CONVOLUTIONAL CODING

CDMA Glossary

CDMA — Convolutional Coding

 

 

 

 

 

 

Argos Home

 

 		 
 


Information on Convolutional Coding

Convolutional coding extends the concept of a block code to allow memory from block to block. Each encoded symbol is therefore a linear combination of information symbols in the current block and a selected number of preceding blocks.
     In convolutional coding the encoder operates not on disjoint blocks, but on a running block of bits held in a shift register, generating a sequence of higher rate. This procedure is normally used for error detection and correcting, but the correcting capabilities are not so easily quantified as for block codes. Probabilistic decoding, approximating maximum likelihood, is generally used.
     CDMA uses a half-rate convolutional coder, whose output data rate is twice the input data rate.


Other topics in our resources on CDMA related to Convolutional Coding include: 
 
  • Channel coding
    		•

     

    Please contact Argos Press if you would like to propose other entries to extend our glossary. Please contact Argos Press for information on licensing our content (such as this glossary entry on Convolutional Coding). © Argos Press Pty Ltd, Canberra, 2003-2004. All rights reserved.