GSoC14 Midterm evaluation is happening right now.
And I have some news regarding the viterbi decoder.
Benchmarks for the Calculation of the branch metrics have yield good results.
I made some quick flowgraph benchmarks for QPSK and BPSK Branch Metrics
I will have a closer look on this with my mentor. Also the kernel needs 128bit aligned memory right now, as it is performing a matrix operation and a row length that is not a multiple of 4 (floats) will segfault when trying to perform an aligned store.
Next on my To-Do List are also the State Metrics and LLR Calculations for the SISO Decoder.
Code is all on www.github.com/spectrejan
 Phil Karns FEC Library http://www.ka9q.net/code/fec/