Performing a scan of diversity parameter differences

• US 20070081607A1
• Filed: 10/10/2005
• Published: 04/12/2007
• Est. Priority Date: 10/10/2005
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Magnolia Broadband Incorporated
• Inventors: Karmi, Yair, Sun, Wei, Kludt, Kenneth, Harel, Haim
• Granted Patent: US 7,746,946 B2
• Time in Patent Office: Days
• US Class Current: 375/267
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

Modifying a signal according to a diversity parameter adjustment includes accessing scan parameter values, where a scan parameter describes a scan process. The scan parameter values include diversity parameter vectors, where a diversity parameter vector has a diversity parameter value for each of one or more diversity parameters. The scan process is performed by repeating the following for each diversity parameter vector: modifying a signal according to the diversity parameter values of the diversity parameter vector, where the signal is transmitted from a modifying communication device to a feedback communication device; and receiving a feedback signal reflecting feedback information describing the signal as received by the feedback communication device.

Claims

1. A method for modifying a signal according to a diversity parameter adjustment, comprising:

accessing a plurality of scan parameter values for a plurality of scan parameters, a scan parameter describing a scan process, the plurality of scan parameter values comprising a plurality of diversity parameter vectors, a diversity parameter vector comprising a diversity parameter value for each of one or more diversity parameters; and

performing the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors;

modifying a signal according to the diversity parameter values of the each diversity parameter vector, the signal transmitted from a modifying communication device to a feedback communication device; and

receiving a feedback signal reflecting feedback information describing the signal as received by the feedback communication device.

2. The method of claim 1, wherein performing the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors further comprises:

collecting a measurement from a feedback signal reflecting the feedback information describing the signal modified according to the diversity parameter values of the each diversity parameter vector.

3. The method of claim 1, further comprising:

identifying a range of diversity parameter values that yields a higher signal quality; and

modifying the signal according to the diversity parameter values within the identified range.

4. The method of claim 1, further comprising:

identifying one or more optimal diversity parameter values from the feedback information; and

modifying the signal according to the one or more optimal diversity parameter values during an interval between the scan and a next scan.

5. The method of claim 1, further comprising:

identifying one or more prospective diversity parameter values from the feedback information;

establishing a next scan parameter value for a scan parameter of the plurality of parameters in accordance with the one or more prospective diversity parameter values; and

replacing the scan parameter value with the next scan parameter value.

6. The method of claim 1, further comprising:

identifying one or more optimal diversity parameter values from the feedback information; and

utilizing the one or more optimal diversity parameter values in a diversity control technique.

7. A system for modifying a signal according to a diversity parameter adjustment, comprising:

a memory operable to store a plurality of scan parameter values for a plurality of scan parameters, a scan parameter describing a scan process, the plurality of scan parameter values comprising a plurality of diversity parameter vectors, a diversity parameter vector comprising a diversity parameter value for each of one or more diversity parameters; and

a processor coupled to the memory and operable to perform the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors;

modifying a signal according to the diversity parameter values of the each diversity parameter vector, the signal transmitted from a modifying communication device to a feedback communication device; and

receiving a feedback signal reflecting feedback information describing the signal as received by the feedback communication device.

8. The system of claim 7, the processor further operable to perform the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors by:

collecting a measurement from a feedback signal reflecting the feedback information describing the signal modified according to the diversity parameter values of the each diversity parameter vector.

9. The system of claim 7, the processor further operable to:

identify a range of diversity parameter values that yields a higher signal quality; and

modify the signal according to the diversity parameter values within the identified range.

10. The system of claim 7, the processor further operable to:

identify one or more optimal diversity parameter values from the feedback information; and

modify the signal according to the one or more optimal diversity parameter values during an interval between the scan and a next scan.

11. The system of claim 7, the processor further operable to:

identify one or more prospective diversity parameter values from the feedback information;

establish a next scan parameter value for a scan parameter of the plurality of parameters in accordance with the one or more prospective diversity parameter values; and

replace the scan parameter value with the next scan parameter value.

12. The system of claim 7, the processor further operable to:

identify one or more optimal diversity parameter values from the feedback information; and

utilize the one or more optimal diversity parameter values in a diversity control technique.

13. Logic for modifying a signal according to a diversity parameter adjustment, the logic embodied in a medium and operable to:

access a plurality of scan parameter values for a plurality of scan parameters, a scan parameter describing a scan process, the plurality of scan parameter values comprising a plurality of diversity parameter vectors, a diversity parameter vector comprising a diversity parameter value for each of one or more diversity parameters; and

perform the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors;

modify a signal according to the diversity parameter values of the each diversity parameter vector, the signal transmitted from a modifying communication device to a feedback communication device; and

receive a feedback signal reflecting feedback information describing the signal as received by the feedback communication device.

14. The logic of claim 13, operable to perform the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors by:

collecting a measurement from a feedback signal reflecting the feedback information describing the signal modified according to the diversity parameter values of the each diversity parameter vector.

15. The logic of claim 13, further operable to:

identify a range of diversity parameter values that yields a higher signal quality; and

modify the signal according to the diversity parameter values within the identified range.

16. The logic of claim 13, further operable to:

identify one or more optimal diversity parameter values from the feedback information; and

modify the signal according to the one or more optimal diversity parameter values during an interval between the scan and a next scan.

17. The logic of claim 13, further operable to:

identify one or more prospective diversity parameter values from the feedback information;

establish a next scan parameter value for a scan parameter of the plurality of parameters in accordance with the one or more prospective diversity parameter values; and

replace the scan parameter value with the next scan parameter value.

18. The logic of claim 13, further operable to:

identify one or more optimal diversity parameter values from the feedback information; and

utilize the one or more optimal diversity parameter values in a diversity control technique.

19. A system for modifying a signal according to a diversity parameter adjustment, comprising:

means for accessing a plurality of scan parameter values for a plurality of scan parameters, a scan parameter describing a scan process, the plurality of scan parameter values comprising a plurality of diversity parameter vectors, a diversity parameter vector comprising a diversity parameter value for each of one or more diversity parameters; and

means for performing the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors;

modifying a signal according to the diversity parameter values of the each diversity parameter vector, the signal transmitted from a modifying communication device to a feedback communication device; and

receiving a feedback signal reflecting feedback information describing the signal as received by the feedback communication device.

20. A method for modifying a signal according to a diversity parameter adjustment, comprising:

accessing a plurality of scan parameter values for a plurality of scan parameters, a scan parameter describing a scan process, the plurality of scan parameter values comprising a plurality of diversity parameter vectors, a diversity parameter vector comprising a diversity parameter value for each of one or more diversity parameters;

performing the scan process by repeating the following for each diversity parameter vector of the plurality of diversity parameter vectors;

modifying a signal according to the diversity parameter values of the each diversity parameter vector, the signal transmitted from a modifying communication device to a feedback communication device;

receiving a feedback signal reflecting feedback information describing the signal as received by the feedback communication device; and

collecting a measurement from a feedback signal reflecting the feedback information describing the signal modified according to the diversity parameter values of the each diversity parameter vector;

identifying a range of diversity parameter values that yields a higher signal quality;

modifying the signal according to the diversity parameter values within the identified range;

identifying one or more prospective diversity parameter values from the feedback information;

establishing a next scan parameter value for a scan parameter of the plurality of parameters in accordance with the one or more prospective diversity parameter values;

replacing the scan parameter value with the next scan parameter value;

identifying one or more optimal diversity parameter values from the feedback information;

modifying the signal according to the one or more optimal diversity parameter values during an interval between the scan and a next scan; and

utilizing the one or more optimal diversity parameter values in a diversity control technique.