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A regional multirnodulus algorithm for blind equalization of QAM signals: Introduction and steady-state analysis
(ELSEVIER SCIENCE BVAMSTERDAM, 2012)
It is well known that constant-modulus-based algorithms present a large mean-square error for high-order quadrature amplitude modulation (QAM) signals, which may damage the switching to decision-directed-based algorithms. ...
QAM-DWT-SVD Based Watermarking Scheme for Medical Images
This paper presents a new semi-blind image watermarking system for medical applications. The new scheme utilizes Singular Value Decomposition (SVD) and Discrete Wavelet Transform (DWT) to embed a textual data into original ...
A linearly-tunable OTA-C sinusoidal oscillator for low-voltage applications
(2002-01-01)
A low-voltage, low-power OTA-C sinusoidal oscillator based on a triode-MOSFET transconductor is here discussed. The classical quadrature model is employed and the transconductor inherent nonlinear characteristic with input ...
A linearly-tunable OTA-C sinusoidal oscillator for low-voltage applications
(2002-01-01)
A low-voltage, low-power OTA-C sinusoidal oscillator based on a triode-MOSFET transconductor is here discussed. The classical quadrature model is employed and the transconductor inherent nonlinear characteristic with input ...
Clipping Distortion Performance of Nonsquare M-QAM OFDM Systems on Nonlinear Time-Variant Channels
(Ieee-inst Electrical Electronics Engineers IncPiscatawayEUA, 2011)
Lattice constellations and codes from quadratic number fields
(2001-05-01)
We propose new classes of linear codes over integer rings of quadratic extensions of Q, the field of rational numbers. The codes are considered with respect to a Mannheim metric, which is a Manhattan metric modulo a ...
Lattice constellations and codes from quadratic number fields
(2001-05-01)
We propose new classes of linear codes over integer rings of quadratic extensions of Q, the field of rational numbers. The codes are considered with respect to a Mannheim metric, which is a Manhattan metric modulo a ...
Low-cost implementation techniques for generic square and cross M-QAM constellations
(Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2016)