Safran CORTEX Series User Manual page 5

2.2.3.2 I/Q merged output ................................................................................................................................... 74
2.2.3.3 Split 2 output (I and Q normal output) .................................................................................................... 74
2.2.3.4 Split 4 output ........................................................................................................................................... 75
2.2.3.5 CADU output formats ............................................................................................................................. 75
2.2.4 Specific I/Os (Customers requirements) .................................................................................................... 76
3 FUNCTIONAL DESCRIPTION ....................................................................................................................... 77
3.1 M & C
ONITORING
3.1.1 Monitoring.................................................................................................................................................. 77
3.1.2 Control ....................................................................................................................................................... 77
3.2 L ....................................................................................................................................................... 77
OGGING
3.3 D ............................................................................................................................................ 78
EMODULATION
3.3.1 IF Processing ............................................................................................................................................. 78
3.3.2 Bit Synchronization .................................................................................................................................... 78
3.3.2.1 Signal Processing .................................................................................................................................... 78
3.3.2.2 Customized FIR Filters ........................................................................................................................... 79
3.3.2.2.1 General ................................................................................................................................................. 79
3.3.2.2.2 Custom Filters Programming ............................................................................................................... 79
3.3.2.3 DEAF Filtering ....................................................................................................................................... 80
3.3.2.3.1 General ................................................................................................................................................. 80
3.3.2.3.2 Principle of the DEAF.......................................................................................................................... 81
3.3.2.3.3 Use of the DEAF .................................................................................................................................. 81
3.3.2.4 XDEAF for reception of dual polarization data transmission ................................................................. 83
3.3.2.5 Adjacent channel rejection ...................................................................................................................... 85
3.3.3 Viterbi Convolutional Decoding ................................................................................................................ 86
3.3.3.1 General .................................................................................................................................................... 86
3.3.3.2 Single or Dual Viterbi Decoder .............................................................................................................. 87
3.3.3.3 Parallel Viterbi decoders ......................................................................................................................... 88
3.3.3.4 Punctured Viterbi .................................................................................................................................... 89
3.3.4 PCM Decoding ........................................................................................................................................... 91
3.3.4.1 DNRZ, QPSK Decoding (DQPSK) ........................................................................................................ 91
3.3.4.1.1 CCSDS Recommended DNRZ Code in QPSK Mode ......................................................................... 91
3.3.4.1.2 Other Possibilities for DNRZ Codes in QPSK Mode .......................................................................... 92
3.3.4.1.3 DQPSK Configuration ......................................................................................................................... 92
3.3.4.2 DNRZ, OQPSK Decoding ...................................................................................................................... 93
3.3.4.2.1 Most Commonly Used DNRZ Code in OQPSK Mode ....................................................................... 93
3.3.4.2.2 Other Possibilities for DNRZ Codes in OQPSK Mode ....................................................................... 94
3.3.4.2.3 DOQPSK configuration ....................................................................................................................... 94
3.3.5 I/Q Shift Compensation in OQPSK Mode .................................................................................................. 95
3.3.6 CCITT V.35 De-scrambler ......................................................................................................................... 95
3.3.7 BEM: 4D-8PSK-TCM-DVB-S Reed Solomon Decoding ............................................................................ 95
3.3.7.1 Introduction ............................................................................................................................................. 95
3.3.7.2 4D-8PSK-TCM Coder ............................................................................................................................ 96
3.3.7.2.1 Differential Coder ................................................................................................................................ 97
3.3.7.2.2 Convolutional Coder ............................................................................................................................ 98
3.3.7.2.3 Constellation Mapper for 4D-8PSK-TCM ........................................................................................... 99
3.3.7.2.4 Coder/Mapper Implementation at 2, 2.25, 2.5 & 2.75 bits/channel-symbol Efficiency .................... 102
3.3.7.3 DVB-S Transport Layer: Reed Solomon Code ..................................................................................... 104
3.3.7.3.1 Synchronized Randomization ............................................................................................................ 104
3.3.7.3.2 Reed-Solomon encoding .................................................................................................................... 105
3.3.7.3.3 Packets interleaving and synchronization byte insertion ................................................................... 105
3.3.7.3.4 Interface between Trellis Coded Symbols and Bytes ........................................................................ 107
© Safran Data Systems - IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
............................................................................................................................ 77
ONTROL
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Is.Rev
Date:
Safran Data Systems
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DTU 100782
3.5
June 1, 2021
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