Abstract: The paper presents a hop generation method for a frequency hopping (FH) signals interception system based on spectrogram.The hop generation performance of the proposed method is investigated, and the iterative SAHADTA algorithm that calculates the average contribution of a single actual hop to dwell-time histogram developed.A numeric example is also given.Theoretic analysis and the example show that the proposed method has good hop generation performance even under low signal detecting probability, making the hop-based clustering more reliable.

Key words: spectrogram, dwell-time histogram, hop generation, SAHADTA algorithm, interception of frequency hopping (FH) signal