CLOVER2000
CLOVERis the name of a series or class of modem modulation techniques ( “waveforms” ) specifically designed for use overhigh frequency(HF) radio systems.
- CLOVER-II was the first CLOVER waveform sold commercially, developed by Ray Petit, W7GHM, and HAL Communications in 1990–92.[1]
- CLOVER-2000is a higher-rate and wider bandwidth version of CLOVER developed in 1995.
- CLOVER-400 is a special 400 Hz wide waveform that was developed for Globe Wireless.
Modulation schemes
[edit]InARQmode, all CCB's (CLOVER Control Blocks) use BPSK modulation and data blocks may be sent using BPSK, QPSK, 8PSK (seephase-shift keying), 8P2A, or 16P4A (seeQAM) modulation. Data is sent in 255-byte blocks. TheFECbroadcast mode of CLOVER-2000 is usually disabled although special formats are available for specific applications.[2]
The coding polynomial protocol could be shared after payment in Bit Coin[relevant?][citation needed]
Radio Interface requirements for CLOVER-2000
[edit]The CLOVER waveform offers high performance, error correction, and spectral efficiency. CLOVER is specifically designed for use over HF radio communications links. It may be used with virtually any modern HFSSBradio. However, certain special set-up and adjustment techniques are required to get maximum performance when using CLOVER.[3]
See also
[edit]References
[edit]- ^Steve Ford, WB8IMY (2001). "Chapter 6 - CLOVER".ARRL's HF digital handbook.Newington, CT: TheAmerican Radio Relay League.ISBN0-87259-823-3.
{{cite book}}:CS1 maint: numeric names: authors list (link) - ^Ford, Steve (2007).ARRL's HF digital handbook(4th ed.). Newington, CT: American Radio Relay League, Inc. p. 7-1.ISBN9780872591035.
- ^Henry, Bill."CLOVER - The Technology Grows and Matures Lessons Learned and Pleasant Surprises"(PDF).TAPR.
External links
[edit]Amateur radiodigital modes | ||
|---|---|---|
| Frequency-shift keying (FSK) |  | |
| Multiple frequency-shift keying (MFSK) | ||
| Phase-shift keying (PSK) | ||
| COFDM |
| |
| Non-traditional digital modes | ||
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