CLOVER 2000

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CLOVER-I | CLOVER-II | CLOVER 2000 | CLOVER 2500
CLOVER 2000
CLOVER-2000new.jpg
Frequencies 3 MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30MHz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
- 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation PSKPhase-Shift Keying,QAMQuadrature Amplitude Modulation
ACFAutoCorrelation Function
Bandwidth 2 kHzKiloHertz (kHz) 10^3 Hz2,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.002 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.002 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.002 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description CLOVER 2000 is an upgrade to CLOVER-II, a digital data protocol developed by Ray Petit and HAL Communications. Sometimes referred to as XCLOVER or 8 Tone CLOVER.
I/Q Raw Recording
Audio Sample
CLOVER 2000 is an upgrade to CLOVER-II, a digital data protocol developed by Ray Petit and HAL Communications. Sometimes referred to as XCLOVER or 8 Tone CLOVER. CLOVER-2000 was introduced in 1999 by HAL Communications. CLOVER 2000 is 4 times as fast as CLOVER-II, and carries over all of the error correction algorithms from the original CLOVER-II.

CLOVER-2000 uses 8 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). wide tone-pulse subcarriers that are each offset from the base tone by 2ms, so that every 16ms all eight tone pulses transmit their cycle. CLOVER-2000 uses Phase (PSKPhase-Shift Keying) or Phase-Amplitude (Circular QAMQuadrature Amplitude Modulation) shift keying modulation. CLOVER-2000 occupies 2 kHzKiloHertz (kHz) 10^3 Hz of bandwidth in contrast to CLOVER-II's 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). of bandwidth. The symbol rate for CLOVER-2000 is always 62.5 bdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. for all modes, double the symbol rate of CLOVER-II.


Mode Description Data Rate ARQAutomatic Repeat reQuestAutomatic Repeat Query/FECForward Error Correction Support
16P4A 16-Phase 4-Amplitude Modulation (64-QAMQuadrature Amplitude Modulation) 3000 bpsBits per second (bps) Max ARQAutomatic Repeat reQuestAutomatic Repeat Query & FECForward Error Correction
8P2A 8-Phase 2-Amplitude Modulation (16-QAMQuadrature Amplitude Modulation) 2000 bpsBits per second (bps) Max ARQAutomatic Repeat reQuestAutomatic Repeat Query & FECForward Error Correction
8PSM 8 Phase Shift-Keying Modulation (8-PSK8-Phase Phase-Shift Keying (3 bits per symbol)) 1500 bpsBits per second (bps) Max ARQAutomatic Repeat reQuestAutomatic Repeat Query & FECForward Error Correction
QPSM Quadrature Phase-Shift Keying (QPSKQuadrature Phase-Shift Keying (2 bits per symbol)) 1000 bpsBits per second (bps) Max ARQAutomatic Repeat reQuestAutomatic Repeat Query & FECForward Error Correction
BPSM BPSKBinary Phase-Shift Keying (1 bit per symbol) Binary Phase-Shift Keying (QPSKQuadrature Phase-Shift Keying (2 bits per symbol)) 500 bpsBits per second (bps) Max ARQAutomatic Repeat reQuestAutomatic Repeat Query & FECForward Error Correction
4DPSM BPSKBinary Phase-Shift Keying (1 bit per symbol) with 4-Channel Redundancy 250 bpsBits per second (bps) Max FECForward Error Correction

Samples[edit]

Calling Mode BPSM QPSM
Clover-2000 Calling Mode.jpg
CLOVER-2000 BPSK.jpg
CLOVER-2000 QPSK.jpg

8PSM 8P2A 16P4A
CLOVER-2000 8PSM.jpg
CLOVER-2000 8P2A.jpg
CLOVER-2000 16P4A.jpg

Additional Samples[edit]

Decoding Software[edit]

Professional Equipment/Software

Additional Links[edit]

Additional Images[edit]