Reducing Effect of in Band Interference in FMCW Channel Data Using Doppler Pre-filtered Prony Modelling

Abstract

The aim of this study is to reduce the effect of in band interference in frequency modulated continuous wave (FMCW) channel data. In band interference distorts the detector output of FMCW sounder which is normally sum of sinusoidal signals. This distortion causes abrupt fluctuation in time domain signal at the detector output and increases noise floor in average power delay profile (APDP). In this study Prony method with pre-filtering in Doppler domain was used to reduce the effect of in-band interference. The proposed method effectively reduced noise floor in APDP by more than 10 dB.