Punctured null data packet (NDP) within wireless communications

1. A communications circuit, comprising one or more communications processors configured to:

generate a null data packet (NDP) comprising an identification of a preamble puncturing option;

transmit, via a communications interface, at least a portion of the NDP to a device via a first subset of a plurality of sub-channels of a communication channel, wherein a second subset of the plurality of the sub-channels is unused by the transmission;

receive, via the communications interface, feedback from the device that is based on the device processing the at least the portion of the NDP that is received via the first subset of the plurality of sub-channels of the communication channel; and

process a portion of the feedback from the device while ignoring another portion of the feedback from the device that corresponds to at least one of the second subset of the plurality of sub-channels of the communication channel.

2. The communications circuit of claim 1 , wherein:

the communication channel includes a 320 MHz communication channel;

the plurality of sub-channels of the communication channel includes sixteen 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than sixteen of the 20 MHz sub-channels.

3. The communications circuit of claim 1 , wherein:

the communication channel includes a 160 MHz communication channel;

the plurality of sub-channels of the communication channel includes eight 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than eight of the 20 MHz sub-channels.

4. The communications circuit of claim 1 , wherein:

the communication channel includes an 80 MHz communication channel;

the plurality of sub-channels of the communication channel includes four 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than four of the 20 MHz sub-channels.

5. The communications circuit of claim 1 , further comprising:

circuitry configured to support communications within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.

6. The communications circuit of claim 1 , wherein the first subset of a plurality of sub-channels of a communication channel includes punctured 20 MHz channels, and wherein the one or more communications processors are further configured to receive, via the communications interface from the device, a designation of the punctured 20 MHz channels in a packet preceding the transmission of at least a portion of the NDP to the device.

7. A method, comprising:

communicating, by a first device with a second device, a packet designating a first subset of a plurality of sub-channels of a communication channel comprising punctured 20 MHz channels;

subsequently receiving, by the first device from the second device, a null data packet (NDP) via the first subset of the plurality of sub-channels, wherein a second subset of the plurality of the sub-channels is unused;

estimating characteristics of the communication channel across an entire bandwidth of the communication channel, by the first device, based on processing the received portion of the NDP; and

transmitting, by the first device to the second device, the estimate via the first subset of the plurality of sub-channels, receipt of the estimate causing the second device to process the estimate and ignore a signal received via the second subset of the plurality of sub-channels.

8. The method of claim 7 , wherein:

the communication channel includes a 320 MHz communication channel;

the plurality of sub-channels of the communication channel includes sixteen 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than sixteen of the 20 MHz sub-channels.

9. The method of claim 7 , wherein:

the communication channel includes a 160 MHz communication channel;

the plurality of sub-channels of the communication channel includes eight 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than eight of the 20 MHz sub-channels.

10. The method of claim 7 , wherein:

the communication channel includes an 80 MHz communication channel;

the plurality of sub-channels of the communication channel includes four 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than four of the 20 MHz sub-channels.

11. The method of claim 7 , wherein communicating the packet designating the first subset further comprises transmitting, by the first device to the second device, the packet.

12. The method of claim 7 , wherein the signal received by the second device via the second subset of the plurality of sub-channels comprises interference or a transmission of a third device using the second subset of the plurality of sub-channels.

13. The method of claim 7 , wherein receipt of the estimate causes the second device to ignore a portion of the estimated characteristics corresponding to at least one punctured 20 MHz channel.

14. A communications circuit, comprising one or more communications processors configured to:

communicate, with a device, a packet designating a first subset of a plurality of sub-channels of a communication channel comprising punctured 20 MHz channels;

subsequently receive, from the device, a null data packet (NDP) via the first subset of the plurality of sub-channels, wherein a second subset of the plurality of the sub-channels is unused;

estimate characteristics of the communication channel across an entire bandwidth of the communication channel, based on processing the received portion of the NDP; and

transmit, to the device, the estimate via the first subset of the plurality of sub-channels, receipt of the estimate causing the device to process the estimate and ignore a signal received via the second subset of the plurality of sub-channels.

15. The communications circuit of claim 14 , wherein:

the communication channel includes a 320 MHz communication channel;

the plurality of sub-channels of the communication channel includes sixteen 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than sixteen of the 20 MHz sub-channels.

16. The communications circuit of claim 14 , wherein:

the communication channel includes a 160 MHz communication channel;

the plurality of sub-channels of the communication channel includes eight 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than eight of the 20 MHz sub-channels.

17. The communications circuit of claim 14 , wherein:

the communication channel includes an 80 MHz communication channel;

the plurality of sub-channels of the communication channel includes four 20 MHz sub-channels; and

the first subset of the plurality of sub-channels of the communication channel includes at least one and fewer than four of the 20 MHz sub-channels.

18. The communications circuit of claim 14 , wherein the one or more communications processors are configured to communicate the packet designating the first subset by transmitting the packet to the device.

19. The communications circuit of claim 14 , wherein the signal received by the device via the second subset of the plurality of sub-channels comprises interference or a transmission of a second device using the second subset of the plurality of sub-channels.

20. The communications circuit of claim 14 , wherein receipt of the estimate causes the device to ignore a portion of the estimated characteristics corresponding to at least one punctured 20 MHz channel.