Method and apparatus reducing discrete components of repetitive ultra wideband signals

• US 20040156504A1
• Filed: 12/16/2003
• Published: 08/12/2004
• Est. Priority Date: 12/16/2002
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Mo, Shaomin Samuel, Gelman, Alexander G.
• Application Number:
  US10/737,518
• Publication Number:
  US 20040156504A1
• Time in Patent Office: Days
• US Class Current: 380/210
• CPC Class Codes: H04B 1/71632 Signal aspects H04B1/7172 and H04B1/7176 take precedence
• CPC Class Codes: H04B 1/719 Interference-related aspects

Abstract

Methods and apparatus for reducing discrete components of an Ultra Wideband (UWB) signal that includes source data having a repetitive component are disclosed. The discrete components are reduced by scrambling at least a portion of the repetitive component of the source data, inverting the source data according to a predetermined inverting function, and preparing the scrambled and inverted source data for transmission.

Claims

1. A signal processing method for reducing discrete components of an Ultra Wideband signal that includes source data having a repetitive component, the method comprising the steps of:

scrambling at least a portion of the repetitive component of the source data;

inverting portions of the source data including at least portions of the repetitive component according to a predetermined inverting function; and

preparing the scrambled and inverted source data for transmission.

2. The method of claim 1, wherein the source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverting step comprises the step of:

selectively inverting symbols of the sync words according to the predetermined inverting function.

3. The method of claim 1, wherein the source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverting step comprises the step of:

selectively inverting pulses of the sync words according to the predetermined inverting function.

4. The method of claim 1, wherein the source data includes frames and the inverting step comprises the step of:

selectively inverting the frames according to the predetermined inverting function.

5. The method of claim 1, wherein the inverting step comprises the step of:

selectively inverting the source data using a set of evenly distributed binary numbers.

6. The method of claim 1, wherein the source data includes words and wherein the scrambling step comprises the step of:

scrambling words of the repetitive data with a set of scramble words according to a predetermined scrambling function.

7. A signal processing system for reducing discrete components of an Ultra Wideband signal that includes source data having a repetitive component, the system comprising:

means for scrambling at least a portion of the repetitive component of the source data;

means for inverting portions of the source data including at least portions of the repetitive component according to a predetermined inverting function; and

means for preparing the scrambled and inverted source data for transmission.

8. The system of claim 7, wherein the source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverting means comprises:

means for selectively inverting symbols of the sync words according to the predetermined inverting function.

9. The system of claim 7, wherein the source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverting means comprises:

means for selectively inverting pulses of the sync words according to the predetermined inverting function.

10. The system of claim 7, wherein the source data includes frames and the inverting means comprises:

means for selectively inverting the frames according to the predetermined inverting function.

11. The system of claim 7, wherein the inverting means comprises:

means for selectively inverting the source data using a set of evenly distributed binary numbers.

12. The system of claim 7, wherein the source data includes words and wherein the scrambling means comprises:

means for scrambling words of the repetitive data with a set of scramble words according to a predetermined scrambling function.

13. A signal processing apparatus for reducing discrete components of an Ultra Wideband (UWB) signal that includes UWB source data having a repetitive component, the apparatus comprising:

a scrambler configured to receive the UWB source data and scramble at least a portion of the repetitive component;

an inverter coupled to the scrambler, the inverter configured to invert portions of the scrambled UWB source data according to a predetermined inverting function; and

a transmitter coupled to the inverter, the transmitter configured to transmit the scrambled and inverted UWB source data.

14. The apparatus of claim 13, wherein the UWB source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverter selectively inverts symbols of the sync words according to the predetermined inverting function.

15. The apparatus of claim 13, wherein the UWB source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverter selectively inverts pulses of the sync words according to the predetermined inverting function.

16. The apparatus of claim 13, wherein the UWB source data includes frames and the inverter selectively inverts the frames according to the predetermined inverting function.

17. The apparatus of claim 13, wherein the inverter selectively inverts the source data using a set of evenly distributed binary numbers.

18. The apparatus of claim 13, wherein the source data includes words and wherein the scrambler scrambles words of the repetitive data with a set of scramble words according to a predetermined scrambling function.

19. A computer readable medium including software that is configured to control a general purpose computer to implement an Ultra Wideband signal processing method embodied in a computer readable medium for reducing discrete components of an Ultra Wideband signal that includes source data having a repetitive component, the processing method including the steps of:

scrambling at least a portion of the repetitive component of the source data;

inverting portions of the source data including at least portions of the repetitive component according to a predetermined inverting function; and

preparing the scrambled and inverted source data for transmission.

20. The computer implemented method of claim 19, wherein the source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverting step for implementation by the general purpose computer comprises the step of:

selectively inverting symbols of the sync words according to the predetermined inverting function.

21. The computer implemented method of claim 19, wherein the source data includes symbols made up of pulses and the repetitive data includes sync words and wherein the inverting step for implementation by the general purpose computer comprises the step of:

selectively inverting pulses of the sync words according to the predetermined inverting function.

22. The computer implemented method of claim 19, wherein the source data includes frames and the inverting step for implementation by the general purpose computer comprises the step of:

selectively inverting the frames according to the predetermined inverting function.

23. The computer implemented method of claim 19, wherein the inverting step for implementation by the general purpose computer comprises the step of:

selectively inverting the source data using a set of evenly distributed binary numbers.

24. The computer implemented method of claim 19, wherein the source data includes words and wherein the scrambling step for implementation by the general purpose computer comprises the step of:

scrambling words of the repetitive data with a set of scramble words according to a predetermined scrambling function.

25. A signal processing method for reducing discrete components of a transmitted Ultra Wideband signal that includes source data having a repetitive component, the method comprising the steps of:

defining a set of scramble words to scramble the repetitive data within the source data;

scrambling at least a portion of the repetitive component of the source data with the set of scramble words according to a predetermined scrambling function;

inverting portions of the scrambled source data according to a predetermined inverting function; and

transmitting the scrambled and inverted source data.

26. The method of claim 25, further comprising the steps of:

receiving the scrambled and inverted source data;

reinverting the inverted portions of the scrambled and inverted source data according to the predetermined inverting function; and

descrambling the scrambled source data according to a predetermined descrambling function based on the predetermined scrambling function to obtain the source data.

27. The method of claim 26, further comprising the steps of:

synchronizing the received scrambled and inverted source data for reinversion and descrambling using the predetermined inverting and descrambling functions.