Interference resistant modulation using transform domain processing

Abstract

Digital mobile battlefield environments impose challenging obstacles to battle group communications and data management. As future communication capabilities cascade from tactical commanders to individual soldiers, spectral clutter and hostile jamming complicate the task of preserving data throughput. Frequency hop (FH) and direct sequence (DS) methodologies have inherent strengths that must be exploited to overcome communication obstacles. In this paper, we present a hybrid methodology that combines FH waveforms with pulse concealment and transform domain signal processing in order to overcome interference, hostile detection, and jamming. Rejection algorithms are demonstrated which significantly improve system performance in the presence of high-power partial-band jammers, co-site communication signals, and fading.