RU2298281C1 - Device and method for generation of chaotic signal - Google Patents

Abstract

FIELD: radio and electrical engineering, applicable for designing of transceiving devices.

SUBSTANCE: the device has a group of independent pulse generators, OR gates, a group of independent sinusoidal oscillators and an adder. A binary signal with a pseudorandom phase manipulation is formed in the method, this signal is used for switching-on and switching-off of the sinusoidal oscillators, the signals of the sinusoidal oscillators are summed up in the adder with formation of a chaotic signal at its output.

EFFECT: generated a noise signal with a preset width of the spectrum at a low level of power consumption.

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Description

The invention relates to the field of radio engineering, and more particularly to devices and methods for generating a chaotic signal, and can be used in the design of transceiver devices.

Chaos generators are used in telecommunication systems, since in most cases the combination and shape of the chaotic signal pulses are information carriers.

Closest to the proposed invention is the design of the chaos generator described in the application RU 2003134263 [1], in which the ability of nonlinear deterministic systems to generate a chaotic signal is used as the main element. This design is selected as a prototype of the claimed invention.

The simplicity of the design of this circuit could find its wide application in the field of radio communications and in control systems, if not for the significant drawbacks inherent in nonlinear deterministic systems, namely:

- large power consumption due to the need to maintain multiphase oscillations in a highly nonlinear system;

- the need to use a bulky and inflexible oscillatory system to work in each specific frequency range.

The problem solved by the present invention is to create a compact device for generating a noise signal with flexible parameters and with a low level of energy consumption, as well as a method of its functioning for operation in different frequency ranges.

The technical result in the first part of the task is achieved by creating a device for generating a chaotic signal, which contains the following.

- An array of pulse generators, each of which generates a pulse signal of low duty cycle, each of the generators being independent and having a pulse repetition rate different from other generators. The parameters of the signal generated by each of the pulse generators affect the width of the signal spectrum and the power of the signal generated by the device, but are not fundamental for the operation of the device as a whole.

- An array of independent sinusoidal generators, each of which has a different operating frequency than other generators.

- An array of OR gates with the number of inputs equal to the number of pulse generators, and the number of OR gates is equal to the number of sinusoidal generators.

- Adder output signals of sinusoidal generators.

In the inventive device, the output of each of the pulse generators is connected to the inputs of OR gates, the outputs of which are connected to the inputs of the sinusoidal generators, and the outputs of the sinusoidal generators are connected to the input of the adder, from the output of which a chaotic signal is taken.

The technical result in solving the second part of the task is to develop a method of functioning of the above device in different frequency ranges. Moreover, the new method includes the following operations using the device for generating a chaotic signal.

In an array of independent pulse generators, they generate signals and feed them to the inputs of each of the OR gates. As a result, a binary signal with pseudo-random phase manipulation is formed at the output of each of the OR elements. Moreover, at the outputs of each of the elements OR the signal is the same.

Next, use the signal from the output of the OR element to control the operation of one of the sinusoidal generators.

Sine-wave generators are turned on and off using a binary signal that is generated by an OR gate. The output signals of the sinusoidal generators are combined using an adder. At the output of the adder receive a chaotic signal.

The condition that the number of OR elements should correspond to the number of sinusoidal generators is not essential. You can limit yourself to even one OR element. In the described embodiment of the invention, the number of OR elements corresponds to the number of sinusoidal generators, which is done to ensure the independence of the sinusoidal generators.

The compactness of the device is achieved through the use of pulse and sinusoidal generators - generators with a resistor-capacitive frequency-specifying circuit.

The flexibility of the device parameters in the formation of the desired spectral characteristics is ensured by the fact that the spectrum is formed on the basis of an array of sinusoidal generators turned on and off by means of a pseudo-random binary signal.

Low energy consumption of the device is ensured through the use of both pulsed and sinusoidal generators as array elements, which are non-critical to the level of energy consumption and can be substantially reduced.

For a better understanding of the essence of the present invention, its description is illustrated by the corresponding drawings.

Figure 1 - block diagram of a device for generating a chaotic signal, made according to the invention, which shows the generators 1.1-1.k pulses, elements 2.1-2.k OR, sinusoidal generators 3.1-3.k, adder 4. The output of each of the generators 1.1 -1.k pulses are connected to the inputs of the logic elements 2.1-2.k OR, the outputs of which are connected to the inputs of the sinusoidal generators 3.1-3.k, and the outputs of the sinusoidal generators 3.1-3.k are connected to the input of the adder 4, from the output of which chaotic signal.

Figure 2 - algorithm for performing operations when implementing the method for generating a chaotic signal according to the invention. In this method, binary signals are formed from signals from an array of independent pulse generators. in this context, a two-level, signal with pseudo-random phase manipulation. The binary signal obtained in this way is used to control the operation of an array of independent sinusoidal generators, with one signal level turning off the generators and another level turning off the generators.

Claims (2)

1. A device for generating a chaotic signal containing an array of independent pulse generators, the output of each of which is connected to the input of the OR logic element, while the number of OR elements is equal to the number of independent pulse generators, an array of independent sinusoidal generators whose inputs are connected to the outputs of the OR elements, and the outputs Sine-wave generators are connected to the input of the adder, at the output of which a chaotic signal is formed. 2. The method of operation of the device for generating a chaotic signal, which consists in generating a binary signal with pseudo-random phase manipulation from the signals of an array of independent pulse generators, using the binary signal obtained in this way to control the operation of an array of independent sinusoidal generators, including generators, and through the second level they turn off the generators, sum the signals of the sinusoidal generators in the adder and form ode adder chaotic signal.