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   Medical Signal Processing

Journals Publications

  1. A. G. Ramakrishnan and J. V. Satyanarayana, "Reconstruction of EEG from limited channel acquisition using estimated signal correlation," in press, Biomedical Signal processing & Control, 2016.(Download)

  2. A. G. Ramakrishnan, A.P. Prathosh and T. V. Ananthapadmanabha, "Threshold-Independent QRS Detection using the Dynamic Plosion Index," IEEE Signal Processing Letters, May 2014, Vol. 21, No. 5, pp. 554 - 558.(Download)

  3. M.D.Livera, B.Priya, A.Ramesh, P.N.Suman Rao, V.Srilaxmi, M.Nagapoornima, A.G.Ramakrishnan, M.Dominic and Swarnarekha, "Spectral analysis of noise in the neonatal intensive care unit," Indian Journal of Paediatrics, March 2008, Vol. 75, No. 3, pp. 217-222. (Download)

  4. R.Srikanth and A.G.Ramakrishnan, "Wavelet-based Estimation of Hemodynamic Response Function from fMRI data," International Journal for Neural Systems, World scientific publishing company, April 2006, Volume 16, No. 2, pp. 125-138. (Download)

  5. M.V.S.Phani Narasimham and A.G.Ramakrishnan, "An Efficient Wavelet VQ Coder for ECG," Medical & Life Sciences Engineering, Vol. 15, Jan. 2006, pp. 13-19. (Download)

  6. G.Sita and A.G.Ramakrishnan, " Wavelet domain nonlinear filtering for evoked potential enhancement," Computers and Biomed. Research, 2000, 33, pp. 431-446. (Download)

  7. P.Raghuraj, A.G.Ramakrishnan, H.R.Nagendra and Shirley Teles, "Effect of two selected yogic breathing techniques on heart rate variability," Ind. J. Physiol. Pharmacol., 1998, Vol. 42, No. 4, pp. 467-472.

  8. I.Rajan, P.J.Naga Venkatesha Murthy, A.G.Ramakrishnan, B.N.Gangadhar and N.Janakiramaiah, " Heart rate variability as an index of cue reactivity in alcoholics," Biological Psychiatry, 1998, Vol. 43, pp. 544-546. (Download)

  9. A.G.Ramakrishnan and S.Saha, "ECG coding by wavelet-based linear prediction," IEEE Trans. Biomed. Eng., 1997, Vol. 44, No. 12, pp. 1253-1261. (Download)

  10. M.S.Jayaprakash, A.G.Ramakrishnan, P.J.N.V.Murthy, B.N.Gangadhar and N.Janakiramaiah, "Subclinical autonomic neuropathy in alcoholics: Decreased heart rate variability," NIMHANS Journal, July 1997, Vol. 15, No. 3, pp. 219-223. (Download)

  11. A.G.Ramakrishnan and Supratim Saha, "ECG Compression by multirate processing of beats," Computers & Biomed. Res., Oct. 1996, Vol. 29, pp. 407-417. (Download)

  12. A.G. Ramakrishnan and T.M. Srinivasan, "Electrophysiological correlates of hanseniasis," International Journal of Leprosy, Sept 1995, Vol. 63, No.3, pp. 395-408. (Download)

Technical Reports

  1. J V Satyanarayana and A G Ramakrishnan, “Compressed EEG Acquisition with Limited Channels using Estimated Signal Correlation,” arXiv preprint arXiv:1407.1285, July 2014. (Download)

Conference Publications

  1. R.Srikanth, R.Muralishankar and A.G.Ramakrishnan, "Wavelet-based estimation of Hemodynamic Response Function," Proc. ICONIP-2004, Calcutta, Nov 22-25, 2004, pp. 1285-1291.

  2. R.Srikanth and A.G.Ramakrishnan, "Parameter Estimation of HRF and Classification of fMRI data using Probabilistic PCA Modeling," Proc. V International Conf Adv in Pattern Recognition (ICAPR 2003), ISI, Kolkata, Dec 10-13, 2003. (Download)

  3. R.Srikanth, A.G.Ramakrishnan and P.N.Jayakumar, "Signal Subspace Enhancement and MAP Parameter Estimation of fMRI Signals," IEEE TENCON-03, Oct 15-17, Bangalore, 2003, Vol 2, pp. 520-524. (Download)

  4. K G Aparna, G L Jayavardhana Rama and A G Ramakrishnan, , "Machine Reading of Tamil Books - An Aid for the Blind," Proc. International Conf. on Biomedical Engg., Bangalore, Dec. 21-24, 2001, pp. 173-177. (Download)

  5. A.G.Ramakrishnan and Aruna Ragu, "Windows based package for heart rate variability analysis," Proc. International Conf. on Biomedical Engg., Bangalore, Dec. 21-24, 2001, pp. 241-245 (Download)

  6. G.Sita and A.G.Ramakrishnan, "Spatially selective Wiener filtering in the wavelet domain for EP estimation," Proc. International Conf. on Biomedical Engg., Bangalore, Dec. 21-24, 2001, pp. 178-184 (Download)

  7. B.N.Gangadhar, D.K.Subbakrishna, A.G.Ramakrishnan, E.S.M.Saravanan, G.Umamaheswara Rao and N.Janakiramaiah, " Fractal dimension of seizure EEG during ECT predicts therapeutic effects in depression," Proc. International Conf. on Biomedical Engg. BioVision 2001, Bangalore, Dec. 21-24, 2001, pp. 168-172. (Download)

  8. G.Sita and A.G.Ramakrishnan, " Evoked potential Signal estimation using Gaussian Radial Basis Function Network," Proc. Intern. Conf. Neural Networks (ICANN 2001), Vienna, Austria, Aug. 21-24, 2001, pp. 630 to 635. (Download)

  9. G.Sita and A.G.Ramakrishnan, " Adaptive Volterra filter for evoked potential estimation," Proc. Symposium on BME and Nuclear Medicine, Mumbai, India, Jan. 27-29, 2000, pp. 8-14.

  10. A.G.Ramakrishnan and M.V.S.Phani Narasimham, " Beat Adaptive VQ Coder for ECG," Proc. European Medical & Biological Engineering Conference-EMBEC'99, Vienna, Austria, Nov. 04 - 07, 1999.

  11. R.Murali Shankar and A.G.Ramakrishnan, " Topographic mapping of the brain electrical activity," Proc. National Conf. Biomed. Eng., Manipal, April 9-11, 1998, pp. III-7 to III-9. (Download)

  12. M.V.S.Phani Narasimham and A.G.Ramakrishnan, " ECG Compression using adaptive vector quantiser," Proc. National Conf. Biomed. Eng., Manipal, April 9-11, 1998, pp. II-4 to II-6. (Download)

  13. Shah Anup Ushakant and A.G.Ramakrishnan, " Holter ECG Compression using DSP," Proc. Nat. Conf. Biomed. Eng., Manipal, April 9-11, 1998, pp. II-39 to II-41. (Download)

  14. A.G.Ramakrishnan, " A novel technique for QRS Detection," Proc. National Conf. Adv. in Biomed. Eng., Cochin, Sept. 4-6, 1997. pp. I-38 to I-41.

  15. M.V.S.Phani Narasimham and A.G.Ramakrishnan, " Compression schemes for ECG with good reconstruction in the QRS zone," Proc. National Conf. Adv. in Biomed. Eng., Cochin, Sept. 4-6, 1997, pp. I-34 to I-37.

  16. G.Sita and A.G.Ramakrishnan," EP signal reconstruction from bispectral domain," Proc. National Conf. Adv. in Biomed. Eng., Cochin, Sept. 4-6, 1997, pp. I-30 to I-33.

  17. A.G.Ramakrishnan, " Heart Rate Variability Analysis - an Overview," M.I.T. Technical Review, Vol. 6, May 1997, pp. 20-23. (Download)

  18. S.Saha and A.G.Ramakrishnan, " Transmission of Chosen Transform Coefficients of Normalized Cardiac Beats for Compression," Proc. ICASSP '97, Munich, Germany, Apr. 20-24, 1997, Vol. 3, pp. 1901-1904. (Download)

  19. S.Saha and A.G.Ramakrishnan, " Off-line coding of multichannel ECG," in Current trends in Biomedical Engineering, S. Radhakrishnan and M. Ramasubba Reddy, Ed. New Delhi: Allied Publishers Ltd., 1996, pp. 137-140.

  20. Kaushik Basu, B.N.Gangadhar and A.G.Ramakrishnan, " Estimation of nonlinear parameters for characterizing HRV," in Proc. XV Ann. Conf. Biomed. Engg. Society of India, Coimbatore, 12-14, Dec. 1996, PP.I-9 to I-13.

  21. A.G.Ramakrishnan and S.Saha, " Vector Quantization of ECG Beats," in Proc. XV Ann. Conf. Biomed. Engg. Society of India, Coimbatore, Dec. 14-16, 1996, pp. VII.30-VII.32.

  22. G.Sita and A.G.Ramakrishnan, " Filtering and Latency Correction for Improved EP Estimation," Proc. XV Ann. Conf. Biomed. Engg. Soc. of India, Coimbatore, Dec. 14-16, 1996, pp. III.20-III.24.

  23. A.G.Ramakrishnan, " Research in yoga and meditation and heart rate variability," in Proc. of the III Intern. Conf. Res. and Appln. of Yoga, Bangalore, Dec. 23-27, 1995.

  24. G.Sita and A.G.Ramakrishnan, " Signal estimation techniques in event related potential research," M.I.T. Technical Review, Vol. 5, pp. 46-50, Dec. 1995.

  25. G.Sita, R.V.S.Sastry and A.G.Ramakrishnan, " Time Varying Filters for Estimation of Evoked Potentials," in Proc. First Regional International Conf IEEE - Engineering in Medicine and Biology Society, New Delhi, February 15-18, 1995, pp. 3.33 - 3.34.(Download)

  26. A.G.Ramakrishnan and R.V.S.Sastry, " Wavelet transforms for compound nerve action potential analysis," in Proc. First Regional International Conf IEEE - Engineering in Medicine and Biology Society, New Delhi, February 15-18, 1995, pp.2/70-2/71.(Download)

  27. A.G.Ramakrishnan, " Estimation of Degree of Pathology of Nerve Fibers," in Proc. of the World Congress on Medical Physics and Biomedical Engineering, Rio de Janeiro, Brazil, 21-26, August 1994.

  28. T.M.Srinivasan and A.G.Ramakrishnan, " Central conduction in Leprosy - a multidomain study," Proc. IEEE EMBS, Paris, Oct 29-Nov 1, 1992, Vol 6, pp. 2491-2492. (Download)

  29. Budagavi Madhukar, I.S.N.Murthy and A.G.Ramakrishnan, " Modelling of compound nerve action potentials in health and disease," Proc. IEEE EMBS, Paris, Oct 29-Nov 1, 1992, Vol 6, pp. 2600-2601. (Download)

  30. A.G.Ramakrishnan and T. M. Srinivasan, "Brain Hemispheric Activity during Forced Nostril Breathing,"Proc. First Annual Conference of International Society for the Study of Subtle Energies and Energy Medicine, Boulder, CO, USA, June 21-25, 1991, pp. 85-88. (Download)
\A9 2009 Medical Intelligence and Language Engineering Lab - IISc Campus, Bangalore.