Physical broadcast channel for channel correction

Patent metadata

Field	Value
Publication number	US-12362871-B2
Application number	US-202217932065-A
Country	US
Kind code	B2
Filing date	Sep 14, 2022
Priority date	Sep 14, 2022
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first physical broadcast channel (PBCH) communication on a channel. The UE may decode the first PBCH communication as a decoded PBCH payload. The UE may reencode the decoded PBCH payload as a first pilot signal. The UE may receive a first data communication with first data. The UE may correct the channel for the first data based on the first pilot signal. The UE may decode the first data. Numerous other aspects are described.

First claim

What is claimed is:

1. A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
receiving a first physical broadcast channel (PBCH) communication, carrying system information, on a channel;
decoding the first PBCH communication as a decoded PBCH payload;
reencoding the decoded PBCH payload as a first pilot signal used for channel estimation;
receiving, on the channel, a first data communication with first data;
correcting the channel for the first data based on the first pilot signal; and
decoding the first data.

2. The method of claim 1 , wherein the first pilot signal is an expected antenna point signal, and wherein correcting the channel for the first data includes:
comparing the expected antenna point signal and a received antenna point signal of the first PBCH communication;
obtaining an estimate of the channel based on a result of the comparing; and
correcting the channel for the first data based on the estimate of the channel.

3. The method of claim 2 , further comprising performing beam selection based at least in part on the estimate of the channel.

4. The method of claim 1 , wherein the reencoding the decoded PBCH payload includes reencoding the decoded PBCH payload based on the decoding of the first PBCH communication being successful.

5. The method of claim 1 , further comprising:
receiving a second PBCH communication on the channel;
reencoding the decoded PBCH payload as a second pilot signal;
receiving a second data communication with second data on the channel;
correcting the channel for the second data based on the second pilot signal; and
decoding the second data.

6. The method of claim 5 , wherein the second pilot signal is an expected antenna point signal, and wherein correcting the channel for the second data includes:
comparing the expected antenna point signal and a received antenna point signal of the second PBCH communication;
obtaining an estimate of the channel based on a result of the comparing; and
correcting the channel for the second data based on the estimate of the channel.

7. The method of claim 1 , further comprising decoding a second PBCH communication to obtain a new decoded PBCH payload based on a difference between a demodulation reference signal signal-to-noise ratio (SNR) of the second PBCH communication and a PBCH SNR of the second PBCH communication satisfying a difference threshold.

8. The method of claim 1 , wherein the reencoding the decoded PBCH payload includes polar encoding the decoded PBCH payload based at least in part on per-stage instructions for a butterfly lattice used for the polar encoding.

9. The method of claim 1 , further comprising:
receiving a second data communication with second data on the channel;
correcting the channel for the second data based on the first pilot signal; and
decoding the second data.

10. The method of claim 1 , wherein the decoding the first data includes decoding the first data to obtain decoded first data, and wherein the method further comprises:
reencoding the decoded first data as a second pilot signal;
receiving a second data communication with second data on the channel;
correcting the channel for the second data based on the second pilot signal; and
decoding the second data.

11. The method of claim 1 , further comprising:
receiving a first control communication with control information on the channel;
decoding the control information to obtain decoded control information;
reencoding the decoded control information as a second pilot signal;
receiving a second data communication with second data on the channel;
correcting the channel for the second data based on the second pilot signal; and
decoding the second data.

12. An apparatus of a user equipment (UE) for wireless communication, comprising:
memory; and
one or more processors coupled to the memory, the memory comprising instructions executable by the one or more processors to cause the UE to:
receive a first physical broadcast channel (PBCH) communication, carrying system information, on a channel;
decode the first PBCH communication as a decoded PBCH payload;
reencode the decoded PBCH payload as a first pilot signal used for channel estimation;
receive, on the channel, a first data communication with first data;
correct the channel for the first data based on the first pilot signal; and
decode the first data.

13. The apparatus of claim 12 , wherein the first pilot signal is an expected antenna point signal, and wherein the instructions, when correcting the channel for the first data, are further executable by the one or more processors to cause the UE to:
compare the expected antenna point signal and a received antenna point signal of the first PBCH communication;
obtain an estimate of the channel based on a result of the comparing; and
correct the channel for the first data based on the estimate of the channel.

14. The apparatus of claim 13 , wherein the memory further comprises instructions executable by the one or more processors to cause the UE to perform reference signal received power estimation based at least in part on the estimate of the channel.

15. The apparatus of claim 12 , wherein the instructions, when reencoding the decoded PBCH payload, are further executable by the one or more processors to cause the UE to reencode the decoded PBCH payload based on the decoding of the first PBCH communication being successful.

16. The apparatus of claim 12 , wherein the memory further comprises instructions executable by the one or more processors to cause the UE to:
receive a second PBCH communication on the channel;
reencode the decoded PBCH payload as a second pilot signal;
receive a second data communication with second data on the channel;
correct the channel for the second data based on the second pilot signal; and
decode the second data.

17. The apparatus of claim 16 , wherein the second pilot signal is an expected antenna point signal, and wherein the instructions, when correcting the channel for the second data, are further executable by the one or more processors to cause the UE to:
compare the expected antenna point signal and a received antenna point signal of the second PBCH communication;
obtain an estimate of the channel based on a result of the comparing; and
correct the channel for the second data based on the estimate of the channel.

18. The apparatus of claim 12 , the memory further comprises instructions executable by the one or more processors to cause the UE to decode a second PBCH communication to obtain a new decoded PBCH payload based on a difference between a demodulation reference signal signal-to-noise ratio (SNR) of the second PBCH communication and a PBCH SNR of the second PBCH communication satisfying a difference threshold.

19. The apparatus of claim 12 , wherein the instructions, when reencoding the first PBCH communication, are further executable by the one or more processors to polar encode the decoded PBCH payload based at least in part on per-stage instructions for a butterfly lattice used for the polar encoding.

20. The apparatus of claim 12 , wherein the memory further comprises instructions executable by the one or more processors to cause the UE to:
receive a second data communication with second data on the channel;
correct the channel for the second data based on the first pilot signal; and
decode the second data.

21. The apparatus of claim 12 , wherein the instructions, when deco

Assignees

• Qualcomm Inc

Inventors

• Kao Yuhung
• Kumar Ravinder

Classifications

• H04L25/0202

  Channel estimation · CPC title

• H04W72/30

  Resource management for broadcast services · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04B17/21

  for calibration; for correcting measurements · CPC title

• H04L25/0236

  using estimation of the other symbols · CPC title