Correlated Fading Channel Simulator Based on the Overlap-Save Method

A fading channel emulator particularly suited for simulations of broadband communication systems is investigated. It is based on the overlap-save (OLS) method, traditionally used for efficient convolution. The resulting emulator shows a statistical accuracy comparable to the best known state-of-the-art techniques while greatly reducing complexity in terms of memory requirements. Therefore, it enables real-time simulation and makes the model particularly appealing for a hardware implementation. In addition, the introduction of an OLS-based interpolator enables simulation of very low Doppler frequencies with a high statistical precision.