Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing

• US 20040109572A1
• Filed: 12/04/2002
• Published: 06/10/2004
• Est. Priority Date: 12/04/2002
• Status: Active Grant

• Current Assignee: North South Holdings Incorporated (Spherix Incorporated)
• Original Assignee: M/A Com
• Inventors: Ahmed, Walid K.M.
• Granted Patent: US 7,298,854 B2
• Time in Patent Office: Days
• US Class Current: 381/94.1
• CPC Class Codes: H03F 2200/504 the supply voltage or current being continuously controlled by a controlling signal, e.g. the controlling signal of a transistor implemented as variable resistor in a supply path for, an IC-block showed amplifier
• CPC Class Codes: H03H 17/0202 Two or more dimensional filters; Filters for complex signals multidimensional convolutions G06F17/153

Abstract

Apparatus, methods and articles of manufacture are disclosed for modifying electromagnetic waves by reducing noise in those waves. A transfer function for a plurality of segments is derived through identifying a desired output parameter. That transfer function is then applied, via a plurality of filters or other devices, to a wave, in order to achieve said transfer function.

Claims

1. A method of applying a transfer function comprising:

obtaining one or more weighted signals;

identifying a desired transfer function for a sum of said weighted signals; and

,

applying a weighted value of said transfer function to each of said weighted signals.

2. A method of applying a transfer function comprising:

obtaining one or more weighted signals;

translating each of said one or more weighted signals into a first and second polar coordinate;

identifying a desired transfer function for a sum of said first and second polar coordinates of said weighted signals; and

,

applying a weighted value of said transfer function to each of said first and second polar coordinates of said weighted signals.

3. A method of applying a transfer function comprising:

determining a desired output wave parameter;

isolating an amplitude characteristic and a phase characteristic of an input wave;

deriving said transfer function from said desired output wave parameter; and

,

applying said transfer function to said amplitude characteristic of said wave.

4. A method as in claim 3 wherein said amplitude characteristic and said phase characteristic are combined so as to generate an output wave.

5. A method as in claim 3 wherein determining a desired output wave parameter further comprises determining an output signal noise parameter.

6. A method as in claim 5 wherein deriving said transfer function from said desired output wave parameter further comprises deriving an impulse response for a filter.

7. A method as in claim 6 wherein applying said transfer function to said amplitude characteristic of said wave further comprises applying said impulse response, via a filter, to said amplitude characteristic.

8. A method as in claim 7 wherein said filter is a low pass filter.

9. A method as in claim 7 wherein said filter is a 4^th order Butterworth filter.

10. An apparatus for applying a transfer function comprising:

means for obtaining one or more weighted signals;

means for identifying a desired transfer function for a sum of said weighted signals; and

,

means for applying a weighted value of said transfer function to each of said weighted signals.

11. An apparatus for applying a transfer function comprising:

means for obtaining one or more weighted signals;

means for translating each of said one or more weighted signals into a first and second polar coordinate;

means for identifying a desired transfer function for a sum of said first and second polar coordinates of said weighted signals; and

,

means for applying a weighted value of said transfer function to each of said first and second polar coordinates of said weighted signals.

12. An apparatus for applying a transfer function comprising:

means for determining a desired output wave parameter;

means for isolating an amplitude characteristic and a phase characteristic of an input wave;

means for deriving said transfer function from said desired output wave parameter; and

,

means for applying said transfer function to said amplitude characteristic of said wave.

13. An apparatus as in claim 12 wherein said amplitude characteristic and said phase characteristic are combined so as to generate an output wave.

14. An apparatus as in claim 12 wherein said means for determining a desired output wave parameter further comprises means for determining an output signal noise parameter.

15. An apparatus as in claim 14 wherein said means for deriving said transfer function from said desired output wave parameter further comprises deriving an impulse response for a filter.

16. An apparatus as in claim 15 wherein applying said transfer function to said amplitude characteristic of said wave further comprises applying said impulse response, via a filter, to said amplitude characteristic.

17. An apparatus as in claim 16 wherein said filter is a low pass filter.

18. An apparatus as in claim 16 wherein said filter is a 4^th order Butterworth filter.

19. An article of manufacture for noise reduction in electromagnetic signal processing comprising a transfer function, implemented in a plurality of filters, whereby said filters receive a series of weighted signals and implement said transfer function over said series of weighted signals.