On Modelling Cellular Interference for Multi-Carrier based Communication Systems Including a Synchronization Offset
Gunther Auer, Armin Dammann, Stephan Sand, Stefan Kaiser · elib (German Aerospace Center) · 2003
We address the downlink of a cellular multi-carrier CDMA (MC-CDMA) system. The nature of celluar interference is dependent on the synchronization mismatch between interfering base stations (BS). For an unsynchronized system the interference observed at a certain subcarrier stems from all interfering subcarriers, so the interference can be modeled as white Gaussian noise. For a perfectly synchronized system, on the other hand, orthogonality between subcarriers is preserved and the interference can be described on the subcarrier level, which may not be Gaussian. In this paper the performance of a cellular MC-CDMA system is analysed in the presence of a synchronization offset between two interfering BS. Furthermore, models to simplify the simulation of interference are examined.