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About this app
Rattlegram lets you transmit short text messages over COFDMTV encoded audio signals. COFDMTV is based on COFDM (coded orthogonal frequency-division multiplexing) technology:
160 ms long OFDM symbols 6.25 Hz per sub-carrier 1/8 guard interval differentially encoded PSK (phase-shift keying) modulation systematic polar codes for forward error correction Currently Modes 14, 15 and 16 are supported: Using either SPC(2048, 1392), SPC(2048, 1056) or SPC(2048, 712) with CRC32C aided SCL decoding and differential QPSK modulation for the payload. Only a bandwidth of 1600 Hz is needed and the transmission of either 85, 128 or 170 bytes take about one second with the leading noise and fancy header disabled.
What's new
added configurable repeater delay added configurable repeater debouncing internal improvements updated libs and tools
About this version
- Version
- 1.12 (13)
- Size
- 5.29 MB
- Requires Android
- 5.0
- Target SDK
- 21
- Downloads
- 23
- Updated
- Mar 8, 2024
- Package
- com.aicodix.rattlegram
Ratings & reviews
- 50
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- 20
- 10