gr-rylr998

2 Commits 1 Branch 0 Tags

Author	SHA1	Message	Date
Ryan Malloy	3660f139ec	Add channelizer and fix FrameSync for real SDR captures - Add Channelizer class for wideband capture processing (2 MHz → 125 kHz) - FIR low-pass filter with scipy.firwin (or fallback windowed-sinc) - Proper decimation for anti-aliasing - Fix FrameSync preamble detection to accept any CFO - Real captures have significant carrier frequency offset - Preamble bins appear at arbitrary values, not just near 0 - Now accepts any strong signal as first preamble, validates consistency - Add decode_capture.py example script for processing raw BladeRF captures - PHYDecode verified to match existing lora_phy decoder output	2026-02-05 14:00:17 -07:00
Ryan Malloy	c839d225a8	Initial release: complete LoRa TX/RX for RYLR998 modems GNU Radio Out-of-Tree module providing: - Complete TX chain: PHYEncode → FrameGen → CSSMod - Complete RX chain: CSSDemod → FrameSync → PHYDecode - NETWORKID extraction/encoding (0-255 range) - All SF (7-12) and CR (4/5-4/8) combinations - Loopback tested with 24/24 configurations passing Key features: - Fractional SFD (2.25 downchirp) handling - Gray encode/decode with proper inverse operations - gr-lora_sdr compatible decode modes - GRC block definitions and example flowgraphs - Comprehensive documentation Discovered RYLR998 sync word mapping: sync_bin_1 = (NETWORKID >> 4) * 8 sync_bin_2 = (NETWORKID & 0x0F) * 8	2026-02-05 13:38:07 -07:00

Author

SHA1

Message

Date

Ryan Malloy

3660f139ec

Add channelizer and fix FrameSync for real SDR captures

- Add Channelizer class for wideband capture processing (2 MHz → 125 kHz)
  - FIR low-pass filter with scipy.firwin (or fallback windowed-sinc)
  - Proper decimation for anti-aliasing
- Fix FrameSync preamble detection to accept any CFO
  - Real captures have significant carrier frequency offset
  - Preamble bins appear at arbitrary values, not just near 0
  - Now accepts any strong signal as first preamble, validates consistency
- Add decode_capture.py example script for processing raw BladeRF captures
- PHYDecode verified to match existing lora_phy decoder output

2026-02-05 14:00:17 -07:00

Ryan Malloy

c839d225a8

Initial release: complete LoRa TX/RX for RYLR998 modems

GNU Radio Out-of-Tree module providing:
- Complete TX chain: PHYEncode → FrameGen → CSSMod
- Complete RX chain: CSSDemod → FrameSync → PHYDecode
- NETWORKID extraction/encoding (0-255 range)
- All SF (7-12) and CR (4/5-4/8) combinations
- Loopback tested with 24/24 configurations passing

Key features:
- Fractional SFD (2.25 downchirp) handling
- Gray encode/decode with proper inverse operations
- gr-lora_sdr compatible decode modes
- GRC block definitions and example flowgraphs
- Comprehensive documentation

Discovered RYLR998 sync word mapping:
  sync_bin_1 = (NETWORKID >> 4) * 8
  sync_bin_2 = (NETWORKID & 0x0F) * 8

2026-02-05 13:38:07 -07:00