US 12,120,025 B2 · Physical layer preamble design

Abstract

This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs that support gains in data throughput achievable in accordance with the IEEE 802.11 be amendment, and future generations, of the IEEE 802.11 standard. Among other examples, the preamble designs of the present implementations may allow for more reliable packet detection, more accurate channel estimation, and more robust decoding of signal field (SIG) symbols. Additionally, or alternatively, the preamble designs of the present disclosure may be implemented with different lengths, modulation schemes, or transmit power compared to preamble designs that conform to existing versions of the IEEE 802.11 standard.

Claims28

Dependent claims

A method for wireless communication by a wireless communication device comprising:

receiving a packet including a physical layer preamble that includes a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), a repeat of L-SIG (RL-SIG) that immediately follows L-SIG, and a universal signal field (U-SIG) that immediately follows RL-SIG and includes information for interpreting one or more subsequent fields of the packet, L-SIG including a length field having a value (L_LEN) that satisfies L_LEN mod 3 equals zero;
detecting a plurality of modulation schemes applied to U-SIG, wherein a first symbol of U-SIG is modulated according to a binary phase shift keying (BPSK) modulation scheme of the plurality of modulation schemes and a second symbol of U-SIG is modulated according to a quadrature BPSK (QBPSK) modulation scheme of the plurality of modulation schemes;
and
determining the second symbol of U-SIG is a repetition of the first symbol of U-SIG based on the first symbol being modulated according to the BPSK modulation scheme and the second symbol being modulated according to the QBPSK modulation scheme.

1 more element

A wireless communication device comprising:

one or more processors;
one or more memories coupled with the one or more processors;
and
one or more processor-readable instructions store in the one or more memories and executable by the one or more processors to cause the wireless communication device to:
receive a packet including a physical layer preamble that includes a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), a repeat of L-SIG (RL-SIG) that immediately follows L-SIG, and a universal signal field (U-SIG) that immediately follows RL-SIG and includes information for interpreting one or more subsequent fields of the packet, L-SIG including a length field having a value (L_LEN) that satisfies L_LEN mod 3 equals zero;
detect a plurality of modulation schemes applied to U-SIG, wherein a first symbol of U-SIG is modulated according to a binary phase shift keying (BPSK) modulation scheme of the plurality of modulation schemes and a second symbol of U-SIG is modulated according to a quadrature BPSK (QBPSK) modulation scheme of the plurality of modulation schemes;
and
determine the second symbol of U-SIG is a repetition of the first symbol of U-SIG based on the first symbol being modulated according to the BPSK modulation scheme and the second symbol being modulated according to the QBPSK modulation scheme.

5 more elements

A wireless communication device comprising:

one or more processors;
one or more memories coupled with the one or more processors;
and
one or more processor-readable instructions store in the one or more memories and executable by the one or more processors to cause the wireless communication device to:
generate a packet including a physical layer preamble that includes a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), a repeat of L-SIG (RL-SIG) that immediately follows L-SIG, and a universal signal field (U-SIG) that immediately follows RL-SIG and includes information for interpreting one or more subsequent fields of the packet, L-SIG including a length field having a value (L_LEN) that satisfies L_LEN mod 3 equals zero;
select a plurality of modulation schemes to apply to U-SIG to indicate a presence of a repetition of one or more symbols of U-SIG;
modulate a first symbol of the one or more symbols of U-SIG according to a binary phase shift keying (BPSK) modulation scheme of the plurality of modulation schemes;
modulate a second symbol of U-SIG according to a quadrature BPSK (QBPSK) modulation scheme of the plurality of modulation schemes based at least in part on the second symbol being a repetition of the first symbol;
and
transmit the packet over a wireless channel.

7 more elements

Dependencies are inferred from the claim text.

Physical layer preamble design

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Physical layer preamble design

Life of this patent

Abstract

Claims28