Ryan Malloy
c839d225a8
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
74 lines
1.6 KiB
YAML
74 lines
1.6 KiB
YAML
id: rylr998_phy_encode
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label: RYLR998 PHY Encoder
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category: '[RYLR998]/PHY'
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flags: [python, cpp]
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documentation: |-
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LoRa PHY layer encoder.
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Complete transmit chain: CRC → Whiten → Hamming FEC → Interleave → Gray encode
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Encodes payload bytes into CSS symbol bins.
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TX chain order:
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1. Payload bytes → nibbles (low nibble first)
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2. Append CRC (if enabled)
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3. Whiten payload nibbles
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4. Build header (if explicit mode)
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5. Hamming FEC encode
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6. Interleave
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7. Gray encode
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8. Scale for reduced rate (header)
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Input: Raw payload bytes
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Output: Encoded symbol bins (ready for Frame Generator)
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templates:
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imports: from rylr998 import phy_encode
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make: rylr998.phy_encode(sf=${sf}, cr=${cr}, has_crc=${has_crc}, ldro=${ldro}, implicit_header=${implicit_header})
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parameters:
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- id: sf
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label: Spreading Factor
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dtype: int
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default: 9
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options: [7, 8, 9, 10, 11, 12]
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option_labels: ['SF7', 'SF8', 'SF9', 'SF10', 'SF11', 'SF12']
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- id: cr
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label: Coding Rate
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dtype: int
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default: 1
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options: [1, 2, 3, 4]
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option_labels: ['4/5', '4/6', '4/7', '4/8']
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- id: has_crc
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label: CRC Enabled
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dtype: bool
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default: 'True'
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options: ['True', 'False']
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- id: ldro
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label: Low Data Rate Opt
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dtype: bool
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default: 'False'
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options: ['True', 'False']
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- id: implicit_header
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label: Implicit Header
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dtype: bool
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default: 'False'
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options: ['True', 'False']
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inputs:
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- label: payload
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domain: message
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dtype: byte
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outputs:
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- label: symbols
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domain: message
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dtype: int
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file_format: 1
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