Providing from the robustness of differential chaos shift keying (DCSK) against linear and non-linear channel distortions, in this paper, we propose using this non-coherent modulation with blanking device as a potential candidate for implementation in power-line communications. The performance of this system is analyzed in the general case where background, impulsive and phase noises exist. We derive the probability of blanking error as well as the bit error rate with and without blanking. Moreover, the proposed system is compared to differential phase shift keying (DPSK) modulation to highlight the robustness of DCSK scheme against phase noise imperfection.

Data rate and energy efficiency decrement caused by the transmission of reference and data carrier signals in equal portions constitute the major drawback of differential chaos shift keying (DCSK) systems. To overcome this dominant drawback, a short reference DCSK system (SR-DCSK) is proposed. In SRDCSK, the number of chaotic samples that constitute the reference signal is shortened to R such that it occupies less than half of the bit duration. To build the transmitted data signal, P concatenated replicas of R are used to spread the data. This operation increases data rate and enhances energy efficiency without imposing extra complexity onto the system structure. The receiver uses its knowledge of the integers R and P to recover the data. The proposed system is analytically studied and the enhanced data rate and bit energy saving percentages are computed. Furthermore, theoretical performance for AWGN and multipath fading channels are derived and validated via simulation. In addition, optimising the length of the reference signal R is exposed to detailed discussion and analysis. Finally, the application of the proposed short reference technique to the majority of transmit reference systems such as DCSK, multicarrier DCSK, and quadratic chaos shift keying enhances the overall performance of this class of chaotic modulations and is, therefore, promising.

In this paper, the implementation of a ZigBee based integrated WSN and RFID system suitable for an industrial environment is explained. The overall system consists of a central monitoring station connected to local stations through Ethernet backbone. The local stations communicate with ZigBee coordinators. Active RFID tags as well as sensors associated with ZigBee have wireless communication with ZigBee coordinator through ZigBee routers. The whole system is implemented and issues are presented in the paper.