Fourth power phase estimation with alternative two-dimensional odd-bit constellations

It is well established that the fourth power phase estimator does not perform well for QAM cross (i.e., odd-bit) constellations. In this paper, new two-dimensional rectangular constellations are presented that give much improved performance, at a reasonably low increase in required constellation ene...

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Bibliographic Details
Published in:IEEE communications letters 2000-06, Vol.4 (6), p.199-201
Main Author: Cartwright, K.V.
Format: Article
Language:English
Subjects:
Amplitude modulation
Applied sciences
Constellation diagram
Constellations
Estimators
Exact sciences and technology
Frequency estimation
Maximum likelihood estimation
Noise levels
Peak to average power ratio
Performance enhancement
Phase estimation
Phase modulation
Power measurement
Quadrature amplitude modulation
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Two dimensional
Variance
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Summary:It is well established that the fourth power phase estimator does not perform well for QAM cross (i.e., odd-bit) constellations. In this paper, new two-dimensional rectangular constellations are presented that give much improved performance, at a reasonably low increase in required constellation energy. For example, the 128B-COB constellation reduces the variance by an order of magnitude, while increasing the constellation's average energy by only 0.28 dB and the peak to average energy ratio by 1.25 dB, relative to 128-QAM.
ISSN:1089-7798
1558-2558
DOI:10.1109/4234.848412