Renato da Rocha Lopes

Assistant Professor

Department of Communications – DECOM
School of Electrical and Computer Engineering – FEEC
University of Campinas – UNICAMP

Av. Albert Einstein, 400
13083-852 Campinas – SP – Brazil

Room: 328
Phone: + 55 (19) 3521-3833
Fax: + 55 (19) 3521-3866
e-mail: rlopes@decom.fee.unicamp.br

CV (Lattes, in Portuguese): here


Courses (in Portuguese)

Education

Research Interests

Publications

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Journal Publications

  1. A. K. Takahata, E. Z. Nadalin, R. Ferrari, L. T. Duarte, R. Suyama, R. R. Lopes, J. M.T. Romano, and M. Tygel, “Unsupervised Processing of Geophysical Signals,” IEEE Signal Processing Magazine, v. 29, n. 4, p. 27 – 35, Jul. 2012. (pdf)
  2. Fabio G. Fernandes, Renato R. Lopes and D. Zanatta Filho, “SINR Bounds for Broadcast Channels with Zero-Forcing Beamforming and Limited Feedback,” IEEE Transactions on Communications, v. 60, n. 7, p. 1772 – 1776, July 2012. (pdf)
  3. M. B. Loiola, R. R. Lopes and J. M. T. Romano, “Modified Kalman Filters for Channel Estimation in Orthogonal Space-Time Coded Systems,” IEEE Transactions on Signal Processing, v. 60, n. 1, p. 533 – 538, Jan. 2012. (pdf)
  4. M. B. Loiola, R. R. Lopes and J. M. T. Romano, “Blind turbo receivers with fast least-squares channel estimation and soft-feedback equalization,” Electronics Letters, v. 46, p. 1464 – 1465, Oct. 2010. (pdf)
  5. D. Zanatta Filho, R. R. Lopes, R. Ferrari, M. B. Loiola, R. Suyama, G. C. C. P. Simões and B. Dortschy, “Achievable rates of DSL with crosstalk cancellation,” European Transactions on Telecommunications, vol. 20, no. 1, pp. 81 – 86, Dec. 2008. (pdf)
  6. T. F. Pegoraro, F. A. L. Gomes, F. Lumertz, R. R. Lopes, F. A. Oliveira and R. Gallo, “Codificação LDPC em Sistemas de TV Digital,” Revista do Instituto Nacional de Telecomunicações, pp. 25 – 34, vol. 9, no. 2, Jul. 2007 (in Portuguese). (pdf)
  7. R. D. Souza, J. Garcia-Frias and R. R. Lopes, “Turbo Equalization for Block Fading MIMO Channels Using Random Signal Mapping,” Computers and Electrical Engineering, pp. 79 – 87, vol. 33, no. 2, Mar. 2007. (pdf)
  8. R. R. Lopes and J. R. Barry, “ The Soft-Feedback Equalizer for Turbo Equalization of Highly Dispersive Channels,” IEEE Transactions on Communications, pp. 783 – 788, vol. 54, no. 5, May 2006. (pdf)
  9. M. V. Ribeiro, R. Lopes, J. M. T. Romano, C. A. Duque, “Impulse Noise Mitigation based on Computational Intelligence for Improved Bit Rate in PLC-DMT,” IEEE Trans. Power Delivery, pp. 94 – 101, vol. 21, no. 1, Jan. 2006. (pdf)
  10. W. C. Freitas JR., F. R. P. Cavalcanti and R. R. Lopes, “Hybrid Transceiver Schemes for Spatial Multiplexing and Diversity in MIMO Systems,” Journal of Communication and Information Systems, v. 20, p. 63 – 76, 2005. (pdf)
  11. R. R. Lopes and John. R. Barry, “The Extended-Window Channel Estimator for Iterative Channel-and-Symbol Estimation,” EURASIP Journal on Wireless Communications and Networking, pp. 92 – 99, April 2005. (pdf)
  12. P. Supnithi, R. R. Lopes and S. W. McLaughlin, “Reduced-Complexity Turbo Equalization for High-Density Magnetic Recording Systems,” IEEE Trans. Magnetics, pp. 2585 – 2587, vol. 39, no. 5, Sep. 2003. (pdf)

Conference Publications

  1. L. T. Duarte, R. R. Lopes, J. H. Faccipieri Júnior and M. Tygel, “Separation of Reflection from Diffraction Events via the CRS Technique and a BSS Method,” 13th International Congress of the Brazilian Geophysical Society (SBGf'13), Rio de Janeiro, 2013. (pdf)
  2. T. T. Barros, R. Krummenauer, R. Ferrari, R. R. Lopes and M. Tygel, “The Impact of the Parameter Estimation Strategy in the CRS Method,” 13th International Congress of the Brazilian Geophysical Society (SBGf'13), Rio de Janeiro, 2013. (pdf)
  3. T. T. Barros, R. R. Lopes, J. M. T. Romano and M. Tygel, “Implementation Aspects of Eigenstructure Based Velocity Spectra,” 74th Conference of the European Association of Geoscientists and Engineers (EAGE'12), Copenhagen, 2012. (pdf)
  4. M. B. Loiola, R. R. Lopes and J. M. T. Romano, “Kalman Filter-Based Channel Tracking in MIMO-OSTBC Systems,” IEEE Global Telecommunications Conference (GLOBECOM'09), Honolulu, 2009. (pdf)
  5. R. G. Machado, L. G. P. Meloni e R. R. Lopes, “A New Approach for Joint Channel Estimation and Data Detection in MIMO Wireless Systems,” 43rd Asilomar Conference on Signals, Systems and Computers, 2009. (pdf)
  6. R. Ferrari, R. Suyama, R. R. Lopes, R. R. F. Attux, J. M. T. Romano, “An Optimal MMSE Fuzzy Predictor for SISO and MIMO Blind Equalization,” Workshop on Cognitive Information Processing (CIP 2008), Santorini, Grécia, 2008. (pdf)
  7. M. B. Loiola and R. R. Lopes, “A State-Space Approach to Semi-Blind Signal Detection in Fast Frequency-Selective Fading MIMO Channels,” IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC'08), Recife, 2008. (pdf)
  8. Fabio G. Fernandes, Renato R. Lopes and D. Zanatta Filho, “Zero-Outage Strategy For Multi-Antenna Broadcast Channels With Limited Feedback,” IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC'08), Recife, 2008. (pdf)
  9. F. S. Chaves, F. G. Fernandes, R. R. Attux, R. Suyama and R. R. Lopes, “Une analyse du problème de l'égalisation basée sur la théorie des jeux,” XXI Coloque GRETSI sur le Traitement du Signal et des Images - GRETSI'07, Troyes, France, 2007. (pdf)
  10. W. C. Freitas JR., F. R. P. Cavalcanti and R. R. Lopes, “MIMO Transmit Structure Assignment with QoS Provision in Wireless Systems,” IEEE Annual International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC 2007), Athens, 2007. (pdf)
  11. M. V. Ribeiro, M. B. Loiola and R. R. Lopes, “Turbo-Fuzzy Equalization for Single-Carrier Power Line Channels,” IEEE International Symposium on Power Line Communications and Its Applications, pp. 26 – 28, Pisa, Italy, March 2007. (pdf)
  12. D. Zanatta Filho, R. R. Lopes, R. Ferrari, R. Suyama, B. Dortschy, “Bit Loading for Precoded DSL Sytems,” IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), vol. III, pp. 353 – 356, Honolulu, Apr. 2007. (pdf)
  13. W. C. Freitas JR., F. R. P. Cavalcanti and R. R. Lopes, “Hybrid MIMO Transceiver Scheme with Antenna Allocation and Partial CSI at Transmitter Side,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2006), Helsinki, 2006. (pdf)
  14. Tarciano F. Pegoraro, Fábio A. L. Gomes, Renato R. Lopes, Roberto Gallo, José S. G. Panaro, Marcelo C. Paiva, Fabrício A. Oliveira and Fábio Lumertz, “Design, Simulation and Hardware Implementation of a Digital Television System: LDPC channel coding,” (Invited Paper) IEEE International Symposium on Spread Spectrum Techniques and Applications, pp. 203 – 207, Fortaleza, Sep. 2006. (pdf)
  15. D. Zanatta Filho, R. R. Lopes, R. Ferrari, M. B. Loiola, G. Simoes, C. Wada, J. M. T. Romano, B. Dortschy and J. Rius i Riu, “The Capacity of Binders for Mimo Digital Subscriber Lines,” IEEE International Telecommunications Symposium, pp. 717 – 722, Fortaleza, Sep. 2006. (pdf)
  16. R. D. Souza, J. Garcia-Frias and R. R. Lopes, “Reduced Complexity Turbo Equalization for MIMO Channels Using Random Signal Mapping,” IEEE Vehicular Technology Conference, pp. p. 957 – 961, Dallas, Fall 2005. (pdf)
  17. E. Chesnutt, R. R. Lopes and J. R. Barry, “Beyond PRML: Linear-Complexity Turbo Equalization Using the Soft-Feedback Equalizer,” IEEE International Magnetics Conference, pp. 1599 – 1600, Nagoya, 2005. (pdf)
  18. W. C. Freitas Jr., A. L. F. de Almeida, F. R. P. Cavalcanti and R. R. Lopes, “Exploiting Dimensions of the MIMO Wireless Channel: Multidimensional Link Adaptation,” IEEE Vehicular Technology Conference, pp. 924 – 928, Stockholm, Spring 2005. (pdf)
  19. R. R. F. Attux, R. R. Lopes, L. N. de Castro, F. J. Von Zuben, J. M. T. Romano, “Genetic Algorithms for Blind Maximum-Likelihood Receivers,” IEEE International Workshop on Machine Learning for Signal Processing, pp. 685 – 694, Brazil, Sep. 2004. (pdf)
  20. R. R. Lopes and J. R. Barry, “Soft-Output Decision-Feedback Equalization with a Priori Information,” IEEE Global Communications Conference (Globecom'03), vol. 3, pp. 1705 – 1709, 2003. (pdf)
  21. R. R. Lopes and J. R. Barry, “Exploiting Error-Control Coding in Blind Channel Estimation,” IEEE Global Communications Conference (Globecom'01), vol. 2, pp. 1317 – 1321, San Antonio, TX, November 2001. (pdf)
  22. R. R. Lopes and J. R. Barry, “Blind Iterative Channel Identification and Equalization,” IEEE International Conference on Communications (ICC2001), pp. 2256 – 2260, Helsink, June 2001. (pdf)
  23. C.-C. Yeh, R. R. Lopes and J. R. Barry, “Approximate Minimum Bit-Error Rate Multiuser Detection,” IEEE Global Communications Conference (Globecom'98), vol. 6, pp 3590 – 3595, Sydney, November 1998. (pdf)
  24. R. R. Lopes, C. A. F. Rocha and J. M. T. Romano, “Predictive Self-Learning Equalization for Mobile Radio Channels: An LMS×RLS Comparison,” IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC'97), pp. 357 – 360, Paris, April 1997. (pdf)
  25. O. A. Sousa Filho, R. R. Lopes, J. E. V. Bautista, J. M. T. Romano and M. D. Yacoub, “Blind Equalizers Applied to Mobile Radio Channels,” Proc. IEEE International Telecommunications Symposium, Acapulco (Mexico), Oct. 1996.

Brazilian Conference Publications

  1. R. R. Lopes, “Estratégias Para Ensino De Engenharia,” XXXI Simpósio Brasileiro de Telecomunicações, Fortaleza, Setembro 2013. (pdf)
  2. M. R. Covre, T. T. L. Barros, A. K. Takahata and R. R. Lopes, “Imageamento De Difrações Sísmicas Baseado Em Métodos De Alta-Resolução,” XXXI Simpósio Brasileiro de Telecomunicações, Fortaleza, Setembro 2013. (pdf)
  3. M,. Cazarotto and R. R. Lopes, “Codificação Para o Canal Gaussiano De Múltiplo Acesso,” XXXI Simpósio Brasileiro de Telecomunicações, Fortaleza, Setembro 2013. (pdf)
  4. J. M. T. Romano, R. R. Lopes e M. Tygel, “Processamento Digital de Sinais Geofísicos,” XXIX Simpósio Brasileiro de Telecomunicações, Curitiba, Outubro 2011. (pdf)
  5. M. R. Covre e R. R. Lopes, “Proposta de Redução de Estados em Receptores MLSE para Comunicações Ópticas,” XXIX Simpósio Brasileiro de Telecomunicações, Curitiba, Outubro 2011. (pdf)
  6. R. G. Machado, L. G. P. Meloni e R. R. Lopes, “Joint Channel Estimation and Data Detection with Cubature Kalman Filters,” XXVII Simpósio Brasileiro de Telecomunicações, Blumenau, Setembro 2009. (pdf)
  7. R. R. Ferrari, R. R. Lopes e J. M. T. Romano, “On the convergence of iterative discrete bit loading for autonomous spectrum management in DSL systems; XXVII Simpósio Brasileiro de Telecomunicações, Blumenau, Setembro 2009. (pdf)
  8. M. B. Loiola, R. R. Lopes e J. M. T. Romano, “Estimação Semicega de Canais com Correlação Usando Filtro de Kalman e Códigos Espaço-Temporais,” XXVI Simpósio Brasileiro de Telecomunicações, RJ, Setembro 2008. (pdf)
  9. M. B. Loiola, R. R. Lopes e J. M. T. Romano, “Equalização Turbo: Fundamentos e Aplicações,” XXII Simpósio Brasileiro de Telecomunicações, Campinas, Setembro 2005. (pdf)
  10. M. B. Loiola, R. R. Lopes e J. M. T. Romano, “Receptores Turbo Cegos de Baixa Complexidade,” XXII Simpósio Brasileiro de Telecomunicações, Campinas, Setembro 2005. (pdf)
  11. W. C. Freitas Jr., F. R. P. Cavalcanti and R. R. Lopes, “Solving the Bottleneck in the Hybrid MIMO Transceiver Scheme: Channel Coding vs. Partial CSI at Transmitter Side,” XXII Simpósio Brasileiro de Telecomunicações, Campinas, Setembro 2005. (pdf)
  12. R. D. Souza, R. R. Lopes e J. Garcia-Frias, “Equalização Turbo com Complexidade Reduzida para Canais MIMO usando Mapeamento Aleatório,” XXII Simpósio Brasileiro de Telecomunicações, Campinas, Setembro 2005. (pdf)
  13. O. A. Sousa Filho, R. R. Lopes, J. E. V. Bautista, J. M. T. Romano e M. D. Yacoub, “Considerações Sobre a Aplicabilidade de Equalizadores Cegos em Comunicações Móveis,” XIV Simpósio Brasileiro de Telecomunicações, Curitiba, Julho 1996.

visits since 12/09/2006.