Performance analysis of optimal even bit triangular Quadrature Amplitude Modulation

The technique of adaptive modulation adjusts constellation points for Quadrature Amplitude Modulation (QAM) depending on channel conditions. Standard modulation schemes are not considered a good candidate for adaptive modulation due to inherent power inefficiency. In this paper, we propose an optimum constellation for transmission of even bits. This technique makes use of triangle quadrature amplitude modulation (TQAMs) to improve transmission efficiency for. Transmission efficiency calculations have been shown in detail. Simulations have also shown an improvement in the SER and BER of the proposed QAM modulation scheme.