System and method for providing sub-band whitening in the presence of partial-band interference

Patent metadata

Field	Value
Publication number	US-11901933-B2
Application number	US-202217734489-A
Country	US
Kind code	B2
Filing date	May 2, 2022
Priority date	Aug 7, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A method and system for providing sub-band whitening are herein provided. According to one embodiment, a method includes deriving an estimated noise plus interference variance (NIVar) based on at least one legacy-long training field (LLTF) symbol from an LLTF signal; and updating an interference whitening (IW) factor by using a sub-band NIVar.

First claim

What is claimed is:

1. A method for providing sub-band whitening, comprising:
deriving an estimated noise plus interference variance (NIVar) based on at least one legacy-long training field (LLTF) symbol from an LLTF signal; and
updating an interference whitening (IW) factor by using a sub-band of the NIVar.

2. The method of claim 1 , further comprising deriving an original IW factor prior to updating the IW factor.

3. The method of claim 1 , further comprising scaling a frequency domain signal for the sub-band of the NIVar using an original IW factor prior to updating the IW factor.

4. The method of claim 1 , further comprising scaling one or more of the estimated NIVar and the LLTF symbol based on the updated IW factor.

5. The method of claim 1 , wherein the IW factor is updated based on an NIVar of a received signal and a symbol detection output.

6. The method of claim 1 , wherein the estimated NIVar is estimated based on a received signal and a data detection result.

7. The method of claim 1 , wherein the IW factor is updated by using a plurality of sub-band NIVars based on a plurality of data symbols.

8. The method of claim 1 , further comprising scaling a channel, wherein scaling the channel is performed based on a normalization of scaling factors.

9. The method of claim 1 , further comprising splitting the LLTF signal into multiple signals.

10. The method of claim 1 , further comprising estimating an original IW factor based on an error vector magnitude (EVM).

11. The method of claim 10 , wherein the EVM is determined based on a channel estimation and a data signal.

12. A system for providing sub-band whitening, comprising:
a transceiver;
a memory; and
a processor configured to:
derive an estimated noise plus interference variance (NIVar) based on at least one legacy-long training field (LLTF) symbol from an LLTF signal; and
update an interference (IW) factor by using a sub-band of the NIVar.

13. The system of claim 12 , wherein the processor is further configured to derive an original IW factor prior to updating the IW factor.

14. The system of claim 12 , wherein the processor is further configured to scale a frequency domain signal for the sub-band NIVar using an original IW factor prior to updating the IW factor.

15. The system of claim 12 , wherein the processor is further configured to scale one or more of the estimated NIVar and the LLTF symbol based on the updated IW factor.

16. The system of claim 12 , wherein the IW factor is updated based on an NIVar of a received signal and a symbol detection output.

17. The system of claim 12 , wherein the estimated NIVar is estimated based on a received signal and a data detection result.

18. The system of claim 12 , wherein the IW factor is updated by using a plurality of sub-band NIVars based on a plurality of data symbols.

19. The system of claim 12 , wherein the processor is further configured to scale a channel based on a normalization of scaling factors.

20. A non-transitory computer-readable storage medium comprising instructions which, when executed by a processor, cause the processor to perform:
deriving an estimated noise plus interference variance (NIVar) based on at least one legacy-long training field (LLTF) symbol from an LLTF signal; and
updating an interference whitening (IW) factor by using a sub-band of the NIVar.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Ibrahim Mostafa Sayed Roshdy
• Duan Ruchen
• Lee Wook Bong
• Ahn Minki
• Jeon Hyun Bae

Classifications

• H04B1/7102 Primary

  with transform to frequency domain · CPC title

• H04B1/10

  Means associated with receiver for limiting or suppressing noise or interference · CPC title

• H04B17/345

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title

• H04L25/022

  of frequency response · CPC title

• H04L25/03159

  operating in the frequency domain (H04L25/03165, H04L25/03178 take precedence) · CPC title