Long training field (ltf) for a distributed resource unit (dru)

A non-access point (AP) station (STA) comprising:

• a transceiver;
• and
• a processor operatively coupled to the transceiver;
• wherein:
• the transceiver is configured to receive, from an AP, a trigger frame including a resource unit (RU) allocation field indicating a distributed resource unit (DRU) index value;
• the processor is configured to determine, based on the indicated DRU index value, a distribution bandwidth and a DRU allocation from a plurality of DRU allocations, wherein each of the plurality of DRU allocations includes respective subcarriers;
• wherein subcarriers of the determined DRU allocation are interleaved with subcarriers of one or more other DRU allocations of the plurality of DRU allocations, across the distribution bandwidth;
• the processor is configured to determine a DRU long training field (LTF) sequence based on a contiguous subset of values of an extremely high throughput (EHT)-LTF sequence;
• and
• the transceiver and the processor are configured to transmit a signal, to the AP, in the determined DRU allocation, including a physical layer (PHY) preamble including the DRU LTF, wherein each respective value of the DRU LTF sequence is transmitted on a respective subcarrier of the determined DRU allocation.

A method for use in a non-access point (AP) station (STA), the method comprising:

• receiving, from an AP, a trigger frame including a resource unit (RU) allocation field indicating a distributed resource unit (DRU) index value;
• determining, based on the indicated DRU index value, a distribution bandwidth and a DRU allocation from a plurality of DRU allocations, wherein each of the plurality of DRU allocations includes respective subcarriers;
• wherein subcarriers of the determined DRU allocation are interleaved with subcarriers of one or more other DRU allocations of the plurality of DRU allocations, across the distribution bandwidth;
• determining a DRU long training field (LTF) sequence based on a subset of values of an extremely high throughput (EHT)-LTF sequence, wherein each respective value of the DRU LTF sequence at a respective subcarrier index is the same as a respective value of the EHT-LTF at the respective subcarrier index;
• and
• transmitting a signal, to the AP, in the determined DRU allocation, including a physical layer (PHY) preamble including the DRU LTF.

A non-access point (AP) station (STA) comprising:

• a transceiver;
• and
• a processor operatively coupled to the transceiver;
• wherein:
• the transceiver is configured to receive, from an AP, a trigger frame including a resource unit (RU) allocation field indicating a distributed resource unit (DRU) index value;
• the processor is configured to determine, based on the indicated DRU index value, a distribution bandwidth and a DRU allocation from a plurality of DRU allocations, wherein each of the plurality of DRU allocations includes respective subcarriers;
• wherein subcarriers of the determined DRU allocation are interleaved with subcarriers of one or more other DRU allocations of the plurality of DRU allocations, across the distribution bandwidth;
• the processor is configured to determine a DRU long training field (LTF) sequence based on a subset of values of an extremely high throughput (EHT)-LTF sequence, wherein each respective value of the DRU LTF sequence at a respective subcarrier index is the same as a respective value of the EHT-LTF at the respective subcarrier index;
• and
• the transceiver and the processor are configured to transmit a signal, to the AP, in the determined DRU allocation, including a physical layer (PHY) preamble including the DRU LTF, wherein each respective value of the DRU LTF sequence is transmitted on a respective subcarrier of the determined DRU allocation.