Patent ID: 11862194
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 9:
10. The data storage system of claim 1, further comprising a data-dependent noise mean calculator configured to estimate a data-dependent noise mean from the filtered signal, each of the one or more branch metric calculations comprising:, m
    k
   
   =
   
    
     [
     
      
       
        (
        
         
          y
          k
         
         -
         
          
           s
           ˆ
          
          k
         
        
        )
       
       ⁢
       
        (
        
         1
         -
         
          
           
            ∑
             
           
           
            i
            =
            1
           
           J
          
          ⁢
          
           p
           i
          
          ⁢
          
           D
           i
          
         
        
        )
       
      
      -
      μ
     
     ]
    
    2
   
  
  ,, where mk is the branch metric, yk is the signal input to the estimator, ŝk is the estimated signal, J is a highest order of the applicable noise whitening filter, pi are filter parameters of the applicable noise whitening filter, D represents a delay corresponding to a bit duration, and μ is the data-dependent noise mean.