POSSIBILITIES OF TERNARY CONCATENATED CODES WITH TWO- DIMENSIONAL MODULATION
With the integrated use of frequency-efficient modulation and high-speed energy-effective noise-immune coding it is possible to reach Shannon's bound asymptotically. As the examples of these constructions are new ternary concatenated codes with two-dimensional modulation QAM-9 (frequency efficiency 4, 5 bit/sHz) and constructed on their base quinary concatenated codes with two- dimensional modulation QAM-25 (frequency efficiency 5, 3 bit/sHz), studied in this article.