Interface between Link and System Level Simulations for Downlink MC-CDMA Cellular Systems

Inhalt:
The aim of the interface between link and system level simulations is to provide accurate link level modeling to the system level simulations. The link level modeling consists mainly in defining an appropriate link quality metric (LQM) that is easy to evaluate at the system level and that can be directly mapped to the average bit (BER) and frame (FER) error rates. This paper presents an accurate and low complexity average value link to system level interface for MC-CDMA systems in the downlink. The term “average value” refers to when the observation time scale is large compared to the channel coherence time. This corresponds to the practical cases where the packet size is large and/or the Doppler spread is large. Such preliminary study is a first step in order to assess the impact of the MC-CDMA physical layer algorithms on the system capacity, which is crucial for system design.