Narrow Band Jamming Detection & Filtering in Satellite Transponder

Abstract

This paper proposes a compressive signal processing (CSP) receiver for detection and filtering of narrowband jamming signal within a wideband satellite transponder. The proposed receiver utilizes Modulated Wideband Converter (MWC) sensing architecture to detect the presence of the jamming signal using sub-Nyquist sampling. An Automatic Frequency Control (AFC) technique is used to estimate and track the center frequency of interfering signal. The interfering signal is removed using an on-board notch filter with programmable center frequency and bandwidth. The MWC technique combined with the adaptive notch filter is used to limit the impact of jamming signal without affecting the ongoing communication within the filtered sub band. The proposed scheme provides for a computationally efficient implementation of the next-generation wideband satellite transponders that are robust to narrowband jamming.