Strategies for Jamming in Discrete Frequency Subbands - Characteristics and Main Applications

The progress in applied techniques to cause more human victims and material damage is obvious every day. Two of such sources are remote controlled improvised explosive devices and drones for malicious purposes. The frequencies and message bit rates for necessary signals transmission of such devices are continually increasing thus leading to efficiency decrease of classical jamming techniques, especially pure sweep jamming. In this paper we analyze comb jamming and sweep jamming with discrete subbands as two techniques to overcome this problem. IRITEL is one of the pioneers in the world in the implementation of both strategies. In the first case several discrete frequency components are swept in the same time and thus the sweep rate is effectively increased. The second technique is well suited to be implemented when signal frequencies and signal levels to be jammed are a priori known.