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

Claim 18:
19. The apparatus according to claim 14,
wherein the analysis module is configured to determine each spectral interference coefficient depending on:, Δ
   ⁢
   
    
     A
     λ
     SCI
    
    [
    μ
    ]
   
  
  =
  
   
    -
    j
   
   ⁢
   
    
     ϕ
     
      NL
      ,
      ρ
     
    
    
     N
     
      D
      ⁢
      F
      ⁢
      T
     
     2
    
   
   ×
   
    
     ∑
     u
    
    
     
      
       A
       λ
      
      [
      
       μ
       1
      
      ]
     
     ⁢
     
      
       A
       λ
       H
      
      [
      
       μ
       2
      
      ]
     
     ⁢
     
      
       A
       λ
      
      [
      
       μ
       3
      
      ]
     
     ⁢
     
      
       H
       ρ
      
      [
      
       
        μ
        1
       
       ,
       
        μ
        2
       
       ,
       
        μ
        3
       
      
      ]
     
    
   
  
 

wherein ΔAλXCI[μ] is said spectral interference coefficient,
wherein Aλ[μ1] is a first one of the three or more spectral coefficients,
wherein Aλ[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 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 Hρ[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,
wherein

u={[μ1,μ2]T|μ2≠μ1∧μ2≠μ3}