Some Recent Results on the Physical Layer Security of Frequency Hopping Systems
This paper considers the physical layer security of frequency hopping (FH) systems. Mainly due to the collision effect among different users, the spectral efficiency of the conventional FH is very low. To overcome this limitation, in this paper, we first propose a general collision-free frequency hopping (CFFH) scheme based on secure spectrum access control; Second, we incorporate the CFFH scheme with OFDMA, and obtain a highly efficient anti-jamming system; Finally, to simplify the secure frequency allocation process in OFDMA based CFFH, we propose an ID based message-driven frequency hopping scheme, which resolves the problem and achieves better jamming resistance with a trade-off in spectral efficiency.
KeywordsFrequency hopping systems Collision-free frequency hopping Jamming resistance
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