Modulation Architecture {2m-QAM}2 over Rings of Integers for TCM
Elvio César Giraudo · Anais do 2002 International Telecommunications Symposium · 2002
Based on the spectral overlapping of two conventional m-QAM modulations, an {m-QAM} 2 modulation technique is performed.This architecture has shown to have better bit error performance than its equivalent M-QAM modulation.The object of this paper is to present a multilevel coding method based on a ring of integer modulo-q over an expanded trellis coded {2m-QAM} 2 modulation, to collect associated gain in terms of E b /N 0 .Performance curves obtained by computer simulation with spectral efficiency for coded and uncoded schemes of 5 and 6 information bit/s/Hz for three codes combination are shown.