Non-linear digital communications system

• US 5,729,607 A
• Filed: 05/16/1996
• Issued: 03/17/1998
• Est. Priority Date: 08/12/1994
• Status: Expired due to Fees

• Current Assignee: Neosoft Corporation
• Original Assignee: Neosoft Corporation
• Inventors: DeFries, Anthony, Denis, Andrew
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): Corrielus, Jean B.
• Application Number:
  US08/649,976
• Time in Patent Office: 670 Days
• Field of Search: 375/254, 375/285, 375/296, 375/346, 375/227, 375/377, 375/259, 375/200, 375/206, 380/6, 380/28, 380/31, 380/34, 380/43, 380/46, 380/49, 380/48, 455/39
• US Class Current: 380/263
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04B 7/00 Radio transmission systems, i.e. using radiation field H04B10/00, H04B15/00 take precedence
• CPC Class Codes: H04J 1/12 Arrangements for reducing cross-talk between channels in line transmission systems H04B3/32; in cables or lines H04B3/26 - H04B3/30
• CPC Class Codes: H04L 27/001 using chaotic signals for secret or secure communication H04L9/001

Abstract

A multiple access communications data and information transport system and methodology for employing the noise present in any conduit as a carrier form using wireless chaotic waveform signals supported by nonlinear noise sustaining structures. The communications system utilizes digital devices and software embodying various algorithms designed to manipulate the nonlinear perturbations of any given conduit to establish a high bandwidth bidirectional, isochronous noise immune communications signal. Additionally, the system can be combined with any of a number of wireless or wireline communication methodologies to further enhance performance in terms of bandwidth, throughput, noise immunity, power consumption, cell size, and number of users without disturbing any concurrent signal traffic.

In further embodiments, the invention can be embedded into a plurality of user terminals or electronic devices linked to each other or to other services through both existing and emerging wireless and wired communications services.

Claims

1. A method of transmitting and receiving information data on a conduit comprising the steps of:

1) dividing the information into discrete chips;

2) approximating a nonlinear chaotic noise component at an input end of the conduit, comprising the further steps of;

2A) identifying a frequency;

2B) testing the chaotic noise response on the conduit to determine if a sustainable chaotic noise component is present for the discrete chips at the identified frequency; and

2C) repeating steps 2A and 2B until an aggregate bandwidth of frequencies having sustainable chaotic noise components is identified for a predetermined throughput capable of carrying the discrete chips at a predetermined error rate;

3) modulating the discrete chips onto the approximated noise component of step

     2) to obtain a modulated chaotic signal;

4) inputting the modulated chaotic signal onto the conduit;

5) approximating the nonlinear chaotic noise component at an output end of the conduit;

6) receiving the modulated chaotic signal from the conduit;

7) demodulating the approximated noise component of step

     5) from the modulated chaotic signal to obtain the discrete chips.

2. A receiver in communication with a transmitter over a communication conduit having chaotic noise, the transmitter having a transmitter subsystem that outputs noise codes in response to the chaotic noise of the conduit and having a modulator to modulate the noise codes with a desired signal, the receiver comprising:

an input to receive the modulated signals from the transmitter;

a receiver subsystem matched to the transmitter subsystem to output the noise codes in synch with the noise the transmitter subsystem in response to the chaotic noise of the conduit;

a demodulator, in electrical communication with the input and the receiver subsystem, to receive the noise codes from the receiver subsystem and demodulate the desired signal from the received modulated signals; and

an output, in electrical communication with the demodulator, to output the desired signal.

3. A receiver according to claim 2, further including:

a gain compensator, in electrical communication with the demodulator, to adjust the gain of the received modulated signals.

4. A receiver according to claim 2, wherein the desired signal and the noise codes are in digital format.

5. A receiver according to claim 2, further including:

a detector, in electrical communication with the receiver subsystem, to empirically determine the noise codes.

6. A communication system, for communicating an information signal through a space having noise characterized at any instant by a chaotic attractor comprising:

a transmitter to approximate the chaotic attractor for the noise using a predetermined algorithm, to combine the chaotic attractor with the information signal, and to transmit the combined signal into the space; and

a receiver, in electrical communication with the transmitter via the space, to also approximate the chaotic attractor for the noise using the same predetermined algorithm, to receive the combined signal, and to separate the information signal from the combined signal using the chaotic attractor approximated by the receiver, wherein the receiver and the transmitter approximate the limit cycle of each chaotic attractor and respectively combine and separate the information signal with only those chaotic attractors having no less than a predetermined approximated limit cycle.