DominoEX
Domino Series: DominoF -> DominoEX -> THOR
DominoEX, also known as just Domino, is an IFKIncremental Frequency Keying (Incremental Frequency Keying) mode developed by Murray Greenman ZL1BPU and Con Wassilieff ZL2AFP in 2004 that was the first fully developed iteration of the Domino IFKIncremental Frequency Keying family modes Used to send text over RFRadio Frequency. It is the successor to the developmental versions DominoF and DominoG.
IFKIncremental Frequency Keying (Incremental Frequency Keying) is used, where the data is represented not by the frequency of each tone, but by the frequency difference between one tone and the next. An additional technique, called Offset Incremental Keying (IFK+Offset Incremental Frequency Keying) is used to manage the tone sequence in order to counter inter-symbol interference caused by multipath reception. This gives the mode a great improvement in robustness.
DominoEX had optional FECForward Error Correction for all of its available submodes.
MODE | BAUD | BW | TONES | SPEED | FECForward Error Correction | TONE SPACING | |
DominoEX 4 | 3.90625 | 173 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | 18 | ~25 WPM | ~12 WPM | BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate ×2 | |
DominoEX 5 | 5.3833 | 224 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | 18 | ~31 WPM | ~16 WPM | BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate ×2 | |
DominoEX 8 | 7.8125 | 346 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | 18 | ~50 WPM | ~25 WPM | BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate ×2 | |
* | DominoEX 11 | 10.766 | 262 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | 18 | ~70 WPM | ~35 WPM | BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate ×1 |
DominoEX 16 | 15.625 | 355 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | 18 | ~100 WPM | ~50 WPM | BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate ×1 | |
DominoEX 22 | 21.533 | 524 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | 18 | ~140 WPM | ~70 WPM | BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate ×1 | |
Table of DominoEX modes. * Default mode (with FECForward Error Correction off) |
Samples[edit]
All sound samples send the default test message "The quick brown fox jumps over the lazy dog".
DominoEX 4
DominoEX 5
DominoEX 8
DominoEX 11
DominoEX 11 w/with FECForward Error Correction
DominoEX 16
DominoEX 22
Decoding Software[edit]
- Hobby Level Software
Frequencies[edit]
- Amateur Radio Frequencies
- DominoEX Frequencies
- See the ARRL Frequency Allocations page for the US use of 5 MHzMegaHertz (MHz) 10^6 Hz