Flexible waveform synthesis in NR-SS

Patent metadata

Field	Value
Publication number	US-11677518-B2
Application number	US-202117184209-A
Country	US
Kind code	B2
Filing date	Feb 24, 2021
Priority date	Apr 5, 2018
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A receiver is configured to detect a plurality of signals on a plurality of subbands over a communication channel that operates on a shared or an unlicensed spectrum. Additionally, the receiver is configured to perform joint correlation over a time domain and a frequency domain of each successive signal of the plurality of signals. Moreover, the receiver is configured to determine a sequence based on the joint correlation. Additionally, the receiver is configured to decode transmission information from the sequence.

First claim

What is claimed is:

1. A method of wireless communication, comprising:
detecting, by a receiver, a plurality of signals on a plurality of subbands over a communication channel that is operating on shared or unlicensed spectrum;
performing, by the receiver, joint correlation over a time domain and a frequency domain of each successive signal of the plurality of signals;
determining, by the receiver, a sequence based on the joint correlation; and
decoding, by the receiver, transmission information from the sequence.

2. The method of claim 1 , wherein the determining the sequence includes one or more of:
comparing, by the receiver, correlation metrics of the joint correlation for first signals of the plurality of signals against subsequent correlation metrics of the joint correlation for subsequent signals of the plurality of signals for the determining the sequence; and
adding, by the receiver, the correlation metrics and the subsequent correlation metrics and determining the sequence based on a sum of the correlation metrics and the subsequent correlation metrics.

3. The method of claim 1 , wherein the joint correlation is performed by parallel correlator banks at a transmitter for each subband of one or more subbands of the plurality of subbands in the shared or unlicensed spectrum on which the plurality of signals is detected.

4. The method of claim 3 , further including:
determining, by the receiver, a bandwidth capability of the receiver for communications over the communication channel;
configuring, by the receiver, a number of correlator banks for the parallel correlator banks based on the bandwidth capability.

5. The method of claim 1 , wherein the detecting the plurality of signals is based on monitoring, by the receiver, for a flexible shared spectrum waveform.

6. The method of claim 1 , wherein the sequence includes one or more of: a constant amplitude zero autocorrelation (CAZAC) sequence, a chirp sequence.

7. The method of claim 1 , wherein the sequence is selected at a transmitter of the plurality of signals based on a plurality of pre-configured root indices and a plurality of pre-configured cyclic shifts.

8. The method of claim 1 , wherein the sequence is selected at a transmitter of the plurality of signals based on a plurality of pre-configured root indices and a plurality of pre-configured cyclic shifts.

9. An apparatus configured for wireless communication, comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured:
to detect, by a receiver, a plurality of signals on a plurality of subbands over a communication channel that is operating on shared or unlicensed spectrum;
to perform, by the receiver, joint correlation over a time domain and a frequency domain of each successive signal of the plurality of signals;
to determine, by the receiver, a sequence based on the joint correlation; and
to decode, by the receiver, transmission information from the sequence.

10. The apparatus of claim 9 , wherein the configuration of the at least one processor determine the sequence includes configuration of the at least one processor to one or more of:
compare, by the receiver, correlation metrics of the joint correlation for first signals of the plurality of signals against subsequent correlation metrics of the joint correlation for subsequent signals of the plurality of signals for the determining the sequence; and
add, by the receiver, the correlation metrics and the subsequent correlation metrics and determining the sequence based on a sum of the correlation metrics and the subsequent correlation metrics.

11. The apparatus of claim 9 , wherein the joint correlation is performed by parallel correlator banks at the receiver for each subband of one or more subbands of the plurality of subbands in the shared or unlicensed spectrum on which the plurality of signals is detected.

12. The apparatus of claim 11 , further including configuration of the at least one processor:
to determine, by the receiver, a bandwidth capability of the receiver for communications over the communication channel;
to configure, by the receiver, a number of correlator banks for the parallel correlator banks based on the bandwidth capability.

13. The apparatus of claim 9 , wherein the at least one processor is configured to detect the plurality of signals based on monitoring for a flexible shared spectrum waveform.

14. The apparatus of claim 9 , wherein the sequence includes one or more of: a constant amplitude zero autocorrelation (CAZAC) sequence, a chirp sequence.

15. A non-transitory computer-readable medium having program code recorded thereon for adaptive waveform selection for signal transmission in a wireless communication system, the program code comprising:
program code for causing one or more computers to:
detect a plurality of signals on a plurality of subbands over a communication channel that is operating on shared or unlicensed spectrum;
perform joint correlation over a time domain and a frequency domain of each successive signal of the plurality of signals;
determine a sequence based on the joint correlation; and
decode transmission information from the sequence.

16. The non-transitory computer-readable medium of claim 15 , wherein the program code causing one or more computers to determine the sequence includes program code to one or more of:
compare correlation metrics of the joint correlation for first signals of the plurality of signals against subsequent correlation metrics of the joint correlation for subsequent signals of the plurality of signals for the determining the sequence; and
add the correlation metrics and the subsequent correlation metrics and determining the sequence based on a sum of the correlation metrics and the subsequent correlation metrics.

17. The non-transitory computer-readable medium of claim 15 , wherein the program code comprises program code for causing one or more computers to:
determine a bandwidth capability for communications over the communication channel;
configure a number of correlator banks for parallel correlator banks based on the bandwidth capability.

18. The non-transitory computer-readable medium of claim 15 , wherein the sequence includes one or more of: a constant amplitude zero autocorrelation (CAZAC) sequence, a chirp sequence.

19. The non-transitory computer-readable medium of claim 15 , wherein the sequence is selected based on a plurality of pre-configured root indices and a plurality of pre-configured cyclic shifts.

20. The non-transitory computer-readable medium of claim 15 , wherein the program code causing one or more computers to detect the plurality of signals includes program code to monitor for a flexible shared spectrum waveform.

Assignees

• Qualcomm Inc
• Qualcomm Incorproated

Inventors

• Lei Jing
• Yerramalli Srinivas
• Kadous Tamer

Classifications

• H04L27/26

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

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L27/2663

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

• H04J13/0059

  CAZAC [constant-amplitude and zero auto-correlation] · CPC title