Design of FH sequences based on chaotic map

Based on one-dimensional chaotic map, a novel method for generating chaotic frequency-hopping (FH) sequences was proposed. In order to maintain the useful chaos properties of the nonlinear dynamical system as much as possible, the chaotic real-valued sequences of nonlinear maps were directly encoded to bit sequences rather than by a threshold function, then chaotic FH sequences by reshaping bits of these bit sequences were obtained The performance analysis and experiment results show that the sequence has the same balance properties, FH number and sequence length as other FH sequences, but much less requirements of iterative operation and much more anti-jamming and anti-intercept capacities. It can be concluded that the FH sequences generated by the novel method are suitable for FH code-division multiple-access systems.