Quasonix RDMS, Инструкция по установке и эксплуатации

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3
rd
Generation Rack-
Mount RDMS™
138 Quasonix, Inc.
Figure 232: Advanced Settings Window, FM De-emphasis
4.5.3.4 Forward Error Correction
Forward Error Correction (FEC) may be accomplished by using Low-Density Parity Check (LDPC) encoding, in
SOQPSK or STC modes, as shown in Figure 233 and in Figure 234, or by using a convolutional encoding/Viterbi
decoding, and/or ReedSolomon encoding in legacy PSK modes (BPSK, QPSK, OQPSK, AQPSK, AUQPSK, or
UQPSK), as shown in Figure 235.
All of these forms of FEC are discussed in detail in the associated front panel sections: LDPC in section 4.4.2.22.1,
Viterbi Decoder in section 4.4.2.22.2, Convolutional Symbol in section 4.4.2.22.3, Reed-Solomon Decoder in
section 4.4.2.22.4, and Interleave Depth in section 4.4.2.22.5.
LDPC Code always displays in the Forward Error Correction window when the waveform Mode is SOQPSKLDPC
or STCLDPC.
Figure 233: Forward Error Correction Window when in SOQPSKLDPC or SOQPSKSTC Mode
Select the desired encoding format from the drop down menu, as shown in Figure 234.
Figure 234: Forward Error Correction Window, LDPC Mode Drop Down Menu