Question

Compare cyclc code block code and convolution code

Answer 1

What is the difference between Block Codes and Convolutional Code?

Block codes : In this coding scheme, each k-bit information block is converted to an n-bpit block with (n-k) redundant bits added to k-bit symbols.

These redundant bits are termed as parity bits that carry no information.

The resulting code word is (n,k) block code.

Code rate : k/n

Convolutional codes : In this, code Word depends on k-bit message block and also on ‘m’ previous message blocks.

Encoder has a memory order of ‘m’. As it contains memory, it is implemented with sequential logic circuits.

Improvement to this coding scheme, there are two new coding schemes,

1 .Trellis coding modulation

2.Turbo codes