Method and device for timing alignment

Patent metadata

Field	Value
Publication number	US-11057257-B2
Application number	US-201716639929-A
Country	US
Kind code	B2
Filing date	Sep 18, 2017
Priority date	Sep 18, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A method and device for timing alignment are disclosed. The method includes widening spectra of two signals for timing misalignment estimation; performing cross-correlation between the two spectrum-widened signals; and estimating the timing misalignment between the two signals according to a result of the cross-correlation. Therefore, an accurate time alignment result will be obtained with low complexity. Furthermore, it will be appropriate for all types of signals including separated multi-carrier signals.

First claim

What is claimed is:

1. A method for timing alignment, comprising:
generating two spectrum-widened signals by widening spectra of two signals for timing misalignment estimation;
determining a result of performing cross-correlation between the two spectrum-widened signals; and
estimating the timing misalignment between the two signals based on the result of performing the cross-correlation,
wherein widening the spectra of the two signals comprises stitching a stitching number of signals in a frequency for the two signals respectively to obtain the two spectrum-widened signals.

2. The method of claim 1 , wherein widening the spectra of the two signals for the timing misalignment estimation further comprises:
shifting the two signals in the frequency according to a predetermined shift value and a predetermined stitching number, to obtain the stitching number of signals for the two signals respectively.

3. The method of claim 2 , wherein shifting the two signals in the frequency according to the predetermined shift value and the predetermined stitching number comprises:
shifting the two signals in the frequency respectively according to n times of the predetermined shift value, to obtain (N−1) shifted signals, where n is an integer from 1 to N−1 and N is the stitching number,
wherein, the two signals before shifting and the (N−1) shifted signals constitute the stitching number of signals for the two signals respectively.

4. The method of claim 2 , further comprising:
setting the stitching number according to a predetermined strategy; and
calculating the predetermined shift value according to a maximum bandwidth among at least two carriers used for transmitting the two signals and the stitching number.

5. The method of claim 2 , wherein stitching the stitching number of signals in the frequency for the two signals respectively comprises:
stitching the stitching number of signals in the frequency in a continual mode or a non-continual mode for the two signals respectively.

6. The method of claim 1 , wherein the two signals comprise at least one of: a transmitted signal and a feedback signal from an observation receiver in a digital pre-distortion (“DPD”) system; and a transmitted signal and a received signal in a digital communications system.

7. The method of claim 1 , wherein the two signals comprise at least one of: single carrier signals; continual multi-carrier signals; and separated multi-carrier signals.

8. A device for timing alignment, comprising:
processing circuitry; and
memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the device to perform operations comprising:
generating two spectrum-widened signals by widening spectra of two signals for timing misalignment estimation;
determining a result of performing cross-correlation between the two spectrum-widened signals; and
estimating the timing misalignment between the two signals based on the result of performing the cross-correlation,
wherein widening the spectra of the two signals comprises shifting the two signals in the frequency according to a predetermined shift value and a predetermined stitching number, to obtain a stitching number of signals for the two signals respectively.

9. The device of claim 8 , wherein generating the two spectrum-widened signals further comprises:
stitching the stitching number of signals in the frequency for the two signals respectively, to obtain the two spectrum-widened signals.

10. The device of claim 9 , wherein shifting the two signals in the frequency comprises:
shifting the two signals in the frequency respectively according to n times of the predetermined shift value, to obtain (N−1) shifted signals, where n is an integer from 1 to N−1, N is the stitching number,
wherein, the two signals before shifting and the (N−1) shifted signals constitute the stitching number of signals for the two signals respectively.

11. The device of claim 9 , the operations further comprising:
setting the stitching number according to a predetermined strategy; and
calculating the predetermined shift value according to a maximum bandwidth among at least two carriers used for transmitting the two signals and the stitching number.

12. The device of claim 9 , wherein stitching the stitching number of signals in the frequency for the two signals respectively comprises:
stitching the stitching number of signals in the frequency in a continual mode or a non-continual mode for the two signals respectively.

13. The method of claim 8 , wherein the two signals comprise at least one of: a transmitted signal and a feedback signal from an observation receiver in a digital pre-distortion (“DPD”) system; a transmitted signal and a received signal in a digital communications system; single carrier signals; continual multi-carrier signals; and separated multi-carrier signals.

14. A non-transitory computer-readable medium having instructions stored therein that are executable by processing circuitry of a device for timing alignment to cause the device to perform operations comprising:
generating two spectrum-widened signals by widening spectra of two signals for timing misalignment estimation;
determining a result of performing cross-correlation between the two spectrum-widened signals; and
estimating the timing misalignment between the two signals based on the result of performing the cross-correlation,
wherein widening the spectra of the two signals comprises stitching a stitching number of signals in a frequency for the two signals respectively to obtain the two spectrum-widened signals.

15. The non-transitory computer-readable medium of claim 14 , wherein generating the two spectrum-widened signals comprises:
shifting the two signals in the frequency according to a predetermined shift value and a predetermined stitching number, to obtain the stitching number of signals for the two signals respectively.

16. The non-transitory computer-readable medium of claim 15 , wherein shifting the two signals in the frequency comprises:
shifting the two signals in the frequency respectively according to n times of the predetermined shift value, to obtain (N−1) shifted signals, where n is an integer from 1 to N−1, N is the stitching number,
wherein, the two signals before shifting and the (N−1) shifted signals constitute the stitching number of signals for the two signals respectively.

17. The non-transitory computer-readable medium of claim 15 , the operations further comprising:
setting the stitching number according to a predetermined strategy; and
calculating the predetermined shift value according to a maximum bandwidth among at least two carriers used for transmitting the two signals and the stitching number.

18. The non-transitory computer-readable medium of claim 15 , wherein stitching the stitching number of signals in the frequency for the two signals respectively comprises:
stitching the stitching number of signals in the frequency in a continual mode or a non-continual mode for the two signals respectively.

19. The non-transitory computer-readable medium of claim 14 , wherein the two signals comprise at least one of: a transmitted signal and a feedback signal from an observation receiver in a digital pre-distortion (“DPD”) system; and a transmitted signal and a received signal in a digital communications system.

20. The non-transitory computer-readable medium of claim 14 , wherein the two signals comprise at least one of: singl

Assignees

• Ericsson Telefon Ab L M

Inventors

• Liu Peng
• Jie Junfeng

Classifications

• H04L27/26

  Systems using multi-frequency codes (H04L27/32 takes precedence) · CPC title

• H04L27/2663 Primary

  Coarse synchronisation, e.g. by correlation · CPC title

• H04L27/2676

  Blind, i.e. without using known symbols · CPC title