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Diffstat (limited to 'gr-atsc/README.signal_flow')
| -rw-r--r-- | gr-atsc/README.signal_flow | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/gr-atsc/README.signal_flow b/gr-atsc/README.signal_flow deleted file mode 100644 index eee83a484..000000000 --- a/gr-atsc/README.signal_flow +++ /dev/null @@ -1,41 +0,0 @@ -This describes the signal flow through the gnuradio-0.9 ATSC Transmitter -and Receiver programs. - -ATSC Transmitter -================ - -module input output notes --------------------- ---------------- ------------------- -------- -VrFileSource "MPEG transport stream" atsc_mpeg_packet -GrAtscRandomizer atsc_mpeg_packet atsc_mpeg_packet_no_sync whiten data with LFSR -GrAtscRSEncoder atsc_mpeg_packet_no_sync atsc_mpeg_packet_rs_encoded Reed-Soloman encoder -GrAtscInterleaver atsc_mpeg_packet_rs_encoded atsc_mpeg_packet_rs_encoded convolutional interleaver -GrAtscTrellisEncoder atsc_mpeg_packet_rs_encoded atsc_data_segment trellis encoder -GrAtscFieldSyncMux atsc_data_segment atsc_data_segment add in field syncs -GrAtscSymbolMapper atsc_data_segment float map [0,7] to +/- {1,3,5,7} and add pilot -GrWeaverModHead float float,float front half of Weaver VSB modulator -GrFIRfilterFFF (2x) float float low pass root raised cosine (matched filter) -GrWeaverModTail float,float short back half of Weaver VSB modulator -VrFileSink short "16-bit passband data" - - -ATSC Receiver -============= - -module input output notes --------------------- ---------------- ------------------- ------- -VrFileSource "16-bit passband data" short -GrConvertSF short float convert short to float -GrFIRfilterFFF float float band pass root raised cosine centered at IF freq (matched filter) -GrAtscFPLL float float carrier tracking freq and phase lock loop with down converting mixer -GrFIRfilterFFF float float low pass to kill unwanted mixer image -GrRemoveDcFFF float float remove DC offset prior to symbol timing module -GrAtscBitTimingLoop3 float float,syminfo track symbol & segment timing and do fractional interpolation -GrAtscFieldSyncChecker float,syminfo float,syminfo look for field sync patterns -GrAtscEqualizer float,syminfo float,syminfo LMS equalizer -GrAtscFieldSyncDemux float,syminfo atsc_soft_data_segment remove field syncs and pack into data segments -GrAtscViterbiDecoder atsc_soft_data_segment atsc_mpeg_packet_rs_encoded Viterbi decoder (12 seg delay) -GrAtscDeinterleaver atsc_mpeg_packet_rs_encoded atsc_mpeg_packet_rs_encoded convolutional de-interleaver (52 seg delay) -GrAtscRSDecoder atsc_mpeg_packet_rs_encoded atsc_mpeg_packet_no_sync Reed-Solomon decoder -GrAtscDerandomizer atsc_mpeg_packet_no_sync atsc_mpeg_packet de-whiten with LFSR -VrFileSink atsc_mpeg_packet "MPEG transport stream" |