Adjustable chaotic signal generator using pulse modulation for ultra wideband (UWB) communications and chaotic signal generating method thereof

• US 7,830,214 B2
• Filed: 11/17/2006
• Issued: 11/09/2010
• Est. Priority Date: 11/29/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Oleg, Popov, Lee, Seong-soo, Han, Sang-min
• Primary Examiner(s): KINKEAD, ARNOLD M
• Application Number:
  US11/600,864
• Publication Number:
  US 20070121945A1
• Time in Patent Office: 1,453 Days
• Field of Search: 331/78, 332/117, 327/131, 327/291, 327/355, 327/361
• US Class Current: 331/78
• CPC Class Codes: H04B 1/71632 Signal aspects H04B1/7172 and H04B1/7176 take precedence
• CPC Class Codes: H04B 1/7174 Pulse generation in general H04L25/03834
• CPC Class Codes: H04L 27/001 using chaotic signals for secret or secure communication H04L9/001
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

An adjustable chaotic signal generator using pulse modulation for UWB communications, and a chaotic signal generating method thereof are provided. The chaotic signal generator for UWB communications includes a plurality of pulse generators which generates pulses of different frequencies; at least one combiner which combines the pulses generated at the pulse generators; and a plurality of local oscillators which receives signals from the combiner, respectively, and generates a chaotic signal by increasing the received signals to different frequency bands. Accordingly, a plurality of users can conduct the radio communications in a specific wireless communication range at the same time by generating the chaotic signal that can be split to the multiple channels. Also, the chaotic signal generator is structured using devices integratable on an integrated circuit.

Claims

1. A chaotic signal generator for ultra wideband (UWB) communications, comprising:

a plurality of pulse generators which generates pulses of different frequencies;

at least one combiner which combines the pulses generated at the plurality of pulse generators; and

a plurality of local oscillators which receives signals output from the at least one combiner, and generates chaotic signals by increasing frequencies of the received signals to different frequency bands.

2. The chaotic signal generator as in claim 1, wherein the frequencies of the pulses generated at the plurality of pulse generators are determined such that the pulses from the plurality of pulse generators are arranged at random after passing through the at least one combiner.

3. The chaotic signal generator as in claim 1, wherein the at least one combiner comprises an OR gate.

4. The chaotic signal generator as in claim 1, wherein the at least one combiner comprises a plurality of combiners which are provided for each of the local oscillators.

5. The chaotic signal generator as in claim 1, further comprising:

a power divider which divides the signals output by the at least one combiner for input into the local oscillators,

wherein the at least one combiner comprises only one combiner.

6. The chaotic signal generator as in claim 1, wherein a number of the plurality of local oscillators is determined according to a frequency bandwidth of the chaotic signals output from the plurality of local oscillators.

7. The chaotic signal generator as in claim 1, wherein a number of the plurality of local oscillators is determined according to a frequency bandwidth of each of channels.

8. The chaotic signal generator as in claim 1, wherein a number of the plurality of local oscillators is determined according to a number of channels.

9. The chaotic signal generator as in claim 1, wherein the plurality of local oscillators comprises a voltage controlled oscillator (VCO).

10. The chaotic signal generator as in claim 1, further comprising:

a power combiner which generates an UWB chaotic signal by combining the chaotic signals generated at the plurality of local oscillators.

11. The chaotic signal generator as in claim 10, further comprising:

a filter which filters and only outputs a chaotic signal of a preset frequency band from the UWB chaotic signal output from the power combiner.

12. The chaotic signal generator as in claim 11, wherein the filter is a tunable band pass filter (BPF) which changes a filtered frequency band.

13. A chaotic signal generator for ultra wideband (UWB) communications, comprising:

a plurality of pulse generators which generates pulses having different frequencies;

at last one combiner which combines the pulses generated at the plurality of pulse generators;

a plurality of local oscillators which receives signals output from the at least one combiner and increases frequencies of the received signals to different frequency bands;

a power combiner which generates an UWB chaotic signal by combining signals generated at the plurality of local oscillators; and

a filter which filters and only outputs a chaotic signal of a preset frequency band from the UWB chaotic signal output from the power combiner.

14. A chaotic signal generating method for ultra wideband (UWB) communications, comprising:

generating a plurality of pulses of different frequencies;

combining the generated plurality of pulses to generate a combined signal;

increasing frequencies of the combined signal to different frequency bands; and

generating an UWB chaotic signal by combining signals increased to the different frequency bands.

15. The chaotic signal generating method as in claim 14, wherein the frequencies of the pulses are determined such that the plurality of pulses are randomly arranged in the combined signal.

16. The chaotic signal generating method as in claim 14, further comprising:

dividing a power of the combined signal to plural powers.

17. The chaotic signal generating method as in claim 14, further comprising:

filtering and outputting only a chaotic signal of a preset frequency band from the UWB chaotic signal.