CHANNEL ESTIMATION FOR BONDED CHANNELS

• US 20160261319A1
• Filed: 02/29/2016
• Published: 09/08/2016
• Est. Priority Date: 03/05/2015
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: SANDEROVICH, Amichai
• Application Number:
  US15/056,221
• Publication Number:
  US 20160261319A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

Certain aspects of the present disclosure provide methods for performing channel estimation of a bonded channel (across multiple channels). An example method includes obtaining a frame received on a bonded channel formed by a plurality of channels, the frame having a plurality of channel estimation training sequences associated with the plurality of channels; generating an aggregated channel estimate for the bonded channel based on the channel estimation training sequences associated with each of the plurality of channels; and processing the frame based on the aggregated channel estimate.

Claims

1. An apparatus for wireless communications, comprising:

an interface for obtaining a frame via a bonded channel formed by a plurality of channels, the frame having a plurality of channel estimation training sequences, each of the channel estimation sequences being associated with at least one of the plurality of channels; and

a processing system configured to generate an aggregated channel estimate for the bonded channel based on the channel estimation training sequences and process the frame based on the aggregated channel estimate.

2. The apparatus of claim 1, wherein each of the channel estimation training sequences comprises a Golay sequence.

3. The apparatus of claim 1, wherein the processing system is configured to generate the aggregated channel estimate for the bonded channel by:

generating an individual channel estimate for each of the plurality of channels, based on the channel estimation training sequences; and

generating the aggregated channel estimate for the bonded channel based on the individual channel estimates.

4. The apparatus of claim 3, wherein the processing system is configured to generate the individual channel estimates in frequency domain and generate the aggregated channel estimate for the bonded channel in frequency domain.

5. The apparatus of claim 3, wherein the processing system is configured to generate the individual channel estimate for each of the plurality of channels by:

modulating, in frequency domain, signals received via the plurality of channels, the signals comprising at least one of the channel estimation training sequences; and

generating the individual channel estimate for each of the plurality of channels based on the modulated received signals.

6. The apparatus of claim 5, wherein the modulation is performed by the processing system in digital or analog domain.

7. The apparatus of claim 3, wherein the generation of the individual channel estimates is performed by the processing system in time domain.

8. The apparatus of claim 3, wherein the processing system is configured to process the individual channel estimates in frequency domain to correct biases.

9. The apparatus of claim 1, wherein the processing system is further configured to:

compare a phase of a first sequence transmitted in a first of the plurality of channels with a phase of a second sequence transmitted in a second of the plurality of channels; and

adjust the phase of the second sequence based on the comparison.

10. A method for wireless communications by an apparatus, comprising:

obtaining a frame via a bonded channel formed by a plurality of channels, the frame having a plurality of channel estimation training sequences, each of the channel estimation sequences being associated with at least one of the plurality of channels;

generating an aggregated channel estimate for the bonded channel based on the channel estimation training sequences; and

processing the frame based on the aggregated channel estimate.

11. The method of claim 10, wherein each of the channel estimation training sequences comprises a Golay sequence.

12. The method of claim 10, wherein generating the aggregated channel estimate comprises:

generating an individual channel estimate for each of the plurality of channels, based on the channel estimation training sequences; and

generating the aggregated channel estimate for the bonded channel based on the individual channel estimates.

13. The method of claim 12, wherein the individual channel estimates are generated in frequency domain and the aggregated channel estimate for the bonded channel is generated in frequency domain.

14. The method of claim 12, wherein generating the individual channel estimate for each of the plurality of channels comprises:

modulating, in frequency domain, signals received via each of the plurality of channels, the signals comprising at least one of the channel estimation training sequences; and

generating the individual channel estimate for each of the plurality of channels based on the modulated received signals.

15. The method of claim 14, wherein the modulation is performed by the processing system in digital or analog domain.

16. The method of claim 12, wherein generating the individual channel estimates is performed in time domain.

17. The method of claim 12, further comprising processing the individual channel estimates in frequency domain to correct biases.

18. The method of claim 10, further comprising:

comparing a phase of a first sequence transmitted in a first of the plurality of channels with a phase of a second sequence transmitted in a second of the plurality of channels; and

adjusting the phase of the second sequence based on the comparison.

19-28. -28. (canceled)

29. A wireless station, comprising:

at least one antenna;

receiver configured to receive, via the at least one antenna on a bonded channel formed by a plurality of channels, the frame having a plurality of channel estimation training sequences, each of the channel estimation sequences being associated with at least one of the plurality of channels; and

a processing system configured to generate an aggregated channel estimate for the bonded channel based on the channel estimation training sequences and process the frame based on the aggregated channel estimate.