COMBINED WWAN AND WLAN SIGNAL PATH CALIBRATION

• US 20160212677A1
• Filed: 01/20/2015
• Published: 07/21/2016
• Est. Priority Date: 01/20/2015
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chakraborty, Kaushik, Das, Soumya, Park, Edwin Chongwoo
• Application Number:
  US14/600,360
• Publication Number:
  US 20160212677A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/0483 Transmitters with multiple parallel paths
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 17/11 for calibration
• CPC Class Codes: H04B 17/14 of the whole transmission and reception path, e.g. self-test loop-back
• CPC Class Codes: H04B 17/21 for calibration; for correcting measurements
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A combined signal path in a UE may use portions of a WWAN transceiver and portions of a WLAN transceiver. The combined signal path may be a combined Tx signal path or a combined Rx signal path. The combined signal path in the UE may be calibrated. Calibration may involve using a feedback path, such as a WWAN feedback path, a WLAN feedback path, or a combination of both WWAN and WLAN feedback paths.

Claims

1. A method for wireless communication, comprising:

routing a signal on a combined signal path that uses at least a portion of a wireless wide area network (WWAN) transceiver in combination with at least a portion of a wireless local area network (WLAN) transceiver; and

calibrating at least a portion of the combined signal path.

2. The method of claim 1, wherein the combined signal path is one of a combined transmission signal path or a combined receive signal path.

3. The method of claim 1, wherein the combined signal path is a combined transmission signal path and a combined receive signal path.

4. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

routing the signal to a feedback path of either the WWAN transceiver or the WLAN transceiver.

5. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

routing the signal to a feedback path of the WWAN transceiver and a feedback path of the WLAN transceiver.

6. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

routing the signal to a calibration unit.

7. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

calibrating a plurality of combined signal paths that each use portions of the WWAN transceiver in combination with portions of the WLAN transceiver.

8. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

routing the signal to a plurality of feedback paths corresponding to a plurality of receive chains associated with either the WWAN or the WLAN transceiver.

9. The method of claim 1, wherein the combined signal path includes at least portions of a digital baseband chain and analog baseband chain of the WWAN transceiver and at least portions of an analog radio frequency (RF) chain of the WLAN transceiver.

10. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

connecting an output of the combined signal path with a feedback path of the WLAN transceiver; and

using the feedback path of the WLAN transceiver.

11. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

calibrating the combined signal path at a WLAN digital baseband chain.

12. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

connecting an output of the combined signal path with a feedback path of the WWAN transceiver; and

using the feedback path of the WWAN transceiver.

13. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

calibrating the combined signal path at the WWAN digital baseband chain.

14. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

connecting an output of the combined signal path with a feedback path of the WLAN transceiver;

connecting the output of the combined signal path with a feedback path of the WWAN transceiver; and

using the feedback paths of the WWAN transceiver and of the WLAN transceiver.

15. The method of claim 9, further comprising:

calibrating at least the portion of the combined signal path at the WWAN digital baseband chain and at a WLAN digital baseband chain.

16. The method of claim 9, wherein calibrating the combined signal path further comprises:

receiving the signal at either the WWAN transceiver or the WLAN transceiver after an over the air transmission of the signal; and

using the feedback paths of either the WWAN transceiver or the WLAN transceiver.

17. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

receiving the signal at the WWAN transceiver and the WLAN transceiver after an over the air transmission of the signal; and

using the feedback paths of the WWAN transceiver and the WLAN transceiver.

18. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

receiving the signal at either the WWAN transceiver or the WLAN transceiver via a cable crossover from an output of the combined signal path to either an input of the WWAN transceiver or an input of the WLAN transceiver; and

using the feedback path of either the WWAN transceiver or the WLAN transceiver.

19. The method of claim 9, wherein calibrating at least the portion of the combined signal path further comprises:

receiving the signal at the WWAN transceiver and the WLAN transceiver via a cable from an output of the combined signal path to an input of the WWAN transceiver and an input of the WLAN transceiver; and

using the feedback path of the WWAN transceiver and the WLAN transceiver.

20. The method of claim 1, wherein the combined signal path includes at least portions of a digital baseband chain and analog baseband chain of the WLAN transceiver and at least portions of an analog radio frequency (RF) chain of the WWAN transceiver.

21. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

calibrating at least portions of a plurality of combined signal paths that each use portions of the WWAN transceiver in combination with portions of the WLAN transceiver,

wherein at least a first one of the plurality of combined signal paths includes at least portions of a digital baseband chain and analog baseband chain of the WWAN transceiver and at least portions of an analog radio frequency (RF) chain of the WLAN transceiver, and at least a second one of the plurality of combined signal paths includes at least portions of a digital baseband chain and analog baseband chain of the WLAN transceiver and at least portions of an analog RF chain of the WWAN transceiver.

22. The method of claim 1, wherein calibrating at least the portion of the combined signal path further comprises:

routing the signal to one or more feedback paths of the WWAN transceiver; and

routing the signal to one or more feedback paths of the WLAN transceiver.

23. An apparatus for wireless communication, comprising:

means for routing a signal on a combined signal path that uses at least a portion of a wireless wide area network (WWAN) transceiver in combination with at least a portion of a wireless local area network (WLAN) transceiver; and

means for calibrating at least a portion of the combined signal path.

24. The apparatus of claim 23, wherein the means for calibrating at least the portion of the combined signal path further comprises:

means for routing the signal to a feedback path of either the WWAN transceiver or the WLAN transceiver.

25. The apparatus of claim 23, wherein the means for calibrating at least the portion of the combined signal path further comprises:

means for routing the signal to a feedback path of the WWAN transceiver and a feedback path of the WLAN transceiver.

26. The apparatus of claim 23, wherein the means for calibrating at least the portion of the combined signal path further comprises:

means for routing the signal to a calibration unit.

27. The apparatus of claim 23, wherein the means for calibrating at least the portion of the combined signal path further comprises:

means for calibrating a plurality of combined signal paths that each use portions of the WWAN transceiver in combination with portions of the WLAN transceiver.

28. The apparatus of claim 23, wherein the means for calibrating at least the portion of the combined signal path further comprises:

means for routing the signal to a plurality of feedback paths corresponding to a plurality of receive chains associated with either the WWAN or the WLAN transceiver.

29. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

route a signal on a combined signal path that uses at least a portion of a wireless wide area network (WWAN) transceiver in combination with at least a portion of a wireless local area network (WLAN) transceiver; and

calibrate at least a portion of the combined signal path.

30. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code executable by a processor to:

route a signal on a combined signal path that uses at least a portion of a wireless wide area network (WWAN) transceiver in combination with at least a portion of a wireless local area network (WLAN) transceiver; and

calibrate at least a portion of the combined signal path.