Patent ID: 11942994
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The apparatus according to claim 14,
wherein the analysis module is configured to determine each spectral interference coefficient depending on:, Δ
   ⁢
   
    
     A
     λ
     XCI
    
    [
    μ
    ]
   
  
  =
  
   
    -
    j
   
   ⁢
   
    
     ϕ
     
      NL
      ,
      ν
     
    
    
     N
     DFT
     2
    
   
   ×
   
    
     ∑
     
      
       μ
       1
      
      ,
      
       μ
       2
      
     
    
    
     
      (
      
       
        
         
          B
          λ
         
         [
         
          μ
          1
         
         ]
        
        ⁢
        
         
          B
          λ
          H
         
         [
         
          μ
          2
         
         ]
        
       
       +
       
        
         
          B
          λ
          H
         
         [
         
          μ
          2
         
         ]
        
        ⁢
        
         
          B
          λ
         
         [
         
          μ
          1
         
         ]
        
        ⁢
        I
       
      
      )
     
     ×
     
      
       A
       λ
      
      [
      
       μ
       3
      
      ]
     
     ⁢
     
      
       H
       ν
      
      [
      
       
        μ
        1
       
       ,
       
        μ
        2
       
       ,
       
        μ
        3
       
      
      ]
     
    
   
  
 

wherein ΔAλXCI[μ] is said spectral interference coefficient,
wherein Bλ[μ1] is a first one of the three or more spectral coefficients,
wherein Bλ[μ2] is a second one of the three or more spectral coefficients,
wherein Aλ[μ3] is a third one of the three or more spectral coefficients,
wherein I indicates an identity matrix,
wherein H indicates Hermitian,
wherein μ1 is a first index which indicates a first one of the plurality of frequency channels,
wherein μ2 is a second index which indicates a second one of the plurality of frequency channels,
wherein μ3 is a third index which indicates a third one of the plurality of frequency channels,
wherein Hv[μ1, μ2, μ3] indicates the transfer function,
wherein NDFT2 indicates a square of a number of the plurality of frequency channels of the frequency domain,
wherein ϕNL, v is a number.