quality of service be accurately quant ified so that optical device and other infrastructure design requireme nts can be determined, This paper presents a comprehensive wireless/op tical simulation model which combines wireless system characteristics (web as fading, cochannel interference, diversity, and power control) with the noise and nonlinearities of fiber-optic links, Results of the simulation indicate that representative SFDR requirements for fiber i nfrastructures in PCS systems are in the 72-83 dB.Hz(2/3) range, The i mpact of varying environmental characteristics as quantified by distan ce loss and shadowing variance is between 7-10 dB, A larger distance l oss or lower shadowing variance result in Bower SFDR requirements, The required automatic gain control (AGC) accuracy decreases as the SFDR increases, These results indicate that either distributed feedback (DF B) or Fabry-Pekoe (FP) semiconductor laser diodes can be used in the i mplementation of PCS infrastructures.