Method and apparatus for generating training signal using predetermined binary sequence in wireless lan system
AssigneeLG Electronics Inc.
InventorsEunsung PARK, Jinsoo CHOI, Hangyu CHO
Life of this patent
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Abstract
Disclosed are a method and an apparatus for generating an STF signal usable in a wireless LAN system. The STF signal is included in a field used to improve AGC estimation of a MIMO transmission. A portion of the STF signal is used to transmit an uplink, and can be used for uplink MU PPDUs transmitted from a plurality of STAs. The STF signal that is disclosed, for example, is used for a 40 MHz band or an 80 MHz band, is desirably usable for the 40 MHz band, and can be generated based on a sequence in which a predetermined M sequence is repeated. The predetermined M sequence can be a binary sequence of which the length is 15 bits.
Claims16
A method in a wireless local area network (LAN) system supporting multiple frequency bands including a first frequency band and a second frequency band, comprising:
- generating, by a transmitting apparatus, a short training field (STF) signal corresponding to the first frequency band;
- and
- transmitting, by the transmitting apparatus, a physical protocol data unit (PPDU) including the STF signal to a receiving apparatus,
- wherein the STF signal corresponding to the first frequency band is generated based on a sequence in which a predetermined M sequence is repeated,
- wherein the sequence corresponding to the STF signal is defined as shown below:
- {M,−1,−M,0,M,−1,M}*(1+j)/sqrt(2),
- wherein sqrt( ) denotes a square root, and
- wherein the predetermined M sequence corresponds to a binary sequence having a length of 15 bits and is defined as shown below:
- M={−1,−1,−1,1,1,1,−1,1,1,1,−1,1,1,−1,1}.
A transmitting apparatus of a wireless local area network (LAN) system, comprising:
- a radio frequency (RF) unit transmitting or receiving radio signals;
- and
- a processor controlling the RF unit,
- wherein the processor is configured:
- to generate a short training field (STF) signal corresponding to the first frequency band;
- and
- to transmit a physical protocol data unit (PPDU) including the STF signal to a receiving apparatus,
- wherein the STF signal corresponding to the first frequency band is generated based on a sequence in which a predetermined M sequence is repeated,
- wherein the sequence corresponding to the STF signal is defined as shown below:
- {M,−1,−M,0,M,−1,M}*(1+j)/sqrt(2),
- wherein sqrt( ) denotes a square root, and
- wherein the predetermined M sequence corresponds to a binary sequence having a length of 15 bits and is defined as shown below:
- M={−1,−1,−1,1,1,1,−1,1,1,1,−1,1,1,−1,1}.
Dependencies are inferred from the claim text.