Long training field sequence construction
DCFirst Claim
1. An apparatus for facilitating wireless communication, the apparatus comprising:
- one or more memories; and
one or more processors coupled to the one or more memories, the one or more processors configured to cause;
determining a channel bandwidth among a plurality of bandwidths including a 20 megahertz (MHz) channel bandwidth, 40 MHz channel bandwidth, and 80 MHz channel bandwidth;
determining a high efficiency long training field (HE-LTF) mode among a plurality of HE-LTF modes including a 4×
HE-LTF mode and a 2×
HE-LTF mode;
generating an HE-LTF symbol by using an HE-LTF sequence corresponding to the determined channel bandwidth and the determined HE-LTF mode, wherein the HE-LTF sequence is among a plurality of HE-LTF sequences for the plurality of bandwidths and the plurality of HE-LTF modes; and
transmitting a high efficiency physical layer protocol data unit (HE PPDU) including the HE-LTF symbol, in the determined channel bandwidth,wherein the plurality of HE-LTF sequences includes a first HE-LTF sequence for the 20 MHz channel bandwidth and the 4×
HE-LTF mode, a second HE-LTF sequence for the 20 MHz channel bandwidth and the 2×
HE-LTF mode, a third HE-LTF sequence for the 40 MHz channel bandwidth and the 4×
HE-LTF mode, a fourth HE-LTF sequence for the 40 MHz channel bandwidth and the 2×
HE-LTF mode, a fifth HE-LTF sequence for the 80 MHz channel bandwidth and the 4×
HE-LTF mode, and a sixth HE-LTF sequence for the 80 MHz channel bandwidth and the 2×
HE-LTF mode.
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Abstract
In wireless communications, a first device may determine a channel bandwidth and a high efficiency long training field (HE-LTF) mode. The first device may generate an HE-LTF symbol by using an HE-LTF sequence corresponding to the determined channel bandwidth and HE-LTF mode. The first device may transmit, in the determined channel bandwidth, a high efficiency physical layer convergence procedure (PLCP) protocol data unit (HE PPDU) that includes the HE-LTF symbol. A second device may receive, in a channel bandwidth, a downlink HE PPDU that includes an HE-LTF symbol. The second device may obtain, from the HE-LTF symbol, an HE-LTF sequence corresponding to the channel bandwidth and an HE-LTF mode of the HE-LTF symbol. The downlink HE PPDU may be the HE PPDU from the first device. Other methods, apparatus, and computer-readable media are also disclosed.
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Citations
20 Claims
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1. An apparatus for facilitating wireless communication, the apparatus comprising:
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one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to cause; determining a channel bandwidth among a plurality of bandwidths including a 20 megahertz (MHz) channel bandwidth, 40 MHz channel bandwidth, and 80 MHz channel bandwidth; determining a high efficiency long training field (HE-LTF) mode among a plurality of HE-LTF modes including a 4×
HE-LTF mode and a 2×
HE-LTF mode;generating an HE-LTF symbol by using an HE-LTF sequence corresponding to the determined channel bandwidth and the determined HE-LTF mode, wherein the HE-LTF sequence is among a plurality of HE-LTF sequences for the plurality of bandwidths and the plurality of HE-LTF modes; and transmitting a high efficiency physical layer protocol data unit (HE PPDU) including the HE-LTF symbol, in the determined channel bandwidth, wherein the plurality of HE-LTF sequences includes a first HE-LTF sequence for the 20 MHz channel bandwidth and the 4×
HE-LTF mode, a second HE-LTF sequence for the 20 MHz channel bandwidth and the 2×
HE-LTF mode, a third HE-LTF sequence for the 40 MHz channel bandwidth and the 4×
HE-LTF mode, a fourth HE-LTF sequence for the 40 MHz channel bandwidth and the 2×
HE-LTF mode, a fifth HE-LTF sequence for the 80 MHz channel bandwidth and the 4×
HE-LTF mode, and a sixth HE-LTF sequence for the 80 MHz channel bandwidth and the 2×
HE-LTF mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for facilitating wireless communication, the apparatus comprising:
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one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to cause; receiving a downlink high efficiency physical layer protocol data unit (HE PPDU) including a high efficiency long training field (HE-LTF) symbol, in a channel bandwidth which is one of a plurality of bandwidths including 20 megahertz (MHz), 40 MHz, and 80 MHz; and obtaining, from the HE-LTF symbol, an HE-LTF sequence corresponding to the channel bandwidth and an HE-LTF mode of the HE-LTF symbol, wherein the HE-LTF mode is one of a plurality of HE-LTF modes including a 2×
HE-LTF mode and a 4×
HE-LTF mode,wherein, when the channel bandwidth is 40 MHz and the HE-LTF mode is 2×
HE-LTF mode, the HE-LTF sequence includes zero values on every odd subcarrier index from −
244 to −
4, non-zero values on every even subcarrier index from −
244 to −
4, a zero value on a subcarrier index of −
3, direct current (DC) tones on subcarrier indices from −
2 to 2, a zero value on a subcarrier index of 3, non-zero values on every even sub carrier index from 4 to 244, and zero values on every odd subcarrier index from 4 to 244. - View Dependent Claims (16, 17, 18)
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19. An apparatus for facilitating wireless communication, the apparatus comprising:
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one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to cause; determining a channel bandwidth among a plurality of bandwidths including a 20 megahertz (MHz) channel bandwidth, 40 MHz channel bandwidth, and 80 MHz channel bandwidth; determining a high efficiency long training field (HE-LTF) mode among a plurality of HE-LTF modes including a 4×
HE-LTF mode and a 2×
HE-LTF mode;generating an HE-LTF symbol by using an HE-LTF sequence corresponding to the determined channel bandwidth and the determined HE-LTF mode; and transmitting a high efficiency physical layer protocol data unit (HE PPDU) including the HE-LTF symbol, in the determined channel bandwidth, wherein, when the channel bandwidth is 40 MHz and the HE-LTF mode is the 2×
HE-LTF mode, the HE-LTF sequence includes zero values on every odd subcarrier index from −
244 to −
4, non-zero values on every even subcarrier index from −
244 to −
4, a zero value on a subcarrier index of −
3, direct current (DC) tones on subcarrier indices from −
2 to 2, a zero value on a subcarrier index of 3, non-zero values on every even sub carrier index from 4 to 244, and zero values on every odd subcarrier index from 4 to 244. - View Dependent Claims (20)
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Specification