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US 11,949,471 B2Granted
Communication of high efficiency (HE) long training fields (LTFs) in a wireless local area network (WLAN)
AssigneeInterDigital Patent Holdings, Inc.
InventorsHanqing Lou, Oghenekome Oteri, Pengfei Xia, Robert Olesen
Life of this patent
Estimating the term…
Abstract
A method performed by a STA may comprise transmitting an HE LTF of a data unit. The HE LTF may have a number of symbols based on a number of space-time streams utilized for the data unit. The HE LTF may be transmitted on a subset of subcarriers of a 20 MHz channel, a 40 MHz channel or an 80 MHz channel.
Claims15
A station comprising:
- a processor configured to determine a number of symbols utilized for a long training field (LTF) based on a number of space-time streams associated with a wireless local area network (WLAN) communication, wherein the number of symbols utilized for the LTF comprises 1, 2, 4, 6, or 8 symbols, wherein, on a condition that the number of space-time streams is equal to 3, 5, or 7, the processor is configured to determine the number of symbols is a next higher number than the number of space-time streams;
- and
- a transmitter configured to transmit, in an uplink multiple input multiple output (UL MIMO) transmission, the determined number of symbols utilized for the LTF using a set of subcarriers associated with a subchannel including subcarrier indices, wherein the subcarrier indices are associated with the number of space-time streams.
A method comprising:
- determining, by a station, a number of symbols utilized for a long training field (LTF) based on a number of space-time streams associated with a wireless local area network (WLAN) communication, wherein the number of symbols utilized for the LTF comprises 1, 2, 4, 6, or 8 symbols, wherein, on condition that the number of space-time streams is equal to 3, 5, or 7, the number of symbols is a next higher number than the number of space-time streams;
- and
- transmitting, by the station, in an uplink multiple input multiple output (UL transmission, the determined number of symbols utilized for the HE LTF using a set of subcarriers associated with a subchannel including subcarrier indices, wherein the subcarrier indices are associated with the number of space-time streams.
Dependencies are inferred from the claim text.