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Viterbi decoder

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Viterbi decoder

A decoding algorithm developed in the late 1960s by Andrew Viterbi that is used to decode a particular convolutional code. Viterbi decoders have been the most effective way to decode wireless voice communications in satellite and cellphone transmissions. Viterbi outputs a 0 or a 1 based on its estimate of the input bit. See CDMA, convolutional code and turbo code.

Using the Viterbi Decoder
In the CDMA technology, the Viterbi decoder in the cellphone is used to correct the errors in the convolutional code that was generated by the base station. See CDMA.



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DSP functions used in communications subsystems such a FEC 32-channel Viterbi decoder core can now be implemented in a Spartan-3 FPGA (XC3S1000) for an effective price of $0.
These include blocks for building adaptive filtering applications and a Viterbi decoder for error correction.
6 release provides a total of four new AccelWare cores and an additional ten cores with new micro-architectures, including a Viterbi decoder, a Reed-Solomon decoder, polyphase decimation filters with programmable coefficients, and various micro-architectures, including radix-4 FFT/IFFT and FIR filters.
 
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