Optimization of 16-ary Quadrature Amplitude Modulation Constellations for Phase Noise Impaired Channels

Tuesday, 20 September, 2011
09:00 -- 10:45, Room A
Tu.3.A • DSP Algorithms I
Tu.3.A.6 • 10:15 (Invited)

Optimization of 16-ary Quadrature Amplitude Modulation Constellations for Phase Noise Impaired Channels

Timo Pfau, Xiang Liu, Sethumadhavan Chandrasekhar; Bell Labs, Alcatel-Lucent, USA; Bell Labs, Alcatel-Lucent, USA.
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.


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