CLOVER-2000

CLOVER-2500 is faster version of CLOVER-2000 requiring a bandwidth of 2.5 kHz.

CLOVER-2000 is about 25% faster than CLOVER-200. It uses eight tone pulses, each of which is spaced at 312.5-Hz centers, contained within a 2.5 kHz bandwidth. The eight tone pulses are sequential, with only one tone being present at any instant and each tone lasting 1.6 ms. Each frame consists of eight tone pulses lasting a total of 12.8 ms, so the base modulation rate of a CLOVER-2000 signal is always 78.125 symbols per second (regardless of the type of modulation being used). Its ITU emission designation is 2K500H J2 DEN or 2K500H J2 BEN.
CLOVER-2500 has the ability to adapt its data rate (and modulation method) dynamically based on channel conditions. Data blocks may be sent using:

• 2DPSM (2-Channel Diversity Phase Shift Modulation) 132.5 bps
• BPSM (Binary Phase Shift Modulation), 625 bps
• QPSM (Quadrature PSM), 1250 bps
• 8PSM (8-level PSM), 1875 bps
• 8P2A (8PSM + 2-level Amplitude Shift Modulation), 2500 bps
• 16P4A (16 PSM plus 4 ASM), 3750 bps