GNU Radio 2.x: gr_simple_framer_sync.h Source File

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# gr_simple_framer_sync.h

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    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2004,2005 Free Software Foundation, Inc.
    00004  *
    00005  * This file is part of GNU Radio
    00006  *
    00007  * GNU Radio is free software; you can redistribute it and/or modify
    00008  * it under the terms of the GNU General Public License as published by
    00009  * the Free Software Foundation; either version 2, or (at your option)
    00010  * any later version.
    00011  *
    00012  * GNU Radio is distributed in the hope that it will be useful,
    00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015  * GNU General Public License for more details.
    00016  *
    00017  * You should have received a copy of the GNU General Public License
    00018  * along with GNU Radio; see the file COPYING.  If not, write to
    00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023 #ifndef INCLUDED_GR_SIMPLE_FRAMER_SYNC_H
    00024 #define INCLUDED_GR_SIMPLE_FRAMER_SYNC_H
    00025
    00026 /*
    00027  * Here are a couple of maximum length sequences (m-sequences) that were generated by the
    00028  * the "mseq" matlab/octave code downloaded from:
    00029  * http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=990&objectType=file
    00030  *
    00031  * 31-bit m-sequence:
    00032  *      0110100100001010111011000111110
    00033  *      0x690AEC76 (padded on right with a zero)
    00034  *
    00035  * 63-bit m-sequence:
    00036  *      101011001101110110100100111000101111001010001100001000001111110
    00037  *      0xACDDA4E2F28C20FC (padded on right with a zero)
    00038  */
    00039
    00040 static const unsigned long long GRSF_SYNC = 0xacdda4e2f28c20fcULL;
    00041
    00042 static const int GRSF_BITS_PER_BYTE = 8;
    00043 static const int GRSF_SYNC_OVERHEAD = sizeof(GRSF_SYNC);
    00044 static const int GRSF_PAYLOAD_OVERHEAD = 1;                     // 1 byte seqno
    00045 static const int GRSF_TAIL_PAD = 1;                             // one byte trailing padding
    00046 static const int GRSF_OVERHEAD = GRSF_SYNC_OVERHEAD + GRSF_PAYLOAD_OVERHEAD + GRSF_TAIL_PAD;
    00047
    00048
    00049 #endif /* INCLUDED_GR_SIMPLE_FRAMER_SYNC_H */