FPGA-Based Antipodal Chaotic Shift Keying Communication System

Abstract

The current work presents a novel digital chaotic communication system with antipodal chaotic shift keying modulation, implemented in a field-programmable gate array (FPGA). Such systems provide high security on the physical communication level and can be used in wireless sensor network systems. A modified Chua circuit chaos generator and error linear feedback chaotic synchronization are implemented in FPGA and used to develop a chaotic communication system with digital transmitter and receiver an analog in-between signal transmission. Additionally, a validated mathematical model of the communication system prototype is created in the Simulink environment, which is used to compare the performance of the prototype and its nodes with the simulation and simplify its development. The performance is evaluated using simulation with the additive white Gaussian noise channel and analyzing the bit error ratio.

A new 4‐D hyperchaotic two‐scroll system with hidden attractor and its field‐programmable gate array implementation

“…The hardware design of a chaotic system can be performed using the MATLAB tool known as Simulink, 17 but the designer cannot take control on the manipulation of bits, as done when using numerical methods to discretize the block description of a dynamical system 16 . The use of the chaotic systems implemented on FPGAs is quite important in applications as for the development of digital chaotic communication systems, as shown in Capligins et al, 17 where the authors claim the FPGA design of a modified Chua's circuit along an antipodal chaotic shift keying modulation provide high security on the physical communication level and can be used in wireless sensor network systems. On this regard, as a hyperchaotic system provides better chaotic behavior than Chua's circuit, several applications can be enhanced using our proposed FPGA design of the new 4‐D hyperchaotic two‐scroll system with hidden attractor.…”

“…Recent works show the implementation of hyperchaotic systems using field‐programmable gate arrays (FPGA), as they have advantages for fast verification and prototyping, as already shown in previous works 16,17 . The hardware design in this case makes use of fixed‐point notation to perform computer arithmetic, and the length of the number of bits that are used to process the signals depends on the amplitudes of the state variables of the dynamical system.…”

“…Recent works show the implementation of hyperchaotic systems using field-programmable gate arrays (FPGA), as they have advantages for fast verification and prototyping, as already shown in previous works. 16,17 The hardware design in this case makes use of fixed-point notation to perform computer arithmetic, and the length of the number of bits that are used to process the signals depends on the amplitudes of the state variables of the dynamical system. In some cases, the amplitudes can be downscaled to be within desirable values, so that one can design the systems using integrated circuit (IC) technology, which allow amplitudes around ±1, as recently shown in Valencia-Ponce et al 18 In this work, the new 4-D hyperchaotic two-scroll system with hidden attractor is prototyped using the FPGA Zybo Z7-20 development board, and a scaling process is performed to observe the experimental attractors, as detailed in Section 6.…”

Use of memristor-based chaotic circuits in AM-DCSK and FM-DCSK modulation

“…When the current is re-applied, the memristor exhibits this stored resistance value. In our computer simulators the behavior of memristors is described by a circuit emulator published in [17,51,52]. For more details on the emulator and the properties of memristor-based hyperchaotic systems it refer to [53,54].…”

“…By comparing the results with other modulation schemes using the bit error rate (BER) graph, the study demonstrated the potential of the proposed chaos-based system for secure communication. Capligins et al proposed a new digital chaotic communication system featuring antipodal chaotic shift keying modulation [51]. The system was implemented using a fieldprogrammable gate array (FPGA) and offers enhanced security at the physical communication level.…”