Scalable ultra-wide band communication system

• US 7,474,705 B2
• Filed: 08/18/2003
• Issued: 01/06/2009
• Est. Priority Date: 08/16/2002
• Status: Expired due to Fees

• Current Assignee: Wisair Limited (Wisair Incorporated)
• Original Assignee: Wisair Limited (Wisair Incorporated)
• Inventors: Shor, Gadi, Yaish, David, Knobel, Yaron, Blumer, Benny, Zack, Rafi, Goldenberg, Sorin
• Primary Examiner(s): Tran, Khai
• Application Number:
  US10/642,886
• Publication Number:
  US 20040077306A1
• Time in Patent Office: 1,968 Days
• Field of Search: 375/130, 375/132, 375/138, 375/239, 375/295, 341/177, 341/178, 341180-182
• US Class Current: 375/295
• CPC Class Codes: H04B 1/7163 using impulse radio
• 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: H04K 3/25 based on characteristics of target signal or of transmission as countermeasure against surveillance H04K3/827, e.g. using direct sequence spread spectrum or fast frequency hopping spread spectrum techniques H04B1/69
• CPC Class Codes: H04K 3/827 using characteristics of target signal or of transmission as countermeasure against jamming H04K3/25, e.g. using direct sequence spread spectrum or fast frequency hopping spread spectrum techniques H04B1/69
• 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 multi-band ultra-wide band (UWB) communication methods and systems capable of adaptively and scalably supporting different applications with different requirements, as well as different desired or ideal properties relating to the communications. A method is provided for transmitting information using multi-band ultra-wide band transmission, including transmitting a signal over each of multiple frequency sub-bands, and allowing variation of at least one transmission parameter to facilitate trade-off between at least two of power consumption, energy collection, bit rate, performance, range, resistance to multiple access interference, and resistance to multipath interference and spectral flatness.

Claims

1. A method for transmitting information using ultra-wide band transmission, the method comprising:

sending, using orthogonal frequency division multiplexing, an ultra-wide band transmission comprising the information; and

allowing variation of pulse repetition frequency by removing multiple frequencies from a frequency hopping sequence.

2. The method of claim 1, comprising allowing variation of pulse repetition frequency to facilitate trade-off between at least two of power consumption, energy collection, bit rate, performance, range, resistance to multiple access interference, and resistance to multipath interference and spectral flatness.

3. The method of claim 1, wherein sending an ultra-wide band transmission comprises sending a burst symbol cycle transmission.

4. The method of claim 1, comprising maintaining an effective bit rate.

5. The method of claim 1 comprising reaching a desired level of bit and rate and performance by maintaining a combination of reduction of bit rate, coding and spreading.

6. The method of claim 1, comprising allowing variation of at least one transmission parameter in order to adapt to varying application requirements.

7. The method of claim 6, comprising automatically varying at least one transmission parameter in order to adapt to at least one of varying application requirements and environment requirements.

8. The method of claim 6, comprising using one or more algorithms to facilitate varying at least one transmission parameter in order to adapt to at least one of varying application requirements and environment requirements.

9. The method of claim 1, wherein sending an ultra-wide band transmission comprises using at least one of cyclic prefix transmission, and a combination of cyclic prefix transmission and zero padding.

10. The method of claim 1, comprising allowing variation in time spreading, while sending identical information multiple times in a single sub-band as well as in different sub-bands.

11. The method of claim 1, wherein pulse repetition frequency is varied according to at least one of a particular application and a particular environment.

12. The method of claim 1, comprising adaptively varying pulse repetition frequency according to at least one of varying application requirements and varying environmental requirements.

13. The method of claim 1, comprising adaptively varying pulse repetition frequency using one or more algorithms.

14. The method of claim 1, comprising adaptively varying pulse repetition frequency.

15. The method of claim 1, comprising reducing pulse repetition frequency to increase filter selectivity.

16. The method of claim 1, wherein reducing pulse repetition frequency to increase notch filter selectivity allows a chip implementation of one or more filters.

17. The method of claim 1, comprising varying pulse repetition frequency to reduce cross-band interference.

18. The method of claim 1, comprising reducing pulse repetition frequency to mitigate interference between two or more pico-nets that each use a different frequency hopping sequence.

19. The method of claim 1, comprising reducing pulse repetition frequency by a factor of two by removing one out of every two consecutive frequencies.

20. The method of claim 1, comprising reducing pulse repetition frequency by a factor of three by removing one out of every three consecutive frequencies.

21. The method of claim 1, comprising using different frequency hopping sequences for each of multiple pico-nets.

22. The method according to claim 1 further comprising setting pulse repetition frequency to mitigate inter-symbol interference.

23. A method for receiving information using ultra-wide band transmission, the method comprising:

receiving, using orthogonal frequency division multiplexing, an ultra-wide band transmission comprising the information by receiving signals transmitted over each of the plurality of frequency sub-bands; and

allowing variation of received pulsed repetition frequency being introduced by removing multiple frequencies from a frequency hopping sequence.

24. The method of claim 23, comprising allowing variation of received pulse repetition frequency to facilitate trade-off between at least two of power consumption, energy collection, bit rate, performance, range, resistance to multiple access interference, and resistance to multipath interference and spectral flatness.

25. The method of claim 24, comprising reducing power consumption by shutting off the receiver at least one of during off periods, during anticipated redundant symbols, and during anticipated noisy symbols.

26. The method of claim 23, comprising varying an ADC bit number based on variation in at least one of an application and environmental requirements.

27. The method of claim 23, wherein receiving an ultra-wide band transmission comprises receiving a burst symbol cycle transmission.

28. The method of claim 23, comprising receiving burst symbol cycle signals over each of the frequency sub-bands.

29. The method of claim 28, wherein receiving an ultra-wide band transmission comprises receiving a burst symbol cycle transmission.

30. A system for communicating information using ultra-wide band transmission and reception, the system comprising:

a transmitter for;

sending an ultra-wide band transmission comprising the information by transmitting, using orthogonal frequency division multiplexing, a signal and allowing variation of pulse repetition frequency by removing multiple frequencies from a frequency hopping sequence; and

a receiver for;

receiving an ultra-wide band transmission comprising the information by orthogonal frequency division multiplexing receiving signals.

31. The system of claim 30, adapted to allow variation of pulse repetition frequency to facilitate trade-off between at least two of power consumption, energy collection, bit rate, performance, range, resistance to multiple access interference, and resistance to multipath interference and spectral flatness.