ABSTRACT
The structure of the sending end is shown in Fig.3. Jerk chaotic signal generator selects dierent parameters and initial conditions for L iteration to generate M segment length of chaotic sequence of L (each section of chaotic sequences corresponding dierent scroll chaotic attractor in phase space). The digital information about M system according to the corresponding Table 1 shows the mapping to the chaotic sequence segments corresponding (mapping relation can be adjusted according to needs, and then increase the system security), and then sent to the transmitter chaotic sequence. Mapping method is used in this paper: firstly, the binary digital information through the serial parallel conversion to a N binary
(a) 4 Scroll XY phase diagram
(b) Delayed feedback after four scroll
information and then through coding module get M band digital information S, in which log2N M= ,
( 1, 2,..., 1)b i Ni = − . Then get the chaotic sequence corresponding to the S according to the mapping relationship, M chaotic sequence represents the M band information symbol sequence S, the digital information conversion sequences for dierent phase space regions, into the channel.
