Patent ID: 11909563
Assignee: BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 2:
3. The method according to claim 1, wherein converting, according to the preset matrix conversion method, the real-and-imaginary-part feature matrix into the amplitude-and-phase feature matrix comprises:
converting the real-and-imaginary-part feature matrix into the amplitude-and-phase feature matrix by means of the following formula:, A
    =
    
      
        
          I
          2
        
        +
        
          Q
          2
        
      
    
  

  
    P
    =
    
      arctan
      ⁢
      
        Q
        I
      
    
  

wherein, A represents the amplitude of the to-be-recognized signal, P represents the phase of the to-be-recognized signal, I represents the real part of the to-be-recognized signal, and Q represents the imaginary part of the to-be-recognized signal.