System and method for multi-band ultra-wide band signal generators

• US 20040131130A1
• Filed: 08/18/2003
• Published: 07/08/2004
• Est. Priority Date: 08/16/2002
• Status: Active Grant

• Current Assignee: Wisair Limited (Wisair Incorporated)
• Original Assignee: Wisair Limited (Wisair Incorporated)
• Inventors: Rubin, Zeev, Shor, Gadi, Meshulam, David, Blumer, Benny, Yaish, David, Knobel, Yaron
• Granted Patent: US 7,539,271 B2
• Time in Patent Office: Days
• US Class Current: 375/308
• 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: 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 2027/0051 Harmonic tracking
• CPC Class Codes: H04L 27/206 using a pair of orthogonal carriers, e.g. quadrature carriers
• 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 systems and methods relating to ultra-wide band communications. A method is provided for transmitting information using ultra-wide band transmission. The method includes allocating, for signal transmission, each of a plurality of frequency sub-bands. The method further includes sending an ultra-wide band transmission comprising the information by transmitting a burst symbol cycle signal over each of the plurality of frequency sub-bands.

Claims

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

allocating, for signal transmission, each of a plurality of frequency sub-bands; and

sending an ultra-wide band transmission comprising the information by transmitting a burst symbol cycle signal over each of the plurality of frequency sub-bands.

2. The method of claim 1, comprising sending at least two of the burst symbol cycle signals serially.

3. The method of claim 1, comprising sending at least two of the burst symbol cycles in parallel.

4. The method of claim 1, comprising switching off power to at least one circuit during OFF periods of a transmission to decrease power consumption.

5. The method of claim 4, comprising maintaining signal frequency and phase from an end of an ON period to a beginning of the following ON period.

6. The method of claim 4, comprising maintaining signal frequency from an end of an ON period to a beginning of the following ON period.

7. The method of claim 4, comprising utilizing at least one of an analog wave generator, digital wave generator, and a combination analog and digital wave generator.

8. A fast switching frequency generator for facilitating generation of a multi-band ultrawide band transmission, the generator comprising a circuit, the circuit comprising:

at least one voltage controlled oscillator;

at least one divider;

wherein the at least one voltage controlled oscillator is adapted for use in generating a signal of a particular center frequency, and wherein the at least one divider is adapted for use in facilitating generation of multiple transmission frequency bands of the multiband ultra-wide band transmission by outputting, from an input signal of a particular center frequency, signals of different frequency multiples of a step frequency.

9. The method of claim 8, comprising using QPSK modulation, and comprising multiplying an input signal with a data signal prior to generating signals of different frequency multiples of a step frequency.

10. A method for facilitating transmission of information using ultra-wide band transmission, the method comprising:

generating a first digital signal for use in an ultra-wide band transmission; and

substantially removing at least one harmonic from the first digital signal by subtracting, from the first digital signal, a second digital signal that is a delayed form of the first digital signal, to produce a third digital signal that is of substantially the same frequency as the first digital signal but that substantially does not include at least one harmonic included in the first digital signal.

11. The method of claim 10, wherein the subtracting comprises using differential inputs to a switch mixer.

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

allocating, for signal transmission, each of a plurality of frequency sub-bands; and

sending an ultra-wide band transmission comprising the information by transmitting a signal over each of the plurality of frequency sub-bands;

wherein phase continuity is maintained by;

dividing each of the frequency sub-bands into a plurality of segments; and

cycling transmission between segments of each of the sub-bands.

13. The method of claim 12, comprising cycling transmission between segments of each of the frequency sub-bands to produce a signal of substantially uninterrupted phase.

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

allocating, for signal transmission, each of a plurality of frequency sub-bands; and

sending an ultra-wide band transmission comprising the information by transmitting a signal over each of the plurality of frequency sub-bands, comprising producing at least one analog carrier wave of a frequency sub-band using outputs from a plurality of digital to analog converters.

15. The method of claim 14, wherein producing the at least one analog carrier wave comprises each of the digital to analog converters outputting a portion of the analog carrier wave based on an input bit, and comprises cycling through input values to produce consecutive segments of the analog carrier wave.

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

allocating, for signal transmission, each of a plurality of frequency sub-bands; and

sending an ultra-wide band transmission comprising the information by transmitting a signal over each of the plurality of frequency sub-bands, comprising using a sine wave envelope to reduce side lobes in at least one carrier frequency, comprising multiplying a signal by a sine wave of a lower frequency than the carrier frequency.

17. The method of claim 16, comprising varying pulse bandwidth while pulse repetition frequency remains constant, to facilitate control of signal spectrum characteristics and receiver selectivity.

18. A method for facilitating transmission of information using ultra-wide band transmission, the method comprising:

generating at least one carrier wave for use in an ultra-wide band transmission; and

isolating a single monocycle from the carrier wave by;

producing a first signal that is a delayed form of the carrier wave; and

combining the carrier wave with the first signal to isolate a single monocycle.

19. The method of claim 18, comprising producing a first signal that is a delayed form of the carrier wave by at least one of multiplying the carrier wave by a clock signal and switching the carrier wave using a mixer.

20. The method of claim 18, comprising feeding a signal to a stub for producing a first signal that is a delayed form of the carrier wave.

21. A method for facilitating transmission of information using ultra-wide band transmission, the method comprising:

generating a narrow-band pulse signal for use in an ultra-wide band transmission, comprising;

generating a first pulse signal;

producing a second pulse signal that is a delayed form of the first pulse signal; and

using a differential amplifier, subtracting the first pulse signal from the second pulse signal to produce the narrow-band pulse signal.

22. The method of claim 21, comprising using a polarity generator to determine which of the first and second pulse signals is to be the positive input and which of the first and second pulses is to be the negative input to the differential amplifier, based on information to be transmitted.

23. A method for facilitating transmission of information, the method comprising:

generating an ultra-wide band signal, comprising;

generating a first ultra-wide band carrier signal;

combining the first carrier signal with a sine wave envelope to generate a first combined signal with reduced side lobes relative to the first carrier signal;

combining the first combined signal with an information signal to generate a second combined signal; and

transmitting the second combined signal as at least part of a multi-band ultra-wide band transmission.

24. A method for facilitating transmission of information, the method comprising:

generating an ultra-wide band signal, comprising;

combining an information signal with a sine wave envelope to generate a first combined signal;

combining the first combined signal with a generated carrier signal to generate a second combined signal with reduced side lobes relative to the generated carrier signal; and

transmitting the second combined signal as at least part of a multi-band ultra-wide band transmission.