METHOD AND SYSTEM FOR DETECTING BLUETOOTH SIGNALS UTILIZING A WIDEBAND RECEIVER

• US 20100048136A1
• Filed: 10/26/2009
• Published: 02/25/2010
• Est. Priority Date: 10/30/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Hall, Steven Deane, Ibrahim, Brima Babatunde
• Granted Patent: US 8,190,388 B2
• Time in Patent Office: Days
• US Class Current: 455/41.300
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 1/715 Interference-related aspects

Abstract

Aspects of a method and system for detecting Bluetooth signals utilizing a wideband receiver are provided. In this regard, a portion of a frequency band may be scanned multiple times, where each scan comprises receiving signals present in the scanned portion of the frequency band. Based on results of a Fast Fourier Transform performed on the received signals, presence of one or more Bluetooth transmissions in the received signals may be detected. In instances that a Bluetooth transmission is detected, a type of the Bluetooth transmission may be determined based on a number of the scans in which the Bluetooth transmission was detected. In instances that a detected Bluetooth transmission is a page, a Bluetooth transceiver in the wireless communication device may be powered up and/or enter a page scanning mode. The scans may be performed by a wireless local area networking receiver within the wireless communication device.

Claims

1. A method for wireless communication, the method comprising:

performing by one or more processors and/or circuits in a wireless communication device;

scanning a portion of a frequency band to receive signals present within said portion of said frequency band;

detecting one or more Bluetooth transmission in said received signals based on results of a Fast Fourier Transform performed on said received signals; and

determining a type of said one or more detected Bluetooth transmission based on a number of times in which said one or more Bluetooth transmission was detected.

2. The method according to claim 1, wherein said portion of said frequency band is a wireless local area networking channel.

3. The method according to claim 1, comprising determining a Bluetooth channel associated with one or more detected Bluetooth transmission based on said results of said Fast Fourier Transform.

4. The method according to claim 1, comprising performing said Fast Fourier Transform when said energy of said received signals is greater than said threshold.

5. The method according to claim 1, comprising powering up a Bluetooth transmitter and/or receiver in said wireless communication device when said determined type of said one or more detected Bluetooth transmission is a page.

6. The method according to claim 1, comprising triggering a Bluetooth transmitter and/or receiver in said wireless communication device to enter a connection mode or page scanning mode when said determined type of said one or more detected Bluetooth transmission is a page.

7. The method according to claim 1, wherein said scanning is performed by a wireless local area networking receiver within said wireless communication device.

8. The method according to claim 7, wherein said wireless local area networking receiver is compliant with the IEEE 802.11 family of standards.

9. The method according to claim 1, comprising scanning said portion of said frequency band periodically.

10. The method according to claim 1, comprising scanning another portion of said frequency band during one or more pauses in said scanning.

11. A system for wireless communication, the system comprising:

one or more circuits and/or processors for use in a wireless communication device, wherein said one or more circuits and/or processors are operable to;

scan a portion of a frequency band to receive signals present within said portion of said frequency band;

detect one or more Bluetooth transmission in said received signals based on results of a Fast Fourier Transform performed on said received signals; and

determine a type of said one or more detected Bluetooth transmission based on a number of times in which said one or more Bluetooth transmission was detected.

12. The system according to claim 11, wherein said portion of said frequency band is a wireless local area networking channel.

13. The system according to claim 11, wherein said one or more circuits and/or processors are operable to determine a Bluetooth channel associated with one or more detected Bluetooth transmission based on said results of said Fast Fourier Transform.

14. The system according to claim 11, wherein said one or more circuits and/or processors are operable to perform said Fast Fourier Transform when said energy of said received signals received in said one of said plurality of sub-bands is greater than said threshold.

15. The system according to claim 11, wherein said one or more circuits and/or processors are operable to power up a Bluetooth transmitter and/or receiver in said wireless communication device when said determined type of said one or more detected Bluetooth transmission is a page.

16. The system according to claim 11, wherein said one or more circuits and/or processors are operable to triggering a Bluetooth transmitter and/or receiver in said wireless communication device to enter a connection mode or page scanning mode upon determining that said Bluetooth transmission was a page.

17. The system according to claim 11, wherein said scanning is performed by a wireless local area networking receiver within said wireless communication device.

18. The system according to claim 17, wherein said wireless local area networking receiver is compliant the IEEE 802.11 family of standards.

19. The system according to claim 11, wherein said one or more circuits and/or processors are operable to scan said portion of said frequency band periodically.

20. The system according to claim 11, wherein said one or more circuits and/or processors are operable to scan one or more other portions of said frequency band during one or more pauses in said scan of said portion of said frequency band.