hello, in the course of a student research project i am going to realize a slim implementation of the WLAN 802.11a standard (consists of scrambler->trellis->interleaver->ofdm-modulator) based on gnuradio and GRC. in this case i tested (as a start) every single step for itself. so i get the scrambler, interleaver and ofdm-modulator working. and here is my problem: the idea is, to read out a text-file, send it over trellis encoder then over trellis viterbi an write back a text file with same content. i tried to build the following flow graph: [file_source]->[trellis encoder]->[trellis viterbi]->[file_sink] unfortunately the text_out file has not the same content as the text_in file (i am not even able to open the text-file). besides i do not know, what i must insert in the fsm line in configuration window. is there any documentation about generating fsm files and which one i have to enter for my application? i hope someone had the same problem and could help. best regards christoph b.
on 2009-06-08 08:21