Wi-fi frequency adjustment for spur mitigation

Patent metadata

Field	Value
Publication number	US-2022408449-A1
Application number	US-202217687711-A
Country	US
Kind code	A1
Filing date	Mar 7, 2022
Priority date	Jun 22, 2021
Publication date	Dec 22, 2022
Grant date	—

Abstract

An apparatus of a Wi-Fi station (STA), the apparatus including a radio frequency (RF) interface, and one or more processors coupled to the RF interface configured to: receive a first periodic training field and a second periodic training field of a preamble of a data packet; compare the first periodic training field of the preamble with the second periodic training field of the preamble; determine a first spurious tone parameter based on the comparison; receive a transmission frame of the data packet; determine a second spurious tone parameter based on the transmission frame of the data packet; and generate a frequency adjustment based on the first spurious tone parameter and the second spurious tone parameter.

First claim

What is claimed is:

1 . An apparatus of a Wi-Fi station (STA), the apparatus including a radio frequency (RF) interface, and one or more processors coupled to the RF interface configured to:
receive a first periodic training field and a second periodic training field of a preamble of a data packet; compare the first periodic training field of the preamble with the second periodic training field of the preamble; determine a first spurious tone parameter based on the comparison; receive a transmission frame of the data packet; determine a second spurious tone parameter based on the transmission frame of the data packet; and generate a frequency adjustment based on the first spurious tone parameter and the second spurious tone parameter.

2 . The apparatus of claim 1 , wherein the first periodic training field and the second periodic training field are long training fields.

3 . The apparatus of claim 1 , wherein the first periodic training field and the second periodic training field are short training fields.

4 . The apparatus of claim 1 , wherein the first spurious tone parameter is an amplitude of the spurious tone.

5 . The apparatus of claim 1 , wherein the first spurious tone parameter is a phase of the spurious tone.

6 . The apparatus of claim 1 , wherein the first spurious tone parameter is a frequency of a spurious tone.

7 . The apparatus of claim 1 , wherein the frequency of the spurious tone is a predetermined value.

8 . The apparatus of claim 1 , wherein the second spurious tone parameter is further based on a comparison of the transmission frame at a first time and the transmission frame at a second time.

9 . The apparatus of claim 1 , wherein the second spurious tone parameter is an amplitude of the spurious tone.

10 . The apparatus of claim 1 , wherein the second spurious tone parameter is a phase of the spurious tone.

11 . The apparatus of claim 1 , wherein the second spurious tone parameter is a frequency of a spurious tone.

12 . The apparatus of claim 1 , further configured to adjust a center frequency of a further data packet based on the frequency adjustment.

13 . The apparatus of claim 12 , wherein the frequency adjustment is based on the frequency of the spurious tone and a frequency offset of a transmitter.

14 . The apparatus of claim 1 , further comprising a radio frequency (RF) phase locked loop (PLL) configured to determine a frequency offset of the frequency adjustment.

15 . A method comprising:
receiving a first periodic training field and a second periodic training field of a preamble of a data packet; comparing the first periodic training field of the preamble with the second periodic training field of the preamble; determining a first spurious tone parameter based on the comparison; receiving a transmission frame of the data packet; determining a second spurious tone parameter of the transmission frame; and generating a frequency adjustment based on the first spurious tone parameter and the second spurious tone parameter.

16 . The method of claim 15 , wherein the first periodic training field and the second periodic training field are long training fields.

17 . The method of claim 16 , wherein the first spurious tone parameter is a phase of the spurious tone.

18 . The method of claim 17 , wherein the second spurious tone parameter is an amplitude of the spurious tone.

19 . The method of claim 16 , further comprising adjusting a center frequency of a further data packet based on the frequency adjustment.

20 . The method of claim 19 , wherein the frequency adjustment is based on the frequency of the spurious tone and a frequency offset of a transmitter.

Assignees

• Intel Corp

Inventors

• Friedman Avishay

Classifications

• H04W72/542 Primary

  using measured or perceived quality · CPC title

• H04L27/0014

  Carrier regulation (of chaotic carriers H04L27/001; for multicarrier receivers H04L27/2657) · CPC title

• H04L2027/0026

  Correction of carrier offset · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W72/085 Primary

  Electricity · mapped topic