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 ?
Adaptive Modulation for OFDM System by Using Convolutional Coding and BCH Coding.
d) From 60 until 124 Resolution of cyclic shift ([delta]) 4 Coding scheme Convolutional coding Interleaver Matrix: 16 x 8 Decoding scheme Soft decision Viterbi Constraint length 7 Coding rate 1/2 Polynomial generator [171 133] Number of branches 3 Channel Uniform (6 paths) Knee factor power amplifier (p) 3 Input backoff (IBO) 0, 2, 4 dB
As such, convolutional coding contains memory and has to be implemented using sequential logic.
A dependence of a BER on free space path loss for different noise temperatures without coding and with convolutional coding is shown in Fig.
Convolutional coding essentially reduces error probability that leads to a BER vanishing for antennas with a diameter of more than 1.
Both protocols exploit convolutional coding as the code scheme, which has a constraint of 7 and a code rate of 1/2.
Internal encoder uses convolutional coding and is a complement to the Reed-Solomon coder and the external interleaver.
However, additional BPSK is required when using Reed-Solomon convolutional coding (RS-CC).
A convolutional coding is done by combining the fixed number of inputs bits.
In the channel coding module, the Reed-Solomon (RS) and convolutional coding techniques have been included as representative coding methods from the algebraic and statistical coding fields respectively.
A single tail byte is added and the bits are ready for Reed-Solomon and Convolutional Coding.
Further details on convolutional coding can be found in [5]