2015•Applied Mechanics and MaterialsRequires access

LDPC Coded 2m-ary QAM for Ultra High Speed Communications

Sawitree Wongroekdee, Kosin Chaiprathum, Virasit Imtawil, Puripong Suthisopapan

Abstract

Modern communication systems that employ LDPC codes and QAM modulation can achieve high speed and reliable transmission without bandwidth expansion. In this paper, the performances of LDPC codes with 2m- ary QAM at m>10, which can provide enormous bandwidth efficiency, are studied. Bit error rate performances of various combinations of LDPC codes and order of QAM are provided. From the results, the performance of LDPC coded ultra-high order QAM is excellent making this system very attractive for ultra-high speed communications.

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Available abstract

Key concepts: Low-density parity-check code, QAM, Quadrature amplitude modulation, Electronic engineering, Bandwidth (computing), Computer science, Bit error rate, Transmission (telecommunications)