Viterbi error rate


In digital transmission, the Viterbi error rate, also known as the Viterbi bit error rate, is a measurement of error in the transmission of digital Information after the original signal has been corrected for errors and aberrations, usually noise and/or distortion. The value of the VBER is directly linked to the quality of the Channel Bit Error Rate, a measurement of the strength & quality of the original signal.

Example

Here is an example of transmitted digital code.
1 0 1 0 1
The following, distorted signal is received.
1 1 0 1 0
The VBER is determined by dividing the number of incorrectly received digits, or bits,, by the total number of bits received.
So, in this case, the VBER is equal to 4/5 which equals 0.8, or 80%. That is, 80% of the bits were incorrectly received. Except for extreme cases of interference, a signal can be completely corrected and thus achieve a VBER of 0. That is, a signal with 0 post correction errors can be achieved.