VA08V

The VA08V is a low complexity 16, 32, 64 or 256 state error control decoder using the maximum likelihood Viterbi algorithm. The decoder is designed for maximum flexibility, allowing it to decode various communications standards, as well as custom coding solutions.

Features

• 16, 32, 64 or 256 states (constraint lengths 5, 6, 7 or 9) Viterbi decoder
• Up to 238 MHz internal clock
• Up to 23.8 Mbit/s for 16, 32, or 64 states or 7.0 Mbit/s with 256 states
• Rate 1/2, 1/3, or 1/4 (inputs can be punctured for higher rates)
• Optional or standard code polynomials
• 6–bit received signed magnitude data
• Optional block decoding with or without tail
• Estimated channel bit error outputs
• Optional serial or parallel data input
• Optional automatic synchronisation for rate 1/2 QPSK and rate 1/2 to 1/4 BPSK
• 827, 873, 950 and 549 slices for Virtex-II Pro, Spartan-3, Virtex-4 and Virtex-5, respectively. 1 or 2 BlockRAMs.
• Asynchronous logic free design
• Free simulation software
• Available as EDIF core and VHDL simulation core for Xilinx Virtex-II Pro, Spartan-3, Virtex-4 and Virtex-5 FPGAs under SignOnce IP License. Actel and Lattice FPGA cores available on request.
• Available as VHDL core for ASICs
• Low cost university license also available
• Data Sheet 4 Sep 2000 (v1.25)

Last update 4 Sep 2008. Home