Hello, Does anyone know how to estimate the BER of a Viterbi decoder when p = |H|^2 * |r-x|^2 is used as the decision metric ? Thanks for your cooperation. Engin |H|^2 = Channel's kth coefficient in frequency domain r = received symbol x = transmitted symbol This message was sent using the Comp.DSP web interface on www.DSPRelated.com
OFDM BER Measure
Started by ●June 21, 2005
Reply by ●June 22, 20052005-06-22
Hello Engin, The Viterbi algo uses a least cost metric and this corresponds quite well to the bit error rate. In some implementations, it is twice the number of flawed bits. If you are using a soft metric it is still reasonably good. I'm not sure why you are mixing frequnecy and temporally based values for your metric though. Are you trying to say your data went through a matched filter or an echo canceller before applying the Viterbi process?