Method and apparatus to transfer information

• US 20050020206A1
• Filed: 10/01/2002
• Published: 01/27/2005
• Est. Priority Date: 10/01/2002
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Leeper, David G., England, David G.
• Granted Patent: US 7,020,177 B2
• Time in Patent Office: Days
• US Class Current: 455/41.200
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 1/7172 Pulse shape in general H04L25/03834
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation

Abstract

Briefly, in accordance with an embodiment of the invention, a method and apparatus to transfer information is provided, wherein the method includes transferring information between at least two wireless devices using a waveform that includes a first sinusoidal signal and a second sinusoidal signal, wherein the second sinusoidal signal has more zero-crossings than the first signal and wherein a duration of the first sinusoidal signal is less than a duration of the second sinusoidal signal.

Claims

1. A method, comprising:

generating a waveform that comprises at least one monocycle signal and at least one non-monocycle signal.

2. The method of claim 1, wherein a duration of the monocycle signal is less than a duration of the non-monocycle signal, the monocycle signal has fewer zero-crossings than the non-monocycle signal, and an amplitude of the monocycle signal is greater than an amplitude of the non-monocycle signal.

3. The method of claim 1, wherein a duration of the non-monocycle signal is at least about two times greater than a duration of the monocycle signal.

4. The method of claim 1, further comprising:

transferring information at a first data rate using the at least one monocycle signal; and

transferring information at a second data rate using the at least one multicycle signal, wherein the first data rate is less than the second data rate.

5. The method of claim 1, further comprising:

using the at least one monocycle pulse to transfer a first type of information; and

using the at least one multicycle pulse to transfer a second type of information.

6. The method of claim 5, wherein the first type of information is control, timing, or security information and wherein the second type of information is user information.

7. The method of claim 5, wherein the first type of information is authentication information, authorization information, information to set up a communication path, information to tear down a communication path, synchronization information, information for multiple access coordination, information for data rate adaptation, or information to determine communication link quality between two devices and wherein the second type of information is spreadsheet information, word processing information, email information, web page information, a video file, an audio file, or a picture file.

8. The method of claim 1, further comprising:

providing a first communication channel to transfer information at a first data rate between a first device and a second device using the at least one monocycle signal; and

providing a second communication channel to transfer information at a second data rate between the first device and the second device using the at least one multicycle pulse.

9. The method of claim 8, further comprising:

determining communication link quality between the first device and the second device using the at least one monocycle signal; and

altering the second data rate if the communication link quality is below a predetermined level.

10. The method of claim 1, further comprising:

detecting the monocycle signal;

detecting the multicycle signal; and

processing the multicycle signal using the monocycle signal.

11. The method of claim 1, wherein generating further comprises generating the waveform that comprises the at least one monocycle signal and the at least one non-monocycle signal to transfer information from a first wireless device to a second wireless device.

12. The method of claim 11, further comprising synchronizing timing between the first wireless device and the second wireless device using the at least one monocycle signal.

13. The method of claim 11, further comprising:

determining a location of the second wireless device using the at least one monocycle signal.

14. The method of claim 11, further comprising:

determining a distance between the first wireless device and the second wireless device using the at least one monocycle signal.

15. A method, comprising:

transferring information between at least two wireless devices using a waveform that includes a first sinusoidal signal and a second sinusoidal signal, wherein the second sinusoidal signal has more zero-crossings than the first signal and wherein a duration of the first sinusoidal signal is less than a duration of the second sinusoidal signal.

16. The method of claim 15, further comprising:

transferring control information between the at least two wireless devices using the first sinusoidal signal; and

transferring user information between the at least two wireless devices using the second signal.

17. The method of claim 15, wherein a duration of the second sinusoidal signal is at least about two times greater than a duration of the first sinusoidal signal and wherein an amplitude of the first sinusoidal signal is greater than an amplitude of the second sinusoidal signal.

18. A method, comprising:

transferring information between at least two devices using a first signal, a second signal, and a third signal, wherein a duration of the first signal is less than a duration of the second signal and the duration of the second signal is approximately equal to the duration of the third signal and wherein the first signal has fewer zero-crossings than the second signal and the third signal.

19. The method of claim 18, wherein the at least two devices are wireless devices and further comprising:

transferring control information between the at least two devices using the first signal; and

transferring user information between the at least two devices using the second and third signals.

20. The method of claim 18, wherein a maximum amplitude of the first signal is greater than maximum amplitudes of the second and third signals.

21. An apparatus, comprising:

a circuit adapted to process a waveform that comprises a first pulsed signal, a second pulsed signal, and a third pulsed signal, wherein durations of the second and third pulsed signals are each greater than a duration of the first pulsed signal and wherein the second and third pulsed signals each have more zero-crossings than the first pulsed signal.

22. The apparatus of claim 21, wherein the circuit is a baseband circuit.

23. The apparatus of claim 21, wherein the circuit is a processor.

24. The apparatus of claim 21, wherein the circuit includes a first detector to detect the first pulsed signal and a second detector to detect the second and third pulsed signals.

25. The apparatus of claim 24, wherein the first detector includes a matched filter and wherein the second detector includes a matched filter.

26. The apparatus of claim 21, wherein an amplitude of the first pulsed signal is greater than amplitude of the second and third pulsed signals.

27. A system, comprising:

a wireless device adapted to wirelessly communicate information at a distance of less than about 10 meters, wherein the wireless device comprises;

a circuit adapted to process a waveform that comprises a first pulsed signal, a second pulsed signal, and a third pulsed signal, wherein durations of the second and third pulsed signals are each greater than a duration of the first pulsed signal and wherein the second and third pulsed signals each have more zero-crossings than the first pulsed signal.

28. The system of claim 27, wherein the circuit includes a first detector to detect the first pulsed signal and a second detector to detect the second and third pulsed signals.

29. The system of claim 27, wherein the wireless device includes an antenna having an output terminal coupled to an input terminal of the circuit, wherein the antenna is adapted to receive the waveform.