2010 | OriginalPaper | Buchkapitel
A Spectrally Efficient Anti-Jamming Technique Based on Message Driven Frequency Hopping
verfasst von : Lei Zhang, Jian Ren, Tongtong Li
Erschienen in: Wireless Algorithms, Systems, and Applications
Verlag: Springer Berlin Heidelberg
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This paper considers spectrally efficient anti-jamming system design based on message-driven frequency hopping (MDFH). Unlike conventional FH where the hopping frequencies are determined by a preselected pseudonoise (PN) sequence, in MDFH, part of the message acts as the PN sequence for carrier frequency selection. It is observed that MDFH has high spectral efficiency and is particularly robust under strong jamming. However, disguised jamming from sources of similar power strength can cause performance losses. To overcome this drawback, in this paper, we propose an anti-jamming MDFH (AJ-MDFH) system. The main idea is to transmit a secure ID sequence along with the information stream. The ID sequence is generated through a cryptographic algorithm using the shared secret between the transmitter and the receiver. It is then exploited by the receiver for effective signal detection and extraction. It is shown that AJ-MDFH can effectively reduce the performance degradation caused by disguised jamming. Moreover, AJ-MDFH can be extended to a multi-carrier scheme for higher spectral efficiency and/or more robust jamming resistance. Simulation example is provided to demonstrate the performance of the proposed approaches.