Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications

• US 10,547,714 B2
• Filed: 02/20/2018
• Issued: 01/28/2020
• Est. Priority Date: 04/26/2012
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Inventors: Porat, Ron
• Primary Examiner(s): Levitan, Dmitry
• Application Number:
  US15/900,437
• Publication Number:
  US 20180176343A1
• Time in Patent Office: 707 Days
• Field of Search: 370310, 370328, 370329, 370431, 370464, 370465
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2651 Modification of fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators for performance improvement
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications. A signal is processed within a communication device using at least two respective downclocking ratios (e.g., a first downclocking ratio applied to a first portion of the signal such as a frame or packet extracted there from, a second downclocking ratio applied to a second portion of the signal). Alternatively, a signal is divided into more than two respective portions, and different respective downclocking ratios are applied to those different respective portions (e.g., a first downclocking ratio applied to a first portion of the signal, and so on up to an n-th downclocking ratio applied to an n-th portion of the signal). Some implementations apply a singular or common downclocking ratio to more than one portion of the signal (which may be contiguous/adjacent or non-contiguous/non-adjacent within the signal).

Claims

1. A wireless communication device comprising:

a communication interface; and

processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to;

receive an orthogonal frequency division multiplexing (OFDM) packet from another wireless communication device via a communication channel having a channel bandwidth;

process a first portion of the OFDM packet that includes a first one or more fields based on a first one or more OFDM symbols based on a first clock signal;

downclock the first clock signal using a downclocking factor to generate a second clock signal;

process a second portion of the OFDM packet that includes a second one or more fields based on a second one or more OFDM symbols and that follows the first portion of the OFDM packet based on the second clock signal to extend symbol duration of the second one or more fields based on the second one or more OFDM symbols;

downclock the first clock signal using another downclocking factor to generate a third clock signal; and

process a third portion of the OFDM packet that includes a third one or more fields based on a third one or more OFDM symbols and that follows the second portion of the OFDM packet based on the third clock signal to extend symbol duration of the third one or more fields based on the third one or more OFDM symbols.

2. The wireless communication device of claim 1, wherein the at least one of the communication interface or the processing circuitry is further configured to:

downclock the first clock signal using the downclocking factor of 4 to generate the second clock signal.

3. The wireless communication device of claim 1, wherein:

the first one or more fields based on the first one or more OFDM symbols of the first portion of the OFDM packet includes at least one signal field (SIG); and

the second one or more fields based on the second one or more OFDM symbols of the second portion of the OFDM packet includes at least one data field.

4. The wireless communication device of claim 1, wherein the at least one of the communication interface or the processing circuitry is further configured to:

downclock the first clock signal using the downclocking factor of 2 to generate the second clock signal; and

downclock the first clock signal using the another downclocking factor of 4 to generate the third clock signal.

5. The wireless communication device of claim 1, wherein:

the first one or more fields based on the first one or more OFDM symbols of the first portion of the OFDM packet includes at least one signal field (SIG);

the second one or more fields based on the second one or more OFDM symbols of the second portion of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and

the third one or more fields based on the third one or more OFDM symbols of the third portion of the OFDM packet includes at least one data field.

6. The wireless communication device of claim 1 further comprising:

an access point (AP), wherein the another wireless communication device includes a wireless station (STA).

7. The wireless communication device of claim 1 further comprising:

a wireless station (STA), wherein the another wireless communication device includes an access point (AP).

8. A wireless communication device comprising:

a communication interface; and

processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to;

receive an orthogonal frequency division multiplexing (OFDM) packet from another wireless communication device via a communication channel having a channel bandwidth;

process a first portion of the OFDM packet that includes a first one or more fields based on a first one or more OFDM symbols based on a first clock signal;

downclock the first clock signal using a first downclocking factor to generate a second clock signal;

process a second portion of the OFDM packet that includes a second one or more fields based on a second one or more OFDM symbols and that follows the first portion of the OFDM packet based on the second clock signal to extend symbol duration of the second one or more fields based on the second one or more OFDM symbols;

downclock the first clock signal using a second downclocking factor to generate a third clock signal; and

process a third portion of the OFDM packet that includes a third one or more fields based on a third one or more OFDM symbols and that follows the second portion of the OFDM packet based on the third clock signal to extend symbol duration of the third one or more fields based on the third one or more OFDM symbols.

9. The wireless communication device of claim 8, wherein the at least one of the communication interface or the processing circuitry is further configured to:

downclock the first clock signal using the first downclocking factor of 2 to generate the second clock signal; and

downclock the first clock signal using the second downclocking factor of 4 to generate the third clock signal.

10. The wireless communication device of claim 8, wherein:

the first one or more fields based on the first one or more OFDM symbols of the first portion of the OFDM packet includes at least one signal field (SIG);

the second one or more fields based on the second one or more OFDM symbols of the second portion of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and

the third one or more fields based on the third one or more OFDM symbols of the third portion of the OFDM packet includes at least one data field.

11. The wireless communication device of claim 8 further comprising:

an access point (AP), wherein the another wireless communication device includes a wireless station (STA).

12. The wireless communication device of claim 8 further comprising:

a wireless station (STA), wherein the another wireless communication device includes an access point (AP).

13. A method for execution by a wireless communication device, the method comprising:

receiving, via a communication interface of the wireless communication device, an orthogonal frequency division multiplexing (OFDM) packet from another wireless communication device via a communication channel having a channel bandwidth;

processing a first portion of the OFDM packet that includes a first one or more fields based on a first one or more OFDM symbols based on a first clock signal;

downclocking the first clock signal using a downclocking factor to generate a second clock signal;

processing a second portion of the OFDM packet that includes a second one or more fields based on a second one or more OFDM symbols and that follows the first portion of the OFDM packet based on the second clock signal to extend symbol duration of the second one or more fields based on the second one or more OFDM symbols;

downclocking the first clock signal using another downclocking factor to generate a third clock signal; and

processing a third portion of the OFDM packet that includes a third one or more fields based on a third one or more OFDM symbols and that follows the second portion of the OFDM packet based on the third clock signal to extend symbol duration of the third one or more fields based on the third one or more OFDM symbols.

14. The method of claim 13 further comprising:

downclocking the first clock signal using the downclocking factor of 4 to generate the second clock signal.

15. The method of claim 13, wherein:

the first one or more fields based on the first one or more OFDM symbols of the first portion of the OFDM packet includes at least one signal field (SIG); and

the second one or more fields based on the second one or more OFDM symbols of the second portion of the OFDM packet includes at least one data field.

16. The method of claim 13 further comprising:

downclocking the first clock signal using the downclocking factor of 2 to generate the second clock signal; and

downclocking the first clock signal using the another downclocking factor of 4 to generate the third clock signal.

17. The method of claim 13, wherein:

the first one or more fields based on the first one or more OFDM symbols of the first portion of the OFDM packet includes at least one signal field (SIG);

the second one or more fields based on the second one or more OFDM symbols of the second portion of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and

the third one or more fields based on the third one or more OFDM symbols of the third portion of the OFDM packet includes at least one data field.

18. The method of claim 13, wherein the wireless communication device includes an access point (AP), and the another wireless communication device includes a wireless station (STA).