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An exact method is employed to analyze the bit error rate (BER) performances of differential chaos shift keying (DCSK) communication system over fading channels. The exact BER performances of DCSK in Nakagami-m, Rayleigh and Rician fading channels are derived, respectively. The Gaussian approximation (GA) method is compared with the exact method. The numerical and simulation results for the two methods...
A new kind of multiple-access differential chaos shift keying (MA-DCSK) is presented. It is based on chaotic Binary sequence and Walsh codes, for convenience, we call it BW-MA-DCSK. In the proposed BWMA-DCSK system, the signals that come from the transmitter and the corresponding receiver are multiplied with the same Walsh codes. Due to the Walsh codes orthogonality and the constant instantaneous...
This paper presents a low power high entropy design of a truly random number generator based on a simple chaotic map of the Bernoulli shift, which is extended to keep robustness in practical implementation. The map is accurately realized by switched-current techniques, and a pipelined architecture post-processed by simple XOR circuits is used to improve the throughput and the entropy. The whole design...
This paper presents a high-speed truly random number generator based on a simple chaotic map of the Bernoulli shift, which is extended to keep robustness in practical implementation. The design is realized by switched- current techniques that can make it be fully integrated in embedded cryptosystems. And a pipelined architecture post- processed by a SHA-1 hardware module is proposed to improve the...
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