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This paper presents the mathematical model for symbol error probability of triangular quadrature amplitude modulation in a single-input multi-output environment. The symbol error probability performance is evaluated over fading channels namely Rayleigh, Nakagami-m, Nakagami-n, and Nakagami-q. The maximal-ratio combining technique is considered as spatial diversity algorithm and unified moment-generating-function-based...
We study the performance of a parametric quadrature amplitude modulation (QAM) family, called thetas-QAM, which includes other known constellations, such as square QAM (SQAM) and triangular QAM (TQAM), as special cases. The versatile structure of the thetas-QAM signal constellation, which occurs from the varying angle between the signal points, results in achieving the minimum symbol error rate (SER)...
The triangular quadrature amplitude modulation (TQAM) is a newly designed signal set which has a power gain over the widely used square quadrature amplitude modulation (SQAM) and maintains low detection complexity. In this paper, we propose an optimum bit mapping for the TQAM minimizing bit errors. We also suggest a lower bound of Gray coding penalty which can be used as a measure of suboptimum bit...
It is well known that the square quadrature amplitude modulation (QAM) has been widely used as a modulation technique for digital communication systems due to its simple detection in spite that the power efficiency of the square QAM is not optimum. The newly proposed 16-ary triangular QAM provides considerable power gain while keeping low detection complexity. In this paper, we propose two 64-ary...
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