Patent ID: 11870500
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An optical receiver, comprising:
a processor and a memory;
wherein the memory stores computer instructions; and
wherein when executing the computer instructions in the memory, the processor is configured to:
obtain a to-be-processed signal block;
determine a prediction signal block corresponding to the to-be-processed signal block;
determine a noise compensation coefficient of the to-be-processed signal block based on the to-be-processed signal block and the prediction signal block; and
perform noise compensation on the to-be-processed signal block based on the noise compensation coefficient;
wherein the to-be-processed signal block comprises X1 to Xn symbols and Y1 to Yn symbols, wherein the X1 to X1 symbols are n symbols transmitted in a first time sequence in a first polarization signal, and the Y1 to Yn symbols are n symbols transmitted in a second time sequence in a second polarization signal, wherein n is an integer greater than or equal to 2; and
wherein the processor is configured to:
obtain Xn+1 to Xn+i−1 symbols and Yn+1 to Yn+j−1 symbols, wherein the Xn+1 to Xn+i−1 symbols are symbols following an Xn symbol that are transmitted in a third time sequence in the first polarization signal, and the Yn+1 to Yn+j−1 symbols are j−1 symbols following Yn that are transmitted in a fourth time sequence in the second polarization signal;
determine a first matrix and a second matrix, wherein the first matrix is [S1 S2 . . . Sn], the second matrix is, [
   
    
     
      
       X
       1
      
     
     
      
       X
       2
      
     
     
      
       X
       3
      
     
     
      
       
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       X
       n
      
     
    
    
     
      
       X
       2
      
     
     
      
       X
       3
      
     
     
      
       X
       4
      
     
     
     
     
      
       X
       
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       X
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       X
       
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        -
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       Y
       1
      
     
     
      
       Y
       2
      
     
     
      
       Y
       3
      
     
     
      
       
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       Y
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       Y
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       Y
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   ]
  
  ,
 

 and S1 to Sn are n symbols comprised in the prediction signal block and transmitted in a fifth time sequence, and each column of the second matrix comprises an initial symbol of the column, i−1 symbols related to the initial symbol of the respective column in the first polarization signal, the (i+1)th symbol of the respective column, and j−1 symbols related to the (i+1)th symbol in the second polarization signal, wherein n is greater than i+j, i is an integer greater than 1, and j is an integer greater than 1; and
multiply the first matrix by an inverse matrix of the second matrix, to obtain a noise compensation matrix comprising the noise compensation coefficient, wherein the noise compensation matrix is [h1, h2 . . . hm].