On the performance of coexisting spread spectrum systems

Abstract

Wireless communication services may in the future be provided by a larger number of operators than provide the services today. A key enabling factor is the possibility to automatically share the radio spectrum. Bandwidth efficiency is defined as the number of users that can be supported by a base station in a given spectrum. The bandwidth efficiency in a DS-CDMA and a frequency hopping system is studied when two operators share the same spectrum. The influence of base station location is also studied. The results indicate a substantial loss for the DS-CDMA system and a lower loss for the frequency hopping system.