DVB-S2-X Compliant LLR Demapper Core 
The AHA4709L LLR Demapper core is compliant with section 5.4* (see Note 1) of the Digital Video Broadcast S2-Extention (DVB-S2-X) standard. By default, this core uses re-labeled constellation points to implement the re-ordering of interleaved columns in section 5.3.3 of the DVB-S2-X standard as required by the AHA4709D Decoder core. The core takes in digital I/Q symbol data and outputs soft metric symbol values or LLRs at a resolution depth of 6 bits per LLR value. The core allows code and modulation changes on a block-by-block basis to fully support both Adaptive Coding Modulation (ACM) and Variable Coding Modulation (VCM).
  • DVB-S2-X compliant
  • ACM and VCM compliant
  • Supports all original DVB-S2 MODCODs plus all additional DVB-S2-X MODCODs
  • Supports VL-SNR codes 
  • 16K, 32K and 64K block sizes
  • 1 to 8 bits / symbol
  • Max Input rate: 1 symbol / clock
  • Max Output rate: 1 symbol / clock
  • Typical Speed in Stratix V:  300 MHz
  • Typical Resource Usage in Stratix V:  4.6K ALMs, 11 M20K RAM
  • Complete documentation
  • Synthesized netlist
  • Netlist or encrypted source for simulation
  • Bit accurate C/Matlab models 
Product Briefs


Data Compression

Forward Error Correction

Encryption and Hashing

Regular Expression Search

Recent News
Comtech EF Data Announces New Durostream WAN Optimization Appliances with Packet Protection
Posted on Monday, August 27, 2018
Comtech EF Data Corp. & Kepler Communications Announce Collaboration to Advance Rapidly Deployable Satellite Communications
Posted on Tuesday, June 5, 2018
Contact Us