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This paper considers spectrally efficient antijamming system design based on message-driven frequency hopping (MDFH). As a highly efficient frequency hopping scheme, MDFH 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, first, we propose an anti-jamming MDFH (AJ-MDFH)...
This paper considers highly efficient jamming resilient wireless system design. First, we introduce a collision free frequency hopping (CFFH) system based on the OFDMA framework and an innovative secure subcarrier assignment scheme. The secure subcarrier assignment algorithm is designed to ensure that: (i) Each user hops to a new set of subcarriers in a pseudo-random manner at the beginning of each...
This paper considers spectrally efficient anti-jamming system design based on message-driven frequency hopping (MDFH). We first analyze the performance of the MDFH system under different jamming scenarios. It is observed that MDFH is particularly robust under strong jamming. However, it experiences a performance bottleneck under disguised jamming, for which the jamming power is close to the signal...
Originally developed for secure communications in military applications, frequency hopping systems possess anti-jamming and anti-interception features by exploiting time- frequency diversity over large spectrum. However, the spectral efficiency of existing FH systems is very low due to inappropriate use of the total available bandwidth. To improve the system capacity, in this paper, we propose an...
Frequency hopping systems have been widely used in military communications to prevent hostile jamming, interception and detection. In traditional frequency hopping (FH) systems, the transmitter hops in a pseudo-random manner among available frequencies according to a pre- specified algorithm, and the receiver operates accordingly in exact synchronization with the transmitter's hopping pattern. In...
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