CLOVER 2000 - Signal Identification Wiki (original) (raw)

CLOVER-I | CLOVER-II | CLOVER 2000 | CLOVER 2500

CLOVER 2000


Frequencies	3 MHz,30 MHz
Frequency Range	3 MHz - 30 MHz
Mode	USB
Modulation	PSK,QAM
ACF	—
Emission Designator	—
Bandwidth	2 kHz
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