Wavecom W-BitView V2.5.00 - Manual (Page 66)

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Custom Library BitView Manual V2.5.00 WAVECOM W-BV
themselves as they are delivered with all necessary source and project files. For more details refer to the
paragraph below, “
Want to Roll Your Own functions? ”.
Symbol Transcoding
In: STANAG-4285 8PSK symbols (3 bits/symbol)
Out: Transcoded STANAG-4285 bit stream
Function:
Maps a STANAG-4285 8PSK, i.e., 3 bits/symbol, bit stream to the appropriate bit(s) according to the data
rate dependent STANAG-4285 transcoding tables. Use Data rate for transcoding to select the
appropriate data rate and Symbol endianness to select Little or Big endian representation. The
following tables give the mapping between STANAG-4285 8PSK symbols and the corresponding bit
sequences for each data rate:
1200 bps (BPSK)
Bit Symbol
0 0,1,7,6
1 4,3,5,2
2400 bps (QPSK)
Dibit Symbol
00 0,1
01 2,3
10 6,7
11 4,5
3600 bps (8PSK)
Tribit Symbol
000 1
001 0
010 2
011 3
100 6
101 7
110 5
111 4
STANAG-4285 Deinterleaver
In: Descrambled STANAG-4285 bit stream
Out: De-interleaved STANAG-4285 bit stream