Mahboobeh Eghtesad - Department of Electronics Engineering ,Shiraz branch, Islamic Azad University, Shiraz , Iran
Reza Mohseni - Department of Electrical and Electronics Eng. School of Engenireeng ,Shiraz university of technology,Shiraz,Iran,

we develop methods for detecting a target for orthogonal frequency division multiplexing (OFDM) based radars. As a preliminary step we introduce the target and Gaussian noise models in discrete –time form. Then resorting to match filter (MF) we derive a detector for two different scenarios (a non- fluctuating target and a Rayleigh fluctuating target). It will be shown that a MF is not suitable for Rayleigh fluctuating targets. In this paper we propose a reduced – complexity method based on fast Fouriertransfrom (FFT) for such a situation. The proposed method has better detection performance.

Constant false alarm rate (CFAR), match filter (MF), fast fourier transform (FFT), OFDM radars, Rayleigh fluctuating target