High Data Rate Modulator (HDRM-M)

The Zaltys High Data Rate Modulator (HDRM-M) IP core efficiently realizes the digital baseband section of a high performance modem transmit path. Using sophisticated DSP techniques, the core can generate any modulation scheme up to 8 bits wide, such as (but not restricted to) BSPK, QPSK, 8QAM, 16QAM, 32APSK, 64QAM, 128QAM & 256QAM, all to a high performance level and at high symbol rates.

Functional blocks include:

  • Symbol Mapping
  • Matched Filtering
  • Sample Interpolation
  • DAC Interfacing

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Technical Features
Versatile & high performance digital modulation engine
Multiple constellation orders & shapes from BPSK to 256QAM
Supports offset QPSK (OQPSK)
Continuously variable baud rates
Supports typical rates of 2.5kbaud to 40Mbaud with 100MHz clock
Programmable matched filter
Built-in transmit symbol rate NCO
Highly configurable & versatile
Fully programmable via microprocessor interface
Suitable for FPGA or ASIC
Synchronous with single clock
Proven by multiple customers in multiple applications