System and method for transmitting ultrawide bandwidth signals

• US 20060251148A1
• Filed: 02/27/2004
• Published: 11/09/2006
• Est. Priority Date: 02/28/2003
• Status: Active Grant

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Welborn, Matthew L., McCorkle, John W., Huynh, Phuong T., Richards, Roberts D.
• Granted Patent: US 7,570,712 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04B 1/71632 Signal aspects H04B1/7172 and H04B1/7176 take precedence
• CPC Class Codes: H04B 1/71635 Transmitter aspects H04B1/7174 takes precedence
• CPC Class Codes: H04L 27/0004 using wavelets

Abstract

A method is provided for generating a multiple band ultrawide bandwidth signal. In this method, an ultrawide bandwidth devices provides a first reference signal having a first reference frequency, and a second reference signal having a second reference frequency that is different from the first reference frequency. The device generates a first ultrawide bandwidth signal based on the first reference signal, and a second ultrawide bandwidth signal based on the second reference signal, creating two separate frequency bands. These two signals can be generated form the same base clock signal, allowing for significantly simpler implementation and modification.

Claims

1. A method for generating a multiple band ultrawide bandwidth signal, comprising:

providing a first reference signal having a first reference frequency;

providing a second reference signal having a second reference frequency that is different from the first reference frequency;

generating a first ultrawide bandwidth signal based on the first reference signal; and

generating a second ultrawide bandwidth signal based on the second reference signal.

2. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the first reference signal has a first reference frequency that corresponds to a center frequency band for the first ultrawide bandwidth signal.

3. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the second reference signal sets a center frequency for the second ultrawide bandwidth signal.

4. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the first reference frequency is one of between 300 MHz and 9.2 GHz.

5. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, further comprising:

providing third through Nth reference signals having, third through Nth reference frequencies, respectively; and

generating third through Nth ultrawide bandwidth signals based on the third through Nth reference signals, respectively,

wherein all of the third through Nth reference frequencies are different from each other, and

wherein N is an integer greater than three.

6. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the second reference signal is derived from the first reference signal.

7. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the first and second reference signals are both derived from a third reference signal.

8. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the first reference signal is multiplied by N to provide the second reference signal, and wherein N is one of an integer greater than 1 or an integer fraction less than 1.

9. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the first ultrawide bandwidth signal and the second ultrawide bandwidth signal are encoded using the same code word.

10. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, wherein the first ultrawide bandwidth signal and the second ultrawide bandwidth signal are encoded using different code words.

11. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, executed in an integrated circuit.

12. A method for generating a multiple band ultrawide bandwidth signal, as recited in claim 1, executed in an ultrawide bandwidth transceiver.

13. A device for transmitting ultrawide bandwidth signals, comprising:

a first reference frequency generator configured to generate a first reference signal having a first reference frequency;

a second reference frequency generator configured to generate a second reference signal having a second reference frequency that is different from the first reference frequency;

a bit source configured to selectively receive one of the first reference signal and the second reference signal, and to generate one of a first ultrawide bandwidth signal based on the first reference signal and a second ultrawide bandwidth signal based on the second reference signal; and

an antenna configured to transmit one of the first ultrawide bandwidth signal and the second ultrawide bandwidth signal, as generated by the bit source.

14. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, further comprising:

a first code word generator configured to generate a first code word; and

a first mixer configured to mix the first code word with bits from the first ultrawide bandwidth signal.

15. A device for transmitting ultrawide bandwidth signals, as recited in claim 14, further comprising:

a second code word generator configured to generate a second code word; and

a second mixer configured to mix the second code word with bits from the second ultrawide bandwidth signal.

16. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, wherein the second reference signal is derived from the first reference signal.

17. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, wherein the first reference signal is divided by N to provide the second reference signal, where N is an integer greater than 1.

18. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, wherein the first reference signal sets a center frequency for the first signal.

19. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, wherein the second reference signal sets a center frequency for the second ultrawide bandwidth signal.

20. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, wherein the first reference frequency is between 300 MHz and 9.2 GHz.

21. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, further comprising:

a third reference frequency generator configured to generate a third reference signal having a third reference frequency that is different from the first and second reference frequencies,

wherein the bit source is configured to selectively receive one of the first reference signal, the second reference signal, and the third reference signal, and to selectively provide one of the first ultrawide bandwidth signal, the second ultrawide bandwidth signal, and a third ultrawide bandwidth signal based on the third reference signal, and

wherein the antenna is configured to transmit one of the first ultrawide bandwidth signal, the second ultrawide bandwidth signal, and the third ultrawide bandwidth signal.

22. A device for transmitting ultrawide bandwidth signals, as recited in claim 13, further comprising:

third through Nth reference frequency generators configured to generate third through Nth reference signals, respectively, the third through Nth reference signals having third through Nth reference frequencies,

wherein all of the third through Nth reference frequencies are different from each other,

wherein the bit source is configured to selectively receive one of the first reference signal, the second reference signal, and the third reference signal, and to selectively provide one of the first ultrawide bandwidth signal, the second ultrawide bandwidth signal, and a third ultrawide bandwidth signal based on the third reference signal, and

wherein the antenna is configured to transmit one of the first ultrawide bandwidth signal, the second ultrawide bandwidth signal, and the third ultrawide bandwidth signal.

23. A method for generating an ultrawide bandwidth signal, comprising:

providing a first reference signal having a first reference frequency;

providing a second reference signal having a second reference frequency that is different from the first reference frequency;

selectively generating one of a first ultrawide bandwidth signal based on the first reference signal, a second ultrawide bandwidth signal based on the second reference signal, and both the first ultrawide bandwidth signal and the second ultrawide bandwidth signal.