How to interpolate in arithmetic transform algorithms. - Renato J. Cintra; Hélio M. de Oliveira (ICASSP, 2002)

Elliptic-cylindrical wavelets: the Mathieu wavelets. - M. M. S. Lira; Hélio Magalhães de Oliveira; Renato J. Cintra (IEEE Signal Process. Lett., 2004)

Robust image watermarking using non-regular wavelets. - Renato J. Cintra; Todor V. Cooklev (Signal Image Video Process., 2009)

Fragile watermarking using finite field trigonometrical transforms. - Renato J. Cintra; Vassil S. Dimitrov; Hélio M. de Oliveira; Ricardo M. Campello de Souza (Signal Process. Image Commun., 2009)

Contrast in speckled imagery with stochastic distances. - Alejandro César Frery; Abraao D. C. Nascimento; Renato J. Cintra (ICIP, 2010)

Hypothesis Testing in Speckled Data With Stochastic Distances. - Abraao D. C. Nascimento; Renato J. Cintra; Alejandro César Frery (IEEE Trans. Geosci. Remote. Sens., 2010)

The arithmetic cosine transform: exact and approximate algorithms. - Renato J. Cintra; Vassil S. Dimitrov (IEEE Trans. Signal Process., 2010)

A new algorithm for double scalar multiplication over Koblitz curves. - Jithra Adikari; Vassil S. Dimitrov; Renato J. Cintra (ISCAS, 2011)

Algebraic integer based 8×8 2-D DCT architecture for digital video processing. - Arjuna Madanayake; Renato J. Cintra; Denis Onen; Vassil S. Dimitrov; Leonard T. Bruton (ISCAS, 2011)

An Integer Approximation Method for Discrete Sinusoidal Transforms. - Renato J. Cintra (Circuits Syst. Signal Process., 2011)

A DCT Approximation for Image Compression. - Renato J. Cintra; Fábio M. Bayer (IEEE Signal Process. Lett., 2011)

A Generalized Prefix Construction for OFDM Systems Over Quasi-Static Channels. - Todor V. Cooklev; Hakan Dogan; Renato J. Cintra; Hakan Yildiz (IEEE Trans. Veh. Technol., 2011)

Error-free VLSI architecture for the 2-D Daubechies 4-tap filter using algebraic integers. - Shiva Madishetty; Arjuna Madanayake; Renato J. Cintra; Dale H. Mugler; Vassil S. Dimitrov (ISCAS, 2012)

Block-Parallel Systolic-Array Architecture for 2-d NTT-Based Fragile Watermark Embedding. - Arjuna Madanayake; Renato J. Cintra; Vassil S. Dimitrov; Leonard T. Bruton (Parallel Process. Lett., 2012)

A Row-Parallel 8 × 8 2-D DCT Architecture Using Algebraic Integer-Based Exact Computation. - Arjuna Madanayake; Renato J. Cintra; Denis Onen; Vassil S. Dimitrov; Nilanka T. Rajapaksha; Leonard T. Bruton; Amila Edirisuriya (IEEE Trans. Circuits Syst. Video Technol., 2012)

Asynchronous Realization of Algebraic Integer-Based 2D DCT Using Achronix Speedster SPD60 FPGA. - Nilanka T. Rajapaksha; Amila Edirisuriya; Arjuna Madanayake; Renato J. Cintra; Denis Onen; Ihab Amer; Vassil S. Dimitrov (J. Electr. Comput. Eng., 2013)

Parametric and nonparametric tests for speckled imagery. - Renato J. Cintra; Alejandro César Frery; Abraão David Costa do Nascimento (Pattern Anal. Appl., 2013)

VLSI Architectures for the 4-Tap and 6-Tap 2-D Daubechies Wavelet Filters Using Algebraic Integers. - Shiva Kumar Madishetty; Arjuna Madanayake; Renato J. Cintra; Vassil S. Dimitrov; Dale H. Mugler (IEEE Trans. Circuits Syst. I Regul. Pap., 2013)

A Single-Channel Architecture for Algebraic Integer-Based 8 × 8 2-D DCT Computation. - Amila Edirisuriya; Arjuna Madanayake; Renato J. Cintra; Vassil S. Dimitrov; Nilanka T. Rajapaksha (IEEE Trans. Circuits Syst. Video Technol., 2013)

Entropy-Based Statistical Analysis of PolSAR Data. - Alejandro César Frery; Renato J. Cintra; Abraao D. C. Nascimento (IEEE Trans. Geosci. Remote. Sens., 2013)

Multiplierless Approximate 4-point DCT VLSI Architectures for Transform Block Coding. - Fábio M. Bayer; Renato J. Cintra; Arjuna Madanayake; Uma Sadhvi Potluri (CoRR, 2014)

DCT-like Transform for Image and Video Compression Requires 10 Additions Only. - Renato J. Cintra; Fábio M. Bayer; Vítor de A. Coutinho; Sunera Kulasekera; Arjuna Madanayake (CoRR, 2014)

Algebraic integer architecture with minimum adder count for the 2-D Daubechies 4-tap filters banks. - Shiva Kumar Madishetty; Arjuna Madanayake; Renato J. Cintra; Vassil S. Dimitrov; Dale H. Mugler (Multidimens. Syst. Signal Process., 2014)

Low-complexity 8-point DCT approximations based on integer functions. - Renato J. Cintra; Fábio M. Bayer; C. J. Tablada (Signal Process., 2014)

Comparing Edge Detection Methods Based on Stochastic Entropies and Distances for PolSAR Imagery. - Abraão David Costa do Nascimento; Michelle Matos Horta; Alejandro C. Frery; Renato J. Cintra (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2014)

Precise VLSI Architecture for AI Based 1-D/ 2-D Daub-6 Wavelet Filter Banks With Low Adder-Count. - Shiva Kumar Madishetty; Arjuna Madanayake; Renato J. Cintra; Vassil S. Dimitrov (IEEE Trans. Circuits Syst. I Regul. Pap., 2014)

Improved 8-Point Approximate DCT for Image and Video Compression Requiring Only 14 Additions. - Uma Sadhvi Potluri; Arjuna Madanayake; Renato J. Cintra; Fábio M. Bayer; Sunera Kulasekera; Amila Edirisuriya (IEEE Trans. Circuits Syst. I Regul. Pap., 2014)

Analytic Expressions for Stochastic Distances Between Relaxed Complex Wishart Distributions. - Alejandro César Frery; Abraao D. C. Nascimento; Renato J. Cintra (IEEE Trans. Geosci. Remote. Sens., 2014)

Bias Correction and Modified Profile Likelihood Under the Wishart Complex Distribution. - Abraao D. C. Nascimento; Alejandro César Frery; Renato J. Cintra (IEEE Trans. Geosci. Remote. Sens., 2014)

Low-complexity pruned 8-point DCT approximations for image encoding. - Vítor de A. Coutinho; Renato J. Cintra; Fábio M. Bayer; Sunera Kulasekera; Arjuna Madanayake (CONIELECOMP, 2015)

Multi-beam 4 GHz Microwave Apertures Using Current-Mode DFT Approximation on 65 nm CMOS. - Viduneth Ariyarathna; Sunera Kulasekera; Arjuna Madanayake; Dora Suarez; Renato J. Cintra; Fábio M. Bayer; Leonid Belostotski (CoRR, 2015)

A Short Survey on Arithmetic Transforms and the Arithmetic Hartley Transform. - Renato J. Cintra; Hélio M. de Oliveira (CoRR, 2015)

Wavelets for Elliptical Waveguide Problems. - M. M. S. Lira; Hélio M. de Oliveira; Renato J. Cintra; Ricardo M. Campello de Souza (CoRR, 2015)

A Factorization Scheme for Some Discrete Hartley Transform Matrices. - Hélio M. de Oliveira; Renato J. Cintra; Ricardo M. Campello de Souza (CoRR, 2015)

Multilayer Hadamard Decomposition of Discrete Hartley Transforms. - Hélio M. de Oliveira; Renato J. Cintra; Ricardo M. Campello de Souza (CoRR, 2015)

Fast Finite Field Hartley Transforms Based on Hadamard Decomposition. - Hélio M. de Oliveira; R. G. F. Távora; Renato J. Cintra; Ricardo M. Campello de Souza (CoRR, 2015)

An Extension of the Dirichlet Density for Sets of Gaussian Integers. - Leandro Chaves Rêgo; Renato J. Cintra (CoRR, 2015)

Multi-Beam RF Aperture Using Multiplierless FFT Approximation. - Dora Suarez; Renato J. Cintra; Fábio M. Bayer; Arindam Sengupta; Sunera Kulasekera; Arjuna Madanayake (CoRR, 2015)

Fast computation of residual complexity image similarity metric using low-complexity transforms. - Yves Pauchard; Renato J. Cintra; Arjuna Madanayake; Fábio M. Bayer (IET Image Process., 2015)

A class of DCT approximations based on the Feig-Winograd algorithm. - C. J. Tablada; Fábio M. Bayer; Renato J. Cintra (Signal Process., 2015)

VLSI architecture for 4-D depth filtering. - Arjuna Madanayake; Randeel Wimalagunarathne; Donald G. Dansereau; Renato J. Cintra; Len T. Bruton (Signal Image Video Process., 2015)

A Discrete Tchebichef Transform Approximation for Image and Video Coding. - Paulo A. M. Oliveira; Renato J. Cintra; Fábio M. Bayer; Sunera Kulasekera; Arjuna Madanayake (IEEE Signal Process. Lett., 2015)

VLSI Computational Architectures for the Arithmetic Cosine Transform. - Nilanka T. Rajapaksha; Arjuna Madanayake; Renato J. Cintra; Jithra Adikari; Vassil S. Dimitrov (IEEE Trans. Computers, 2015)

Energy-efficient 8-point DCT Approximations: Theory and Hardware Architectures. - Renato J. Cintra; Fábio M. Bayer; Vítor de A. Coutinho; Sunera Kulasekera; Arjuna Madanayake (CoRR, 2016)

A New Information Theoretical Concept: Information-Weighted Heavy-tailed Distributions. - Hélio M. de Oliveira; Renato J. Cintra (CoRR, 2016)

Energy-Efficient 8-Point DCT Approximations: Theory and Hardware Architectures. - Renato J. Cintra; Fábio M. Bayer; Vítor de A. Coutinho; Sunera Kulasekera; Arjuna Madanayake; André Leite (Circuits Syst. Signal Process., 2016)

Error-free computation of 8-point discrete cosine transform based on the Loeffler factorisation and algebraic integers. - Diego F. G. Coelho; Renato J. Cintra; Sunera Kulasekera; Arjuna Madanayake; Vassil S. Dimitrov (IET Signal Process., 2016)

A multiplierless pruned DCT-like transformation for image and video compression that requires ten additions only. - Vítor de A. Coutinho; Renato J. Cintra; Fábio M. Bayer; Sunera Kulasekera; Arjuna Madanayake (J. Real Time Image Process., 2016)

An orthogonal 16-point approximate DCT for image and video compression. - Thiago L. T. da Silveira; Fábio M. Bayer; Renato J. Cintra; Sunera Kulasekera; Arjuna Madanayake; Alice J. Kozakevicius (Multidimens. Syst. Signal Process., 2016)

A Parallel Method for the Computation of Matrix Exponential Based on Truncated Neumann Series. - Vassil S. Dimitrov; Viduneth Ariyarathna; Diego F. G. Coelho; Logan Rakai; Arjuna Madanayake; Renato J. Cintra (ARITH, 2017)

Design of a low-complexity wideband analog true-time-delay 5-beam array in 65nm CMOS. - Arjuna Madanayake; Viduneth Ariyarathna; Nilan Udayanga; Leonid Belostotski; Sirani M. Perera; Renato J. Cintra (MWSCAS, 2017)

DCT-like Transform for Image Compression Requires 14 Additions Only. - Fábio M. Bayer; Renato J. Cintra (CoRR, 2017)

A Digital Hardware Fast Algorithm and FPGA-based Prototype for a Novel 16-point Approximate DCT for Image Compression Applications. - Fábio M. Bayer; Renato J. Cintra; Amila Edirisuriya; Arjuna Madanayake (CoRR, 2017)

Multiuser Communication Based on the DFT Eigenstructure. - Ricardo M. Campello de Souza; Hélio M. de Oliveira; Renato J. Cintra (CoRR, 2017)

A Single-Channel Architecture for Algebraic Integer Based 8×8 2-D DCT Computation. - Amila Edirisuriya; Arjuna Madanayake; Renato J. Cintra; Vassil S. Dimitrov (CoRR, 2017)

Comments on 'Area and power efficient DCT architecture for image compression' by Dhandapani and Ramachandran. - Renato J. Cintra; Fábio M. Bayer (EURASIP J. Adv. Signal Process., 2017)

Fast Algorithms and Architectures for 8-Point DST-II/DST-VII Approximations. - Renato J. Cintra; Fábio M. Bayer; Arjuna Madanayake; Uma Sadhvi Potluri; Amila Edirisuriya (J. Circuits Syst. Comput., 2017)

Multiplierless 16-point DCT approximation for low-complexity image and video coding. - Thiago Lopes Trugillo da Silveira; Raíza S. Oliveira; Fábio M. Bayer; Renato J. Cintra; Arjuna Madanayake (Signal Image Video Process., 2017)

DCT approximations based on Chen's factorization. - C. J. Tablada; Thiago Lopes Trugillo da Silveira; Renato J. Cintra; Fábio M. Bayer (Signal Process. Image Commun., 2017)

DFT Computation Using Gauss-Eisenstein Basis: FFT Algorithms and VLSI Architectures. - Diego F. G. Coelho; Renato J. Cintra; Nilanka T. Rajapaksha; Gihan J. Mendis; Arjuna Madanayake; Vassil S. Dimitrov (IEEE Trans. Computers, 2017)

Low-Complexity Image and Video Coding Based on an Approximate Discrete Tchebichef Transform. - Paulo A. M. Oliveira; Renato J. Cintra; Fábio M. Bayer; Sunera Kulasekera; Arjuna Madanayake (IEEE Trans. Circuits Syst. Video Technol., 2017)

Low-Complexity Multidimensional DCT Approximations for High-Order Tensor Data Decorrelation. - Vítor de A. Coutinho; Renato J. Cintra; Fábio M. Bayer (IEEE Trans. Image Process., 2017)

An Offset-Canceling Approximate-DFT Beamforming Architecture for Wireless Transceivers. - Haixiang Zhao; Soumyajit Mandal; Viduneth Ariyarathna; Arjuna Madanayake; Renato J. Cintra (ISCAS, 2018)

Pruned Discrete Tchebichef Transform Approximation for Image Compression. - Vítor de A. Coutinho; Renato J. Cintra; Fábio M. Bayer; Paulo A. M. Oliveira; Raíza S. Oliveira; Arjuna Madanayake (Circuits Syst. Signal Process., 2018)

Analog Approximate-FFT 8/16-Beam Algorithms, Architectures and CMOS Circuits for 5G Beamforming MIMO Transceivers. - Viduneth Ariyarathna; Arjuna Madanayake; Xinyao Tang; Diego F. G. Coelho; Renato J. Cintra; Leonid Belostotski; Soumyajit Mandal; Theodore S. Rappaport (IEEE J. Emerg. Sel. Topics Circuits Syst., 2018)

Fast matrix inversion and determinant computation for Polarimetric Synthetic Aperture Radar. - Diego F. G. Coelho; Renato J. Cintra; Alejandro César Frery; Vassil S. Dimitrov (Comput. Geosci., 2018)

Wideband N-Beam Arrays Using Low-Complexity Algorithms and Mixed-Signal Integrated Circuits. - Sirani M. Perera; Viduneth Ariyarathna; Nilan Udayanga; Arjuna Madanayake; Ge Wu; Leonid Belostotski; Yingying Wang 007; Soumyajit Mandal; Renato J. Cintra; Theodore S. Rappaport (IEEE J. Sel. Top. Signal Process., 2018)

Computation of 2D 8×8 DCT Based on the Loeffler Factorization Using Algebraic Integer Encoding. - Diego F. G. Coelho; Sushmabhargavi Nimmalapalli; Vassil S. Dimitrov; Arjuna Madanayake; Renato J. Cintra; Arnaud Tisserand (IEEE Trans. Computers, 2018)

Low-Complexity Approximate Convolutional Neural Networks. - Renato J. Cintra; Stefan Duffner; Christophe Garcia; André Leite (IEEE Trans. Neural Networks Learn. Syst., 2018)

Efficient Computation of the 8-point DCT via Summation by Parts. - Diego F. G. Coelho; Renato J. Cintra; Vassil S. Dimitrov (J. Signal Process. Syst., 2018)

The gamma generalized normal distribution: A descriptor of SAR imagery. - Gauss M. Cordeiro; Renato J. Cintra; Leandro Chaves Rêgo; Abraão David Costa do Nascimento (J. Comput. Appl. Math., 2019)

Rayleigh Regression Model for Ground Type Detection in SAR Imagery. - Bruna Gregory Palm; Fábio M. Bayer; Renato J. Cintra; Mats I. Pettersson; Renato B. Machado (IEEE Geosci. Remote. Sens. Lett., 2019)

Low-complexity 8-point DCT approximation based on angle similarity for image and video coding. - Raíza S. Oliveira; Renato J. Cintra; Fábio M. Bayer; Thiago L. T. da Silveira; Arjuna Madanayake; André Leite (Multidimens. Syst. Signal Process., 2019)

An iterative wavelet threshold for signal denoising. - Fábio M. Bayer; Alice J. Kozakevicius; Renato J. Cintra (Signal Process., 2019)

Detecting Changes in Fully Polarimetric SAR Imagery With Statistical Information Theory. - Abraao D. C. Nascimento; Alejandro C. Frery; Renato J. Cintra (IEEE Trans. Geosci. Remote. Sens., 2019)

Low-Complexity Real-Time Light Field Compression using 4-D Approximate DCT. - Namalka Liyanage; Chamith Wijenayake; Chamira U. S. Edussooriya; Arjuna Madanayake; Renato J. Cintra; Eliathamby Ambikairajah (ISCAS, 2020)

Fast Radix-32 Approximate DFTs for 1024-Beam Digital RF Beamforming. - Arjuna Madanayake; Renato J. Cintra; Najath Akram; Viduneth Ariyarathna; Soumyajit Mandal; Vítor de A. Coutinho; Fábio M. Bayer; Diego F. G. Coelho; Theodore S. Rappaport (IEEE Access, 2020)

Radix-2 Self-Recursive Sparse Factorizations of Delay Vandermonde Matrices for Wideband Multi-Beam Antenna Arrays. - Sirani M. Perera; Arjuna Madanayake; Renato J. Cintra (IEEE Access, 2020)

Multidimensional Wavelets for Scalable Image Decomposition: Orbital Wavelets. - Hélio M. de Oliveira; Victor Vermehren Valenzuela; Renato J. Cintra (CoRR, 2020)

Rounded Hartley Transform: A Quasi-involution. - Renato J. Cintra; Hélio M. de Oliveira; C. O. Cintra (CoRR, 2020)

Low-complexity Architecture for AR(1) Inference. - A. Borges Jr.; Renato J. Cintra; Diego F. G. Coelho; Vassil S. Dimitrov (CoRR, 2020)

Multi-dimensional wavelets for scalable image decomposition: Orbital wavelets. - Hélio M. de Oliveira; Victor Vermehren Valenzuela; Renato J. Cintra (Int. J. Wavelets Multiresolution Inf. Process., 2020)

The compound truncated Poisson Cauchy model: A descriptor for multimodal data. - Josimar M. Vasconcelos; Renato J. Cintra; Abraão David Costa do Nascimento; Leandro Chaves Rêgo (J. Comput. Appl. Math., 2020)

Wavelength-Resolution SAR Ground Scene Prediction Based on Image Stack. - Bruna Gregory Palm; Dimas Irion Alves; Mats I. Pettersson; Viet Thuy Vu; Renato B. Machado; Renato J. Cintra; Fábio M. Bayer; Patrik B. G. Dammert; Hans Hellsten (Sensors, 2020)

A Multiparametric Class of Low-complexity Transforms for Image and Video Coding. - Diego Ramos Canterle; Thiago L. T. da Silveira; Fábio M. Bayer; Renato J. Cintra (Signal Process., 2020)

A Low-SWaP 16-Beam 2.4 GHz Digital Phased Array Receiver Using DFT Approximation. - Vítor de A. Coutinho; Viduneth Ariyarathna; Diego F. G. Coelho; Sravan Kumar Pulipati; Renato J. Cintra; Arjuna Madanayake; Fábio M. Bayer; Vassil S. Dimitrov (IEEE Trans. Aerosp. Electron. Syst., 2020)

Low-complexity three-dimensional discrete Hartley transform approximations for medical image compression. - Vítor de A. Coutinho; Renato J. Cintra; Fábio M. Bayer (Comput. Biol. Medicine, 2021)

Geometrical Representation for Number-theoretic Transforms. - Hélio M. de Oliveira; Renato J. Cintra (CoRR, 2021)

Low-complexity Scaling Methods for DCT-II Approximations. - Diego F. G. Coelho; Renato J. Cintra; Arjuna Madanayake; Sirani M. Perera (CoRR, 2021)

Signal detection and inference based on the beta binomial autoregressive moving average model. - Bruna Gregory Palm; Fábio M. Bayer; Renato J. Cintra (Digit. Signal Process., 2021)

Low-Complexity Scaling Methodsfor DCT-II Approximations. - Diego F. G. Coelho; Renato J. Cintra; Arjuna Madanayake; Sirani M. Perera (IEEE Trans. Signal Process., 2021)

Efficient and Self-Recursive Delay Vandermonde Algorithm for Multi-Beam Antenna Arrays. - Sirani M. Perera; Arjuna Madanayake; Renato J. Cintra (CoRR, 2022)

Autoregressive Model for Multi-Pass SAR Change Detection Based on Image Stacks. - Bruna Gregory Palm; Dimas Irion Alves; Viet Thuy Vu; Mats I. Pettersson; Fábio M. Bayer; Renato J. Cintra; Renato B. Machado; Patrik B. G. Dammert; Hans Hellsten (CoRR, 2022)

Towards a Low-SWaP 1024-beam Digital Array: A 32-beam Sub-system at 5.8 GHz. - Arjuna Madanayake; Viduneth Ariyarathna; Suresh Madishetty; Sravan Kumar Pulipati; Renato J. Cintra; Diego F. G. Coelho; Raíza Oliveira; Fábio M. Bayer; Leonid Belostotski; Soumyajit Mandal; Theodore S. Rappaport (CoRR, 2022)

Low-Complexity Loeffler DCT Approximations for Image and Video Coding. - Diego F. G. Coelho; Renato J. Cintra; Fábio M. Bayer; Sunera Kulasekera; Arjuna Madanayake; P. A. C. Martinez; Thiago L. T. da Silveira; Raíza S. Oliveira; Vassil S. Dimitrov (CoRR, 2022)

2-D Rayleigh autoregressive moving average model for SAR image modeling. - Bruna Gregory Palm; Fábio M. Bayer; Renato J. Cintra (Comput. Stat. Data Anal., 2022)

Low-complexity rounded KLT approximation for image compression. - Anabeth P. Radünz; Fábio M. Bayer; Renato J. Cintra (J. Real Time Image Process., 2022)

Improved Point Estimation for the Rayleigh Regression Model. - Bruna Gregory Palm; Fábio M. Bayer; Renato J. Cintra (IEEE Geosci. Remote. Sens. Lett., 2022)

Data-independent low-complexity KLT approximations for image and video coding. - Anabeth P. Radünz; Thiago L. T. da Silveira; Fábio M. Bayer; Renato J. Cintra (Signal Process. Image Commun., 2022)

Radix-$N$ Algorithm for Computing $N^{2^{n}}$-Point DFT Approximations. - Luan Portella; Diego F. G. Coelho; Fábio M. Bayer; Arjuna Madanayake; Renato J. Cintra (IEEE Signal Process. Lett., 2022)

A Class of Low-Complexity DCT-Like Transforms for Image and Video Coding. - Thiago L. T. da Silveira; Diego Ramos Canterle; Diego F. G. Coelho; Vítor de A. Coutinho; Fábio M. Bayer; Renato J. Cintra (IEEE Trans. Circuits Syst. Video Technol., 2022)

Robust Rayleigh Regression Method for SAR Image Processing in Presence of Outliers. - Bruna Gregory Palm; Fábio M. Bayer; Renato B. Machado; Mats I. Pettersson; Viet Thuy Vu; Renato J. Cintra (IEEE Trans. Geosci. Remote. Sens., 2022)

Analog Current-Mode 8-Point Approximate-DFT Multi-Beamformer With 4.7 Gbps Channel Capacity. - Haixiang Zhao; Arjuna Madanayake; Renato J. Cintra; Soumyajit Mandal (IEEE Access, 2023)

Low-complexity Multidimensional DCT Approximations. - Vítor de A. Coutinho; Renato J. Cintra; Fábio M. Bayer (CoRR, 2023)

Extensions on Low-Complexity DCT Approximations for Larger Blocklengths Based on Minimal Angle Similarity. - Anabeth P. Radünz; Luan Portella; Raíza S. Oliveira; Fábio M. Bayer; Renato J. Cintra (J. Signal Process. Syst., 2023)

Prediction intervals in the beta autoregressive moving average model. - Bruna Gregory Palm; Fábio M. Bayer; Renato J. Cintra (Commun. Stat. Simul. Comput., 2023)

Real-time 5.7 GHz Realization of Multidimensional 2D Hybrid Approximate DFT Spectrum Sensors for RF Situational Awareness. - Arjuna Madanayake; Keththura Lawrance; Sivakumar Sivasankar; Umesha Kumarasiri; Buddhipriya Gayanath; Renato J. Cintra; Soumyajit Mandal (MWSCAS, 2024)

Discrete Fourier Transform Approximations Based on the Cooley-Tukey Radix-2 Algorithm. - Diego F. G. Coelho; Renato J. Cintra (CoRR, 2024)

An Approximation for the 32-point Discrete Fourier Transform. - Renato J. Cintra (CoRR, 2024)

Design of Multichannel Spectrum Intelligence Systems Using Approximate Discrete Fourier Transform Algorithm for Antenna Array-Based Spectrum Perception Applications. - Arjuna Madanayake; Keththura Lawrance; Bopage Umesha Kumarasiri; Sivakumar Sivasankar; Thushara K. Gunaratne; Chamira U. S. Edussooriya; Renato J. Cintra (Algorithms, 2024)

Fast data-independent KLT approximations based on integer functions. - Anabeth P. Radünz; Diego F. G. Coelho; Fábio M. Bayer; Renato J. Cintra; Arjuna Madanayake (Multim. Tools Appl., 2024)

Low-Complexity Combined Approximate DFT and Adaptive Beamformer for Extremely Large Arrays. - Arjuna Madanayake; Umesha Kumarasiri; S. Sivasankar; Chamira U. S. Edussooriya; Renato J. Cintra; Chamith Wijenayake (ISCAS, 2025)

Analog-Digital Approximate DFT with Spatial ∆-Σ LNA Multi-beam RF Apertures. - Arjuna Madanayake; H. Pilippange; Keththura Lawrance; A. Uddin; S. Mandal; J. Di; M. Tennant; C. Workman; Renato J. Cintra (ISCAS, 2025)

Area-Efficient FPGA Architectures for Multidimensional DCT using Approximate Transforms and Computing. - Pathmapirian Nanthakumar; Chamith Wijenayake; Chamira U. S. Edussooriya; Arjuna Madanayake; Renato J. Cintra (ISCAS, 2025)

Real-Time 5.7-5.8 GHz 32-Beam Approximate Discrete Fourier Transform Spectrum Sensor for RF Perception on Xilinx Sx475T. - Arjuna Madanayake; Umesha Kumarasiri; Sivakumar Sivasankar; Keththura Lawrance; Buddhipriya Gayanath; Hiruni Silva; Soumyajit Mandal; Renato J. Cintra (IEEE Trans. Circuits Syst. I Regul. Pap., 2025)