AHA4709L
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).
 
Features
  • 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
Deliverables
  • Complete documentation
  • Synthesized netlist
  • Netlist or encrypted source for simulation
  • Bit accurate C/Matlab models 
Product Briefs

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