Generic Open Source Viterbi Decoder

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







  • Mobile Communications
  • Digital Video Broadcasting
  • Digital Audio Broadcasting
  • Satellite Modems
  • Satellite Phones
  • Trunked Radio Systems
  • Microwave Links
  • Ultra-wideband (UWB)
  • Wireless Personal Area Networks (WPAN)
  • Wireless Local Area Networks (WLAN)
  • and many more.

Standard Features the Core Supports

  • Design-time configuration of encoder polynomials (different number of states 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
  • Run-time configuration of window length and acquisition length
  • Block-to-block on-the-fly configuration


  Your Benefits


  • Configurable for most standards that apply convolutional codes (GSM, UMTS, CDMA, CDMA2000, WiMAX, WiFi, DAB, DVB, GMR, WiMedia …)
  • Pipelined design for high payload throughputs (about 1 bit per clock cycle).
  • AXI4-Stream interface for simple integration

  •  Up to 250 MHz on AMD Xilinx Virtex-6 FPGA (Speedgrade 1)
  • VHDL source code available under GPL license (hosted at
  • Certified by OpenCores
  • Commercial support and licenses available

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