In this paper we investigate the degradation of statistic properties chaotic maps as consequence their implementation in a digital media such Digital Signal Processors (DSP), Field Programmable Gate Arrays (FPGA) or Application-Specific Integrated Circuits (ASIC). these systems, binary floating- and fixed-point are numerical representations available. Fixed-point representation is preferred over floating-point when speed, low power and/or small circuit area necessary. Then, compare precision...

The use of chaotic systems in electronics, such as Pseudo-Random Number Generators (PRNGs), is very appealing. Among them, continuous-time ones are used less because, addition to having strong temporal correlations, they require further computations obtain the discrete solutions. Here, time step and discretization method selection first studied by conducting a detailed analysis their effect on systems’ statistical behavior. We employ an approach based interpreting parameter new “maps”. From...

This paper deals with the use of Ring Oscillators (ROs) as pseudo random number generators (PRNG). The design, made for ALTERA Cyclone III ©, using low level primitives is explained. Two relevant characteristics a PRNG are considered to validate design: 1) equiprobability all possible outcomes and 2) statistical independence consecutive values. In this work these properties measured via Information Theory Quantifiers. A dual entropy plane used represent time series easily visualize results...

In this paper a hardware implementation of Maximum Lyapunov Exponent (MLE) quantifier is designed and implemented using field programmable gate array (FPGA). The design was optimized in terms accuracy employing floating point architecture to represent the values. proposed takes advantage underline parallelism MLE computation equations allows its concurrent based on FPGA technology.

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This paper proposes a hybrid data ordering algorithm which executes serial and parallel instructions. The implementation of the system is presented in Zedboard development board Xilinx that includes SoC (System on Chip). design was done high level language HLS (High Level Synthesis). It receives vector N elements delivers set indexes L major ordered. complexity analyzed generic way. required times resources are evaluated compared with well known sorting algorithms.

This paper describes the implementation of a system for measuring entropy. The design was optimized to be implemented in simple and small microcontroller, achieving acceptable accuracy. allows entropy internally code-generated signals, also, sampled external analog signals. development board used M1AFS-embedded kit Actel. In FPGA (Field Programmable Gate Array) microcontroller 8051 instantiated programmed C language. hardware software are described also obtained results.

Chaotic sequences are good candidates to replace random in many digital electronic applications, this is due their stochastic appearance and, under certain considerations, easy hardware implementation. On the other hand, Compressed Sensing (CS) technique allows efficient acquisition and reconstruction of signals from a smaller number samples than that required by Shannon-Nyquist sampling theorem. A critical point choice implementation, usually used. These computationally expensive generate,...

Ring Oscillators (ROs) are established as practical thermal sensors in Field Programmable Gate Array (FPGA) devices. Despite its proven technical usefulness low-power design and aspects of integrated circuit, a detailed standard procedure is not found the literature. In this paper we present an optimized scheme including description all elements considerations, so those interested can quickly incorporate these ideas. Also, show implementation, calibration resources performing...

The maximum Lyapunov exponent (MLE) of a dynamic system is quantity that characterizes the degree separation two infinitesimally close paths, it gives measure average rate exponential divergence nearby orbits. It known as general indicator presence chaos in system. This quantifier has been applied diverse fields, such biomedicine and finance, many these applications, inaccessible also real-time measurement required. In this work, Kantz's estimator MLE [1] was implemented PSoC (Programmable...

Gran parte de las aplicaciones electrónicas requieren números pseudoaleatorios, en general, para mejorar su funcionamiento. Tal es el caso los sistemas encriptación, codificación y modulación digital. Si, además, pseudoaleatorios varían dinámicamente función densidad probabilidad (PDF) posible potenciar efecto causado. En este trabajo se presenta diseño e implementación un circuito capaz entregar que PDF tiempo. Para ello, utilizan como base mapas caóticos, son diseñados según deseadas....

El trabajo presenta el diseño e implementación de un generador señales moduladas en fase, cual permite variar amplio rango sus parámetros transmisión. Se buscó que circuito final utilice una mínima cantidad recursos la FPGA. Esto fue posible ya desarrollado almacena cuarto ciclo portadora, luego lógica control decide cuáles muestras tomar para obtener frecuencia y ciclos por dato establecidos, permitiendo gran variación. También es configurable potencia salida señal. Además, sistema recibir...

In this article, a new technique for the detection of primary users in cognitive radio (CR) is presented. The proposed based on statistical quantifiers that take into account causal information from received signal. Results show quick decision about transmission data possible by sensing very short time. Furthermore, heavily noise-contaminated signals are detectable, even without prior level noise channel. We performance method and conclude comparable to those used classically. Finally, we...