What is meant by convolution coding?
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What is meant by convolution coding?
Convolutional coding is a widely used coding method which is not based on blocks of bits but rather the output code bits are determined by logic operations on the present bit in a stream and a small number of previous bits.
What is the application of convolution code?
The puncturing technique uses standard rate one by two encoders and decoders. The main applications of convolution coding is in the deep space applications and in wireless communication systems.
What is code tree in convolution codes?
Code Tree. Each branch of the tree represents an input symbol, with the corresponding pair of output binary symbols indicated on the branch. It is often convenient to represent the codewords of a convolutional code as paths through a code tree. A convolutional code is sometimes called a (linear) tree code.
Which of the following technique is used for generation of convolutional codes?
Explanation: Viterbi algorithm performs maximum likelihood decoding of convolutional codes. The algorithm was first developed by A.J. Viterbi. It is one of the most important algorithm used for decoding convolutional codes.
What are the advantages of convolutional codes?
Advantages of Convolutional Codes Convolution coding is a popular error-correcting coding method used in digital communications. The convolution operation encodes some redundant information into the transmitted signal, thereby improving the data capacity of the channel.
What is convolution code and how it is different from block code?
In block codes, the data comprises of a block of data of a definite length. However, in convolutional codes, the input data bits are not divided into block but are instead fed as streams of data bits, which convolve to output bits based upon the logic function of the encoder.
What are different representations of convolution codes?
There are several methods for representing a convolutional encoder in graphical form; they include the state transition diagram, the tree diagram, and the trellis diagram. As a convention, in the state transition and trellis diagrams, a solid line represents an input 1, whereas a dashed line represents an input 0.
What is convolution code How is it different from block codes?
How do you decode convolutional codes?
Viterbi algorithm is utilized to decode the convolutional codes. Again the decoding can be done in two approaches. One approach is called hard decision decoding which uses Hamming distance as a metric to perform the decoding operation, whereas, the soft decision decoding uses Euclidean distance as a metric.
What’s the difference between block code and convolution code?
What is a convolutional code describe the various methods used in representing a convolutional encoder?
