METHOD FOR DIRECT CHAOTIC COMMUNICATIONS WITH PREDETERMINED SPECTRAL MASK

• US 20100254430A1
• Filed: 06/15/2010
• Published: 10/07/2010
• Est. Priority Date: 11/26/2003
• Status: Active Grant

• Current Assignee: Institute Radio Engineering and Electronics RAS, Samsung Electronics Co. Ltd.
• Original Assignee: Institute Radio Engineering and Electronics RAS, Samsung Electronics Co. Ltd.
• Inventors: Kim, Young-hwan, Lee, Seong-soo, Dmitriev, Alexander S.
• Granted Patent: US 8,116,352 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04L 27/001 using chaotic signals for secret or secure communication H04L9/001

Abstract

Spread spectrum transmission of information is performed using chaotic signals. Direct chaotic communication systems in which information is input to chaotic signal generated directly in information transmission frequency band, are achieved by forming broadband information carrier necessary for transmission and using a chaotic dynamic system whose structure is synthesized in advance in accordance with predetermined characteristics of broadband information carrier to cause chaotic dynamic system to provide operation of forming the broadband information carrier in form of a chaotic information carrier having prescribed spectral characteristics. Modulating the chaotic information carrier is carried out by forming chaotic radio or optic chaotic pulses from chaotic information carrier, with predetermined time intervals between pulses in accordance with the transmitted information signal, and the reception and demodulation at the receiving side is carried out using a dynamic system matched, in behavior, with chaotic dynamic system of transmitting side.

Claims

1. A method for chaotic communications in a wireless personal area network, the method comprising:

generating a chaotic information carrier for a first predetermined frequency range with a ring-structure oscillator including a non-linear element; and

modulating the chaotic information carrier for the first predetermined frequency range with a data signal to generate chaotic pulses;

wherein a shape of a spectral density envelope of the chaotic information carrier for the first predetermined frequency range is determined based on a set of parameters comprising a first set of values.

2. The method of claim 1, wherein the chaotic information carrier for the first predetermined frequency range is generated based on a set of filters.

3. The method of claim 1, wherein a chaotic information carrier for a second predetermined frequency range is generated by using the set of parameters comprising a second set of values.

4. The method of claim 2, wherein a chaotic information carrier for a second predetermined frequency range is generated by adding another filter.

5. An apparatus for chaotic communication comprising:

a chaotic signal generator comprising

a ring-structure oscillator including a non-linear element, the ring-structure oscillator generating a chaotic information carrier for a first predetermined frequency range; and

a modulator which modulates the chaotic information carrier for the first predetermined frequency range with a data signal to generate chaotic pulses;

wherein a shape of a spectral density envelope of the chaotic information carrier for the first predetermined frequency range is determined based on a set of parameters comprising a first set of values.

6. The apparatus of claim 5, wherein the chaotic signal generator comprises a set of filters.

7. The apparatus of claim 5, wherein the chaotic signal generator generates a chaotic information carrier for a second predetermined frequency range by using the set of parameters comprising a second set of values.

8. The apparatus of claim 5, wherein the chaotic signal generator further comprises another filter to generate a chaotic information carrier for a second predetermined frequency range.