# Tag Info

## Hot answers tagged viterbi-algorithm

Accepted

### Determining pulse shape for Viterbi Equalization

I'll answer my own question with what I've learned in the past 28 days. Hopefully I've got it right! Viterbi equalization is just one way to equalize the channel, as an alternative to some other ...
• 417
Accepted

### Help understanding ka9q viterbi27 streaming operation

Asked and Answered :-) So, the second problem was in the calculation of the "best-state" starting state. The test codes passes "-1" to the chainback function to request it starts at the "best" state, ...
Accepted

### Decoding final bits with viterbi

You do not need any additional bits to help the decoder converge. There should be no need for convergence at the boundaries, because the start and end states are completely known (the all zeros state)...
• 12.1k
1 vote

### GnuRadio CC Decoder or How to use FEC Extended Decoder

By the way, since the CC encoder is transparent, you could also correlate against a pre-CC-encoded version of the ASM. It's a bit trickier, but saves you 3dB if you use it instead of differential ...
1 vote

### Why does the flat part of the BER curve appear after the Viterbi decoder (MatLab)?

I agree with Marcus Müller. In Monte Carlo simulations, due to the limited amount of trials, after a point, you come up with an error floor. To overcome this, the only way is to increase the number of ...
• 423
1 vote

### Why does the flat part of the BER curve appear after the Viterbi decoder (MatLab)?

while numErrsSoft < 100 && numBits < 1e7 Nope, you can't stop after 10⁷ bits if you're after error rates < 10⁻⁶. That means you expect to see ...
• 31.3k
1 vote
Accepted

### Applying Viterbi algorithm to compensate for ISI in PSK31

(After some deliberation, I have a guess at answering my own question. Someone tell me if I'm wrong.) The first step is to look at the contribution of each pulse at the decision point. The filter is ...
• 417
1 vote
Accepted

### Viterbi Decoder without traceback

A register exchange method implementation of Viterbi decoder avoids trace back and a nominal initial delay (one time delay or boot up delay) is unavoidable. But this method requires more memory ...
• 81

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