Quantization levels of received symbol for viterbi decoder

[sunil]

i am designing viterbi decoder. i have one problem. i am doing 3bit
quantiser for quantizing the received symbols(noise addedsymbols). but
my problem is from which number to which number i have to take as
quantization level. either from 0 to 7 or -3 to 4. depending on those
the branch metric is varying. which will give minimum metric as best
metric. i am planning to calculate hamming distance.
if any body have the idea on this please mail me.
thank u.
bye

 

[Oleg]

inaganti_suni@yahoo.com (sunil) wrote in message news:<9f28d282.0401080128.3a9ab0b@posting.google.com>...

i am designing viterbi decoder. i have one problem. i am doing 3bit
quantiser for quantizing the received symbols(noise addedsymbols). but
my problem is from which number to which number i have to take as
quantization level. either from 0 to 7 or -3 to 4. depending on those
the branch metric is varying. which will give minimum metric as best
metric. i am planning to calculate hamming distance.
if any body have the idea on this please mail me.
thank u.
bye

Hi,
I am designing the same as you. If you plane to use Hamming distance
then definitely use [0:7]. I have tested it and compared with Matlab's
Viterbi.
Good luck