System, device, and method for improving radio performance

• US 9,985,671 B2
• Filed: 02/12/2016
• Issued: 05/29/2018
• Est. Priority Date: 01/15/2016
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Garrett, David C., Van Der Goes, Franciscus, Darabi, Hooman, Gomez, Ramon A.
• Primary Examiner(s): Bayard, Emmanuel
• Application Number:
  US15/043,056
• Publication Number:
  US 20170207803A1
• Time in Patent Office: 837 Days
• Field of Search: 375326, 375343-345, 375354-356, 375359
• CPC Class Codes: H04B 1/0007 wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 1/109 by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input

Abstract

A device includes circuitry configured to detect one or more properties of an image signal based on outputs from one or more (analog-to-digital converter) ADC configurations of a transceiver, determine a VCO frequency corresponding to an ADC sampling frequency independently from a carrier frequency, and control the VCO frequency of at least one of a transmitter or receiver based on the one or more properties of the image signal.

Claims

1. A device comprising:

circuitry configured to

detect one or more properties of an interference signal associated with a received signal based on toggling between a filtered signal path and an unfiltered signal path to an input of one or more (analog-to-digital converter) ADC configurations of a transceiver, the toggling between the filtered path and the unfiltered path occurring at least between packets included in the received signal,

determine a VCO frequency corresponding to an ADC sampling frequency independently from a carrier frequency, and

control the VCO frequency of at least one of a transmitter or receiver, based on the one or more properties of the interference signal, to shift a frequency of the interference signal to a filtered frequency.

2. The device of claim 1, wherein the one or more ADC configurations include a first ADC with a first sampling frequency and a second ADC with a second sampling frequency tuned to corresponding frequency bands.

3. The device of claim 2, wherein the first ADC and the second ADC are low-noise ADCs.

4. The device of claim 2, wherein the circuitry is further configured to correlate one or more interference signals output from the first ADC with one or more interference signals output from the second ADC located at a carrier frequency and at least one additional frequency.

5. The device of claim 2, wherein the circuitry is further configured to boost a desired signal by combining a first desired signal output from the first ADC with a second desired signal output from the second ADC.

6. The device of claim 1, wherein the toggling between the filtered signal path and the unfiltered signal path occurs at a predetermined fraction of a sampling frequency.

7. The device of claim 1, wherein the circuitry is further configured to detect the interference signal when a difference in an output from the ADC for the unfiltered signal path and the filtered signal path is greater than a predetermined threshold.

8. The device of claim 1, wherein the one or more ADC configurations include a first signal path with an attenuation filter connected to an input of a first ADC in parallel with a second signal path with a second ADC.

9. The device of claim 8, wherein a noise floor of the second ADC is greater than a noise floor of the first ADC.

10. The device of claim 8, wherein the attenuation filter is tuned to a predetermined frequency corresponding to an interference frequency.

11. The device of claim 8, wherein the circuitry is further configured to determine an amount of correlation between an output from the first ADC and the second ADC.

12. The device of claim 11, wherein the circuitry is further configured to modify the VCO frequency of the transmitter or the receiver in a case that:

the amount of correlation between the output of the first ADC and the output of the second ADC is greater than a first predetermined threshold; and

a difference in desired signal power between the output of the first ADC and the output of the second ADC is greater than a second predetermined threshold.

13. The device of claim 11, wherein the circuitry is further configured to modify the VCO frequency of the transmitter or the receiver in a case that:

the amount of correlation between the output of the first ADC and the output of the second ADC is less than a first predetermined threshold; and

a desired signal power output from the second ADC is greater than a second predetermined threshold.

14. The device of claim 1, wherein the circuitry is further configured to determine when the interference signal is associated with a local transmitter or a remote transmitter.

15. The device of claim 14, wherein the circuitry is further configured to modify the VCO frequency of the receiver when the interference signal is associated with the remote transmitter.

16. The device of claim 14, wherein the circuitry is further configured to modify the VCO frequency of the local transmitter when the interference signal is associated with the local transmitter.

17. A method comprising:

detecting one or more properties of an interference signal associated with a received signal based on toggling between a filtered signal path and an unfiltered signal path to of one or more ADC configurations of a transceiver, the toggling between the filtered path and the unfiltered path occurring at least between packets included in the received signal;

determining a VCO frequency corresponding to an ADC sampling frequency independently from a carrier frequency; and

controlling the VCO frequency of at least one of a transmitter or receiver, based on the one or more properties of the interference signal, to shift a frequency of the interference signal to a filtered frequency.

18. A non-transitory computer-readable medium encoded with computer-readable instructions that, when executed by processing circuitry, cause the processing circuitry to perform a method comprising:

detecting one or more properties of an interference signal associated with a received signal based on toggling between a filtered signal path and an unfiltered signal path to of one or more ADC configurations of a transceiver, the toggling between the filtered path and the unfiltered path occurring at least between packets included in the received signal;

determining a VCO frequency corresponding to an ADC sampling frequency independently from a carrier frequency; and

controlling the VCO frequency of at least one of a transmitter or receiver, based on the one or more properties of the interference signal, to shift a frequency of the interference signal to a filtered frequency.