Patent ID: 11909566
Assignee: SOOCHOW UNIVERSITY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The method for designing a complex-valued channel equalizer according to claim 5, wherein a specific process “a new search direction is designed by superimposing a plurality of directions, at the tth iteration, multiple memory sizes can be selected, so that a plurality of directions are calculated, and then these directions are superimposed to obtain the search direction at the current iteration” is:
given a positive integer K, calculating an average memory size according to K memory sizes mw1*, mw2*, . . . , mwK* selected at the wth iteration,, m
     _
    
    w
   
   =
   
    
     
      m
      
       w
       ⁢
       1
      
      *
     
     +
     
      m
      
       w
       ⁢
       2
      
      *
     
     +
     ⋯
     +
     
      m
      wK
      *
     
    
    K
   
  
  ,
 

calculating the predicted value, m
   
    f
    ,
    t
   
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  =
  
   
    
     
      m
      _
     
     
      t
      -
      W
     
    
    +
    
     
      m
      _
     
     
      t
      -
      W
      +
      1
     
    
    +
    ⋯
    +
    
     
      m
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      t
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      1
     
    
   
   W, of the memory size at the current iteration by using an average value mW (w=t−W, t−W+1, . . . , t−1) of memory sizes in the previous W iterations;
adjusting M according to the predicted value by using the foregoing adaptive adjustment method; and
calculating K memory sizes at the tth iteration according to the modified M, to obtain K directions, and then superimposing these directions to obtain the search direction at the current iteration.