viterbi decoder

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Abi Aarthy
Abi Aarthy el 20 de En. de 2012
decoder2=vitdec(decode2,trel,20,'cont','hard');
here the length of decode2 is 75 bits. but we are getting the error as:Length of the input code vector must be a multiple of the number of bits in an input symbol. please help us.

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Walter Roberson
Walter Roberson el 20 de En. de 2012
log2(trel.numInputSymbols) must evenly divide length(decode2)
http://www.mathworks.com/help/toolbox/comm/ref/vitdec.html
Each symbol in the vector decoded consists of log2(trellis.numInputSymbols) bits.
  2 comentarios
Abi Aarthy
Abi Aarthy el 21 de En. de 2012
sir,
we donot know how to implement this function"log2(trellis.numinputsymbols)".
Walter Roberson
Walter Roberson el 21 de En. de 2012
As I indicated at the beginning of my response,
log2(trel.numInputSymbols)
The trel here is the same as the trel variable you are passing as the second argument to vitdec .

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