Ryan Malloy 0e77373ea4 Add uplink chain: DSKY command encoder to RF and back ...

Uplink word codec (uplink_word_codec.py):
- UplinkSerializerEngine: (channel, value) pairs to 15-bit NRZ bit stream
  with configurable inter-word gap for UPRUPT timing
- UplinkDeserializerEngine: two-phase state machine (acquisition + fixed
  framing) recovers words from NRZ bits, handles leading-zero data words
- GR wrappers: uplink_word_serializer (sync_block source) and
  uplink_word_deserializer (basic_block sink with message output)

TX source (usb_uplink_source.py):
- hier_block2 wiring: word_serializer -> nrz_encoder -> FM mod (4 kHz dev)
  -> 70 kHz upconvert -> complex_to_real -> PM mod (1.0 rad) -> [AWGN]
- Message input "words" forwards PDUs from uplink_encoder

RX receiver (usb_uplink_receiver.py):
- hier_block2 wiring: PM demod -> subcarrier_extract (70 kHz, 20 kHz BW)
  -> quadrature_demod -> matched filter -> decimate -> slicer -> deserializer
- Message output "commands" emits recovered (channel, value) PDUs

GRC block definitions for both source and receiver.

Loopback demo (uplink_loopback_demo.py):
- Encodes V16N36E, serializes with pure-Python engine, runs through GR RF
  chain (FM + PM + noise + demod), deserializes, compares TX vs RX words

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..

__init__.py

Add FM downlink mode: carrier blocks, convenience wrappers, and loopback demo

2026-02-24 10:18:42 -07:00

agc_bridge.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

bpsk_demod.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

bpsk_subcarrier_demod.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

bpsk_subcarrier_mod.py

Add transmit chain: 6 composable GR source blocks mirroring CuriousMarc bench

2026-02-21 18:55:50 -07:00

constants.py

Add FM downlink mode: carrier blocks, convenience wrappers, and loopback demo

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downlink_decoder.py

Implement full Apollo USB downlink decoder chain

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fm_demod.py

Add FM downlink mode: carrier blocks, convenience wrappers, and loopback demo

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fm_downlink_receiver.py

Add FM downlink mode: carrier blocks, convenience wrappers, and loopback demo

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fm_mod.py

Add FM downlink mode: carrier blocks, convenience wrappers, and loopback demo

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fm_signal_source.py

Add FM downlink mode: carrier blocks, convenience wrappers, and loopback demo

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fm_voice_subcarrier_mod.py

Add SCO modulator, external audio input, and demo scripts

2026-02-22 13:01:48 -07:00

nrz_encoder.py

Add transmit chain: 6 composable GR source blocks mirroring CuriousMarc bench

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pcm_demux.py

Implement full Apollo USB downlink decoder chain

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pcm_frame_source.py

Add transmit chain: 6 composable GR source blocks mirroring CuriousMarc bench

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pcm_frame_sync.py

Implement full Apollo USB downlink decoder chain

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pm_demod.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

pm_mod.py

Add transmit chain: 6 composable GR source blocks mirroring CuriousMarc bench

2026-02-21 18:55:50 -07:00

protocol.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

sco_demod.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

sco_mod.py

Add SCO modulator, external audio input, and demo scripts

2026-02-22 13:01:48 -07:00

subcarrier_extract.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

uplink_encoder.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

uplink_word_codec.py

Add uplink chain: DSKY command encoder to RF and back

2026-02-24 14:17:58 -07:00

usb_downlink_receiver.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

usb_signal_gen.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00

usb_signal_source.py

Add transmit chain: 6 composable GR source blocks mirroring CuriousMarc bench

2026-02-21 18:55:50 -07:00

usb_uplink_receiver.py

Add uplink chain: DSKY command encoder to RF and back

2026-02-24 14:17:58 -07:00

usb_uplink_source.py

Add uplink chain: DSKY command encoder to RF and back

2026-02-24 14:17:58 -07:00

voice_subcarrier_demod.py

Implement full Apollo USB downlink decoder chain

2026-02-20 13:18:42 -07:00