Patent ID: 11929862
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A transmitting device for transmitting a Physical Protocol Data Unit (PPDU) in a wireless LAN system, the transmitting device comprising:
a memory;
a transceiver; and
a processor being operatively coupled to the memory and the transceiver,
wherein the processor is configured to:
generate the PPDU, wherein the PPDU includes a legacy preamble and a data field, and
transmit the PPDU to a receiving device,
wherein the legacy preamble includes a Legacy-Short Training Field (L-STF) and a Legacy-Long Training Field (L-LTF),
wherein the legacy preamble is generated by applying a first phase rotation value for a 320 MHz band, and
wherein the first phase rotation value is given as follows based on a subcarrier index k:, subcarrier
   ⁢
      
   index
   ⁢
      
   k
  
  =
  
   {
   
    
     
      
       
        1
        ,
       
      
      
       
        k
        <
        
         -
         448
        
       
      
     
     
      
       
        
         -
         1
        
        ,
       
      
      
       
        
         -
         448
        
        ≤
        k
        <
        
         -
         256
        
       
      
     
     
      
       
        1
        ,
       
      
      
       
        
         -
         256
        
        ≤
        k
        <
        
         -
         192
        
       
      
     
     
      
       
        
         -
         1
        
        ,
       
      
      
       
        
         -
         192
        
        ≤
        k
        <
        0
       
      
     
     
      
       
        
         -
         1
        
        ,
       
      
      
       
        0
        ≤
        k
        <
        64
       
      
     
     
      
       
        1
        ,
       
      
      
       
        64
        ≤
        k
        <
        256
       
      
     
     
      
       
        
         -
         1
        
        ,
       
      
      
       
        256
        ≤
        k
        <
        320
       
      
     
     
      
       
        1
        ,
       
      
      
       
        k
        ≥
        320
       
      
     
    
    .