trellis

How does trellis coded modulation (TCM) work?

I'm having a hard time understanding TCM. I've been trying to decipher this explanation, but I'm not having much luck. I'm not looking for lots of detail, just the basics of TCM encoding and decoding. A simple example of encoding and decoding a short string would great! Thanks! ...

Viterbi decoder

Hi, Does anyone know for any good resource on the web or book where the explanation for Viterbi decoder or a tutorial on how to decode a received bit sequence by using trellis diagram could be found? Thanks! ...