Abstract
The technical difficulty of antifollower jamming in communication systems is a wide concern in the peer. In order to solve the problem of difficulty to achieve antifollower jamming, a new identification method of follower jamming is proposed in this paper based on the characteristics of it and then follower jamming is cancelled out. A hardware-in-the-loop simulation platform is built by using FPGA. Then, experimental verification for mitigating performance of follower jamming is conducted based on the platform and the proposed method. Results show that signal-interference ratio (SIR) promotion is different for different jamming frequencies and the jamming mitigation performance is affected by interference intensity. The average SIR promotion can reach 10 dB when variance of jamming signal is between 0.75 and 1.5. In other cases, average SIR promotion is less than 10 dB. The proposed suppression method provides a useful way to antifollower jamming in frequency hopping (FH) communication.
Highlights
frequency hopping (FH) [1, 2] communication is used extensively in military communications because of a series of unique advantages such as strong antijamming ability, low probability of interception, and easy networking [3]
To facilitate the jamming mitigation performance, signal-interference ratio (SIR) before and after cancellation are respectively calculated in M file. e SIR promotion is taken as the evaluation index to analyze the effect of follower jamming suppression with different interference intensities and frequency points
It is clear to see that SIR promotion has some difference for different frequency points
Summary
FH [1, 2] communication is used extensively in military communications because of a series of unique advantages such as strong antijamming ability, low probability of interception, and easy networking [3]. Effective utilization measures for follower jamming include improving the capability of FH networking, increasing the hop rate of FH, and adding the pattern complexity of FH [5]. The above method can mitigate the influence of follower jamming, it will increase the complexity and technical difficulty of equipment. New FH systems such as differential FH (DFH) [6], multisequence FH [7], and self-encoded spread spectrum [8] have certain capability of antifollower jamming, but they improve the FH principle and increase the difficulty of implementation. The spatial antijamming method [9, 10] can theoretically suppress the follower jamming, it is difficult to function with the current technical level. The spatial antijamming method [9, 10] can theoretically suppress the follower jamming, it is difficult to function with the current technical level. us, antifollower jamming is still a difficult problem
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