Carrierless ultra wideband wireless signals for conveying data

• US 6,909,877 B2
• Filed: 11/18/2002
• Issued: 06/21/2005
• Est. Priority Date: 12/12/1997
• Status: Expired due to Term

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Rofheart, Martin, McCorkle, John W., Miller, Timothy R.
• Primary Examiner(s): Trinh, Sonny
• Application Number:
  US10/295,858
• Publication Number:
  US 20030162498A1
• Time in Patent Office: 946 Days
• Field of Search: 455/41.2, 455/23, 455/118, 455/39, 455/62, 455/454, 455/91, 375/210, 375/264, 375280-283, 375/271, 375/295, 375/256, 375/286, 370/351, 370/352
• US Class Current: 455/41.2
• CPC Class Codes: H04B 1/7172 Pulse shape in general H04L25/03834
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 27/0004 using wavelets

Abstract

A method for conveying application data via carrierless ultra wideband wireless signals, and signals embodied in a carrierless ultra wideband waveform. Application data is encoded into wavelets that are transmitted as a carrierless ultra wideband waveform. The carrierless ultra wideband waveform is received by an antenna, and the application data is decoded from the wavelets included in the waveform. The waveforms of the signals include wavelets that have a predetermined shape that is used to modulate the data. The signals may convey, for example, Web pages and executable programs between mobile devices. The signals are low power and can penetrate obstructions making them favorable for use with a wireless node of a network.

Claims

1. A method for conveying digital information with carrierless ultra wideband wireless signals, comprising:

encoding the digital information into wavelets each having predetermined shapes, the shapes being at least one of bi-phase modulated, quad-phase modulated, multilevel bi-phase modulated, and multilevel quad-phase modulated; and

transmitting a carrierless ultra wideband waveform via an antenna, the ultra wideband waveform including the wavelets;

wherein the multilevel bi-phase modulated shapes comprise a basic shape, an inverse of the basic shape, and a basic shape multipled in amplitude by an interger.

2. A method for conveying digital information with carrierless ultra wideband wireless signals, as recited in claim 1, wherein the shapes comprise pulses suitable for a pulse position modulation scheme.

3. A method for conveying digital information with carrierless ultra wideband wireless signals, as recited in claim 1, wherein the digital information comprises data bits.

4. A method for conveying digital information with carrierless ultra wideband wireless signals, as recited in claim 1, wherein the digital information comprises control data.

5. A method for conveying digital information with carrierless ultra wideband wireless signals, as recited in claim 1, wherein the basic shape is one of a Gaussian function and a sinusoidal function.

6. A method for conveying digital information with carrierless ultra wideband wireless signals, as recited in claim 1, wherein the method is implemented in an integrated circuit.

7. A method for conveying digital information in an ultra wideband wireless signal, comprising:

encoding the digital information into a plurality of signal wavelets; and

transmitting an ultra wideband waveform via an antenna, the ultra wideband waveform including the plurality of signal wavelets,

wherein the plurality of signal wavelets comprises a plurality of first wavelets having a first wavelet shape, and a plurality of second wavelets having a second wavelet shape.

8. A method for conveying digital information in an ultra wideband wireless signal, as recited in claim 7, wherein the second wavelet shape is equivalent to an inverted first wavelet shape.

9. A method for conveying digital information in an ultra wideband wireless signal, as recital in claim 7, wherein the first wavelet shape is one of a Gaussian function and a sinusoidal function.

10. A method for conveying digital information in an ultra wideband wireless signal, as recited in claim 7, wherein the plurality of signal wavelets further comprises a plurality of third wavelets having a third wavelet shape.

11. A method for conveying digital information in an ultra wideband wireless signal, as recited in claim 10,

wherein the second wavelet shape is equivalent to an inverted first wavelet shape, and

wherein the third wavelet shape is equal to the first wavelet shape multiplied in amplitude by an integer.

12. A method for conveying digital information in an ultra wideband wireless signal, as recited in claim 7, wherein a bit of the digital information is encoded into a plurality of the signal wavelets.

13. A method for conveying digital information in an ultra wideband wireless signal, as recited in claim 7, wherein the method is implemented in an integrated circuit.

14. A device for conveying digital information in an ultra wideband wireless signal, comprising:

an encoder configured to receive a data stream and to generate a plurality of state indicators representing bits in the data stream, each of the state indicators having one of M possible values, each of the M possible values corresponding to one of M different wavelet shapes;

a waveform generator configured to receive the plurality of state indicators and to generate a corresponding plurality of wavelets encoded according to the plurality of state indicators, each of the corresponding plurality of wavelets having one of the M different wavelet shapes;

a transmission path configured to transmit the plurality of wavelets as ultra wideband energy,

wherein M is an integer greater than one.

15. A device for conveying digital information in an ultra wideband wireless signal, as recited in claim 14, wherein the M different wavelet shapes include a first wavelet shape and a second wavelet shape equivalent to an inverted first wavelet shape.

16. A device for conveying digital information in an ultra wideband wireless signal, as recited in claim 15, wherein the first wavelet shape is one of a Gaussian function and a sinusoidal function.

17. A device for conveying digital information in an ultra wideband wireless signal, as recited in claim 15, wherein the M different wavelet shapes further includes a third wavelet shape equivalent to the first wavelet shape multiplied in amplitude by an integer.

18. A device for conveying digital information in an ultra wideband wireless signal, as recited in claim 14, wherein the transmission path comprises an ultra wideband antenna.