Digital Communications: Fundamentals and Applications, 3rd Edition

Chapter 8

Channel Coding: Part 3: Turbo Codes and Low-Density Parity Check (LDPC) Codes

The block diagram of a digital communication system is illustrated. The information source is given to the format block. Then the message symbols and digital input, m subscript i, are given to the source encode block. Then the digital input moves through encrypt and channel encode blocks. After the channel encode block, channel symbols are given to the multiplex, which receives input from other sources. The first output from the multiplex block is given to the OFDM or SC-OFDM modulate block. The OFDM vector symbols from the OFDM or SC-OFDM modulate are given ...