Wireless apparatus for high-efficiency (HE) communication with additional subcarriers
First Claim
1. A wireless apparatus configured for operation as a high-efficiency (HE) station (HE-STA), the apparatus comprising:
- memory; and
processing circuitry configured to;
decode a legacy signal field (L-SIG) of a HE data unit, the L-SIG comprising four reference subcarriers, the four reference subcarriers comprising two subcarriers at each edge a 20 MHz channel; and
decode a HE-signal field (HE-SIG-A) of the HE data unit, the HE-SIG-A comprising a total number of data subcarriers including four data subcarriers corresponding in frequency to the four reference subcarriers of the L-SIG, the four data subcarriers comprising two subcarriers at each edge of the 20 MHz channel,wherein the four reference subcarriers of the L-SIG are in addition to a legacy number of data subcarriers included in the L-SIG.
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Accused Products
Abstract
Embodiments of an access point and method for high-efficiency WLAN (HEW) communication are generally described herein. In some embodiments, the access point may be configured to operate as a master station and may configure an HEW frame to include a legacy signal field (L-SIG), an HEW signal field (HEW SIG-A) following the L-SIG, and one or more HEW fields following the HEW SIG-A. The L-SIG may be configured for transmission using a legacy number of data subcarriers, a legacy number of pilot subcarriers and a number of additional reference subcarriers modulated with a known reference sequence. At least one symbol of the HEW SIG-A and the one or more HEW fields following the HEW SIG-A of the HEW frame may be configured for transmission using additional data subcarriers. The additional data subcarriers may correspond to the additional reference subcarriers of the L-SIG.
100 Citations
22 Claims
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1. A wireless apparatus configured for operation as a high-efficiency (HE) station (HE-STA), the apparatus comprising:
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memory; and processing circuitry configured to; decode a legacy signal field (L-SIG) of a HE data unit, the L-SIG comprising four reference subcarriers, the four reference subcarriers comprising two subcarriers at each edge a 20 MHz channel; and decode a HE-signal field (HE-SIG-A) of the HE data unit, the HE-SIG-A comprising a total number of data subcarriers including four data subcarriers corresponding in frequency to the four reference subcarriers of the L-SIG, the four data subcarriers comprising two subcarriers at each edge of the 20 MHz channel, wherein the four reference subcarriers of the L-SIG are in addition to a legacy number of data subcarriers included in the L-SIG. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a wireless device configured for operation as a high-efficiency (HE) station (HE-STA), the instructions to configure the device to perform operations to:
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decode a legacy signal field (L-SIG) of a HE data unit, the L-SIG comprising four subcarriers modulated with a known reference sequence, the four subcarriers being in addition to a legacy number of data subcarriers, the four subcarriers comprising two subcarriers at each edge a 20 MHz channel; and decode a HE-signal field (HE-SIG-A) of the HE data unit, the HE-SIG-A comprising a total number of data subcarriers including four data subcarriers corresponding in frequency to the four subcarriers of the L-SIG, the four data subcarriers comprising two subcarriers at each edge of the 20 MHz channel. - View Dependent Claims (15, 16)
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17. A wireless apparatus configured for operation as a high-efficiency (HE) station (HE-STA), the apparatus comprising
memory; - and
processing circuitry to generate a HE data unit for transmission on a 20 MHz channel, the HE data unit comprising a plurality of fields, wherein to generate the HE data unit, the processing circuitry is configured to; encode a legacy long training field (L-LTF) of the HE data unit, the L-LTF comprising a legacy number of reference subcarriers; encode a legacy signal field (L-SIG) of the HE data unit, the L-SIG to follow the L-LTF, the L-SIG comprising four reference subcarriers and a legacy number of data subcarriers, the four reference subcarriers comprising two subcarriers at each edge of the 20 MHz channel; encode a HE-signal field (HE-SIG-A) of the HE data unit, the HE-SIG-A comprising a total number of data subcarriers including four data subcarriers corresponding in frequency to the four reference subcarriers of the L-SIG; and configure a subcarrier power allocation of the subcarriers of the L-SIG and the HE-SIG-A so that the L-SIG has a same total power as the L-LTF and that the HE-SIG-A has the same total power as the L-LTF, for transmission of the L-SIG and the HE-SIG-A on the 20 MHz channel. - View Dependent Claims (18, 19, 20, 21)
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22. A wireless apparatus configured for operation as a high-efficiency (HE) station (HE-STA), the apparatus comprising
memory; - and
processing circuitry configured to; decode a training field of a data unit; decode a first signal field following the training field of the data unit, the first signal field comprising four reference subcarriers and a plurality of data subcarriers, the four reference subcarriers comprising two subcarriers at each edge a 20 MHz channel; and decode a second signal field of the data unit, the second signal field comprising a total number of data subcarriers including four data subcarriers corresponding in frequency to the four reference subcarriers of the first signal field, wherein a channel estimate based on the four reference subcarriers of the first signal field is used decode the four corresponding data subcarriers of the second signal field, and wherein a channel estimate based on reference subcarriers of the training field is used to decode the data subcarriers of the first signal field and corresponding data subcarriers of the second signal field.
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Specification