Optimization of 16-ary Quadrature Amplitude Modulation constellations for phase noise impaired channels
18 September 2011
An iterative constellation optimization algorithm is used to find new 16-ary Quadrature Amplitude Modulation (QAM) constellations. The constellations double phase noise tolerance and improve receiver sensitivity by up to 0.3 dB compared to the square 16-QAM constellation.