Design of LOG-MAP / MAX-LOG-MAP Decoder

Abstract

The process of turbo-code decoding starts with the formation of a posteriori probabilities (APPs) for each data bit, which is followed by choosing the data-bit value that corresponds to the maximum a posteriori (MAP) probability for that data bit. Upon reception of a corrupted code-bit sequence, the process of decision making with APPs allows the MAP algorithm to determine the most likely information bit to have been transmitted at each bit time.

Keywords

• Turbo codes
• Max-Log-Map decoder
• BER
• Eb/N0
• convolutional codes