Channel Coding Part II - Digital Communication Chapter 6 & 7 - Unik

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Effective code rate Channel Coding Part II Ola Jetlund ◮ Initialize the memory before encoding the first bit (all-zero) ◮ Clear out the memory after encoding the last bit (all-zero) ◮ Hence, a tail of zero-bits is appended to data bits. Introduction Linear Block Codes Hamming Convolutional Codes Example Decoding Decisions Viterbi data tail Encoder codeword ◮ Effective code rate : ◮ L is the number of data bits and k = 1 is assumed: R eff = L n(K + K − 1) < R c
Trellis I Channel Coding Part II Ola Jetlund Trellis diagram is an extension of the state diagram that shows the passage of time. Example of a section of trellis for the rate code State 0/00 1/11 Introduction Linear Block Codes Hamming Convolutional Codes Example Decoding Decisions Viterbi 0/11 1/00 0/10 1/01 0/01 1/10 Time
Page 1 and 2: Channel Coding Part II Ola Jetlund
Page 3 and 4: Linear Block Codes (n, k), I Coding
Page 5 and 6: Convolutional codes Channel Coding
Page 7 and 8: Block Diagram of the DCS Channel Co
Page 9: State Diagram Channel Coding Part I
Page 13 and 14: Trellis III Channel Coding Part II
Page 15 and 16: ML-Decoding Rule Channel Coding Par
Page 17 and 18: Soft and Hard Decisions II Channel
Page 19 and 20: The Viterbi Algorithm - by example
Page 31: The Viterbi Algorithm - by example

Channel Coding Part II - Digital Communication Chapter 6 & 7 - Unik

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