Multi-band ultra-wide band communication method and system

• US 7,221,911 B2
• Filed: 06/25/2003
• Issued: 05/22/2007
• Est. Priority Date: 08/16/2002
• Status: Expired due to Fees

• Current Assignee: Wisair Limited (Wisair Incorporated)
• Original Assignee: Wisair Limited (Wisair Incorporated)
• Inventors: Krause, Amir, Wienberger, Erez, Knobel, Yaron, Shor, Gadi, Yaish, David, Goldenberg, Sorin
• Primary Examiner(s): Milord, Marceau
• Application Number:
  US10/603,372
• Publication Number:
  US 20040032354A1
• Time in Patent Office: 1,427 Days
• Field of Search: 375/130, 375/354, 375/239, 375/362, 375/342, 375/350, 375/295, 370/347, 370/342, 370/498
• US Class Current: 455/42
• 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: H04B 1/719 Interference-related aspects
• CPC Class Codes: H04L 1/004 by using forward error control H04L1/0618 takes precedence; coding, decoding or code conversion, for error detection or correction H03M13/00
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/06 the signals being represented by different frequencies combined with time-division multiplexing H04L5/26

Abstract

The present invention provides ultra-wide band communication systems and methods, including multi-band ultra-wide band communication systems and methods. Methods and systems are provided in which frequency sub-bands of an ultra-wide band spectrum are allocated for signal transmission. An ultra-wide band transmission including the information is sent, including sending a signal over each of the plurality of sub-bands.

Methods are further provided in which a first data signal containing information is converted into an encoded signal using an Inverse Fast Fourier Transform. The encoded signal is converted into an encoded ultra-wide band signal that can be pulsed or transmitted using burst symbol cycles. The encoded pulsed ultra-wide band signal is decoded using a Fast Fourier Transform to obtain the information.

Claims

1. A method for communicating information, comprising:

allocating, for signal transmission, each of a plurality of frequency sub-bands of an ultra-wide band spectrum;

sending an ultra-wide band transmission comprising the information over the ultra-wide band spectrum, comprising sending a signal over each of the plurality of sub-bands; and

receiving the ultra-wide band transmission comprising the information over the ultra-wide band spectrum, comprising receiving the signals, wherein sending the ultra-wide band signal comprises;

converting a first data signal containing information into one or more encoded signals using an Inverse Fast Fourier Transform; and

converting the encoded signal into an encoded ultra-wide band signal comprising burst symbol cycles.

2. The method of claim 1, wherein sending the signals comprises sending a different waveform over each sub-band.

3. The method of claim 1, wherein sending the signals comprises sending more than one waveform over a single sub-band at a given time.

4. The method of claim 1, wherein sending the ultra-wide band signal comprises transmitting over only a single one of the sub-bands at a given time.

5. The method of claim 1 wherein sending the ultra-wide band signal comprises switching between sub-bands.

6. The method of claim 5, wherein the switching is performed after each symbol is transmitted.

7. The method of claim 5, wherein the switching is performed after several symbols are transmitted.

8. The method of claim 5, wherein the switching is performed after one or more symbols are transmitted and an OFF period.

9. The method of claim 8, wherein the OFF period is used to reduce power consumption in the receiver and transmitter.

10. The method of claim 1, wherein the narrowband signal comprises an OFDM signal with a cyclic prefix.

11. The method of claim 1, wherein the narrowband signal comprises an OFDM signal with a gap and/or cyclic prefix.

12. The method of claim 1, comprising performing energy collecting and/or inter carrier interference mitigation by at least one of using parallel receivers, providing a gap between the OFDM symbols, cyclic prefix and using the tail of the symbol generated by multi-path in the channel.

13. A method for communicating information, the method comprising:

allocating, for signal transmission, each of a plurality of frequency sub-bands of an ultra-wide band spectrum;

sending an ultra-wide band transmission comprising the information over the ultra-wide band spectrum, comprising sending a signal over each of the plurality of sub-bands; and

receiving the ultra-wide band transmission comprising the information over the ultra-wide band spectrum, comprising receiving the signals, wherein sending the ultra-wide band signal comprises;

convening a first data signal containing information into one or more encoded signals using an Inverse Fast Fourier Transform; and

convening the encoded signal into an encoded pulsed ultra-wide band signal.

14. The method of claim 13, wherein sending the signals comprises sending a different waveform over each sub-band.

15. The method of claim 13 wherein sending the signals comprises sending more than one waveform over a single sub-band at a given time.

16. The method of claim 13, wherein sending the ultra-wide band signal comprises transmitting over only a single one of the sub-bands at a given time.

17. The method of claim 13 wherein sending the ultra-wide band signal comprises switching between sub-bands in which pulses are transmitted.

18. The method of claim 17, wherein the switching is performed after each symbol is transmitted.

19. The method of claim 17, wherein the switching is performed after several symbols are transmitted.

20. The method of claim 17, wherein the switching is performed after one or more symbols are transmitted and an OFF period.

21. The method of claim 20, wherein the OFF period is used to reduce power consumption in the receiver and transmitter.

22. The method of claim 13, wherein the narrowband signal comprises an OFDM signal with a cyclic prefix.

23. The method of claim 13, wherein the narrowband signal comprises an OFDM signal with a gap and/or cyclic prefix.

24. The method of claim 13, comprising performing energy collecting and/or inter carrier interference mitigation by at least one of using parallel receivers, providing a gap between the OFDM symbols, cyclic prefix and using the tail of the symbol generated by multi-path in the channel.

25. The method of claim 13, comprising determining a bandwidth of each of a plurality of bands used by the second signal by a narrow pulse width.