MULTIPLE FREQUENCY BAND INFORMATION SIGNAL FREQUENCY BAND CONVERSION

• US 20100261501A1
• Filed: 07/21/2009
• Published: 10/14/2010
• Est. Priority Date: 04/09/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Ibrahim, Brima B., Behzad, Arya Reza, Rosmann, David, Walley, John, Erceg, Vinko, Karaoguz, Jeyhan
• Granted Patent: US 8,204,537 B2
• Time in Patent Office: Days
• US Class Current: 455/552.100
• CPC Class Codes: H04B 1/001 Channel filtering, i.e. selecting a frequency channel within the SDR system multiplexing of multicarrier modulation signals being represented by different frequencies H04L5/06; multiplexing of multicarrier modulation signals H04L5/023
• CPC Class Codes: H04B 1/0082 with a common local oscillator for more than one band
• CPC Class Codes: H04B 1/18 Input circuits, e.g. for coupling to an antenna or a transmission line coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A wireless device includes processing circuitry and a Radio Frequency (RF) receiver section. The processing circuitry determines a set of information signals for receipt, the set of information signals carried by a RF Multiple Frequency Bands Multiple Standards (MFBMS) signal having a plurality of information signal frequency bands. The processing circuitry determines a shift frequency based upon the determination. the RF receiver section receives the RF MFBMS signal and down-converts the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal. The processing circuitry then extracts data from the set of information signals of the BB/IF MFBMS signal.

Claims

1. A method for operating a wireless device comprising:

the wireless device determining a set of information signals for receipt, the set of information signals carried by a Radio Frequency (RF) Multiple Frequency Bands Multiple Standards (MFBMS) signal having a plurality of information signal frequency bands;

a RF receiver section of the wireless device receiving the RF MFBMS signal;

the RF receiver section of the wireless device;

for a first set of information signals of the RF MFBMS signal, down-converting the RF MFBMS signal by a first shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal; and

for a second set of information signals of the RF MFBMS signal, down-converting the RF MFBMS signal by a second shift frequency to produce the BB/IF MFBMS signal, wherein the second shift frequency differs from the first shift frequency; and

a baseband processor of the wireless device extracting data from the set of information signals of the BB/IF MFBMS signal.

2. The method of claim 1, further comprising, for a third set of information signals of the RF MFBMS signal, down-converting the RF MFBMS signal by a third shift frequency to produce the BB/IF MFBMS signal;

and

3. The method of claim 1:

wherein down converting the RF MFBMS signal by the second shift frequency causes at least one information signal frequency band of the BB/IF MFBMS signal to be shifted below zero frequency; and

further comprising high pass filtering the BB/IF MFBMS signal to remove the at least one information signal frequency band that is shifted below zero frequency.

4. The method of claim 1, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a Wireless Local Area Network (WLAN) frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a cellular telephony frequency band.

5. The method of claim 1, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a Wireless Personal Area Network (WPAN) frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a cellular telephony frequency band.

6. The method of claim 1, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a bi-directional communication frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a Global Positioning System (GPS) frequency band.

7. The method of claim 1, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a first bidirectional communication frequency band;

a second information signal frequency band of the RF MFBMS signal comprises a second bidirectional communication frequency band; and

a third information signal frequency band of the RF MFBMS signal comprises a Global Positioning System (GPS) frequency band.

8. A method for operating a wireless device comprising:

the wireless device determining a set of information signals for receipt, the set of information signals carried by a Radio Frequency (RF) Multiple Frequency Bands Multiple Standards (MFBMS) signal having a plurality of information signal frequency bands;

the wireless device determining a shift frequency based upon the determination;

a RF receiver section of the wireless device receiving the RF MFBMS signal;

the RF receiver section of the wireless device down-converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal; and

a baseband processor of the wireless device extracting data from the set of information signals of the BB/IF MFBMS signal.

9. The method of claim 8, wherein the RF receiver section of the wireless device down-converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal comprises:

the RF receiver section down-converting the RF MFBMS signal by a first shift frequency when the RF MFBMS signal carries a first set of information signals; and

the RF receiver section down-converting the RF MFBMS signal by a second shift frequency when the RF MFBMS signal carries a second set of information signals.

10. The method of claim 8, wherein the RF receiver section of the wireless device down-converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal comprises:

the RF receiver section down-converting the RF MFBMS signal by a first shift frequency when the RF MFBMS signal carries a first set of information signals;

the RF receiver section down-converting the RF MFBMS signal by a second shift frequency when the RF MFBMS signal carries a second set of information signals; and

the RF receiver section down-converting the RF MFBMS signal by a third shift frequency when the RF MFBMS signal carries a third set of information signals; and

11. The method of claim 8:

wherein down converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal causes at least one information signal frequency band to be shifted below zero frequency; and

further comprising high pass filtering the BB/IF MFBMS signal to remove the at least one information signal frequency band that is shifted below zero frequency.

12. The method of claim 8, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a Wireless Local Area Network (WLAN) frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a cellular telephony frequency band.

13. The method of claim 8, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a Wireless Personal Area Network (WPAN) frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a cellular telephony frequency band.

14. The method of claim 8, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a bi-directional communication frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a Global Positioning System (GPS) frequency band.

15. The method of claim 8, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a first bidirectional communication frequency band;

a second information signal frequency band of the RF MFBMS signal comprises a second bidirectional communication frequency band; and

a third information signal frequency band of the RF MFBMS signal comprises a Global Positioning System (GPS) frequency band.

16. A wireless device comprising:

processing circuitry operable to;

determine a set of information signals for receipt, the set of information signals carried by a Radio Frequency (RF) Multiple Frequency Bands Multiple Standards (MFBMS) signal having a plurality of information signal frequency bands;

determine a shift frequency based upon the determination;

a RF receiver section coupled to the baseband processing circuitry operable to;

receive the RF MFBMS signal;

down-convert the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal; and

the processing circuitry further operable to extract data from the set of information signals of the BB/IF MFBMS signal.

17. The wireless device of claim 16, wherein in down-converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal, the RF receiver section is operable to:

down-convert the RF MFBMS signal by a first shift frequency when the RF MFBMS signal carries a first set of information signals; and

down-converting the RF MFBMS signal by a second shift frequency when the RF MFBMS signal carries a second set of information signals.

18. The wireless device of claim 16, wherein in down-converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal, the RF receiver section is operable to:

down-convert the RF MFBMS signal by a first shift frequency when the RF MFBMS signal carries a first set of information signals;

down-convert the RF MFBMS signal by a second shift frequency when the RF MFBMS signal carries a second set of information signals; and

down-convert the RF MFBMS signal by a third shift frequency when the RF MFBMS signal carries a third set of information signals; and

19. The wireless device of claim 16:

wherein in down converting the RF MFBMS signal by the shift frequency to produce a baseband/low Intermediate Frequency (BB/IF) MFBMS signal, at least one information signal frequency band is shifted below zero frequency; and

at least one of the RF receiver section and the baseband processor are further operable to high pass filter the BB/IF MFBMS signal to remove the at least one information signal frequency band that is shifted below zero frequency.

20. The wireless device of claim 16, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a Wireless Local Area Network (WLAN) frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a cellular telephony frequency band.

21. The wireless device of claim 16, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a Wireless Personal Area Network (WPAN) frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a cellular telephony frequency band.

22. The wireless device of claim 16, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a bi-directional communication frequency band; and

a second information signal frequency band of the RF MFBMS signal comprises a Global Positioning System (GPS) frequency band.

23. The wireless device of claim 16, wherein:

a first information signal frequency band of the RF MFBMS signal comprises a first bidirectional communication frequency band;

a second information signal frequency band of the RF MFBMS signal comprises a second bidirectional communication frequency band; and

a third information signal frequency band of the RF MFBMS signal comprises a Global Positioning System (GPS) frequency band.