ABSTRACT
In this chapter, we introduce modulated codes (MC) and some of their properties. We also introduce their coding gain concepts in AWGN and ISI channels compared to the uncoded AWGN channel. We show that an MC does not have any coding gain in an AWGN channel and for any finite tap ISI channel there exists an MC with coding gain compared to the uncoded AWGN channel. The results in this chapter are summarized from [165, 164, 170, 178, 166, 44].
