[Commit-gnuradio] git://gnuradio.org/jcorgan branch, wip/fec, created. 3.3git-592-g106c52f

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        at  106c52fc722f9c9b44e794c39290f1374610ebe6 (commit)

- Log -----------------------------------------------------------------
commit 106c52fc722f9c9b44e794c39290f1374610ebe6
Author: Johnathan Corgan <address@hidden>
Date:   Thu Jan 21 16:36:42 2010 -0800

    gnuradio-core: created fec convenience library, new blocks
    
    gri_conv_encode_*            - convolutional encoder core routines
    gr_conv_encoder_r2k7_1b2b.*  - R1/2, K=7 streaming encoder
    
    The block namespace suffix 1b2b means the 2 output bits per input bit
    are written sequentially as symbols 0 or 1.  For the case of mapping these 
bits
    to QPSK symbols (0, 1, 2, 3) instead, the suffix will be 1b1m ('m' for 
symbol).
    
    The r2k7 encoder block with the Voyager code constants will replace the 
existing
    gr.ccsds_encoder_27_bb (which happens not to be the official CCSDS coding 
scheme.)
    
    The QA code tests the new encoder with the Voyager code against Karn's 
viterbi
    decoder.
    
    Ultimately, a new Viterbi decoder for R2K7 codes will be written, with I/O 
signatures
    more suitable for use in demodulation flowgraphs.

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