convolutional code


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convolutional code

[‚kän·vəlü·shən·əl ′kōd]
(communications)
An error-correcting code that processses incoming bits serially rather than in large blocks.

convolutional code

A type of channel coding that adds patterns of redundancy to the data in order to improve the signal-to-noise ratio (SNR) for more accurate decoding at the receiving end. The Viterbi algorithm is used to decode a particular type of convolutional code. See Viterbi decoder.
References in periodicals archive ?
Keywords: convolutional codes, power, register exchange, traceback, viterbi decoder
Since DVBRCS applications involve the transmission of data using various block sizes and coding rates, the coding scheme has to be very flexible, with better performance than the classical concatenation of a convolutional code and a Reed-Solomon code (Douillard et al.
The Viterbi algorithm (VA) is known as a maximum likelihood (ML)-decoding algorithm for convolutional codes.
Hagenauer, Rate-compatible punctured convolutional codes (RCPC codes) and their applications, IEEE Trans.
Coded modulation outperforms conventional modulations because the set partition and convolutional code are chosen in such a way as to increase the distance between channel sequences while maintaining the same average transmission power.
One of the most popular MAP decoders used for decoding convolutional code is BCJR decoder.
Instead of using a punctured convolutional code as inner code, this scheme uses PTCM.
The Viterbi computational technique was first time used in 1967 as a technique for decoding convolutional codes [7].
16 protocols exploit the Viterbi algorithm to decode the convolutional code.
In the paper [8] it is shown that for transmission of short blocks (under 150 bits) the tailbiting convolutional codes provide a better error performance than the turbo-codes.
In this section the employment of convolutional code in adaptive modulation system will be investigated.
free] is the free distance of the convolutional code, [c.