Viterbi Decoder

Block Diagram

Solution Type: IP Core

End Market: Broadcast, Military, Test & Measurement, Wireless, Wireline

Evaluation Method: OpenCore Plus

Technology: DSP: Error Detection and Correction

Arria Series: Intel® Arria® 10, Arria® V, Intel® Arria® 10 SoC, Arria® V SoC

Cyclone Series: Cyclone® IV, Cyclone® V, Cyclone® V SoC

Stratix Series: Stratix® IV, Stratix® V


Convolutional codes are widely adopted in wireless communication systems for forward error correction. Creonic offers you an open source Viterbi decoder with AXI4-Stream interface, that is capable of decoding most of the convolutional codes as defined by various standards


  • -design-time configuration of encoder polynomials (different constraint lengths and different code rates).
  • -support for recursive and non-recursive convolutional codes
  • -windowing technique for reduced latency and memory requirements (with acquisition)
  • design-time configuration of quantization, maximum window size, RAM usage (distributed RAM vs. Block RAM)
  • -run-time configuration of block length

Device Utilization and Performance

FPGA: ep4cgx30cf23c6 MAX_WINDOW_LENGTH /BW_LLR_INPUT : 96 / 4 Constraint length / DISTRIBUTED_RAM: 7 / false LE: 4124 FFs: 2012 BRAMs M9K: 8 Frequency (MHz): 192

Getting Started

Please contact the Creonic Sales Team!

IP Quality Metrics

Year IP was first released2012
Latest version of Quartus supported15.1
Altera Customer Use
IP has been successfully implemented in production with at least one customerY

Customer deliverables include the following:

  • Design file (encrypted source code or post-synthesis netlist)
  • Simulation model for ModelSim Altera edition
  • Timing and/or layout constraints
  • Testbench or design example
  • Documentation with revision control
  • Readme file
Any additional customer deliverables provided with IP
Parameterization GUI allowing end user to configure IPN
IP core is enabled for OpenCore Plus SupportY
Source language
Testbench languageVHDL
Software drivers providedN
Driver OS supportn/a
User InterfaceAXI
IP-XACT Metadata includedN
Simulators supportedModelSim, RivieraPRO
Hardware validated N. Altera Board Name NULL
Industry standard compliance testing performed
If No, is it planned?Y
IP has undergone interoperability testing
Interoperability reports available  N

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