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Conferences

             

                                                                                2023

  1.  P. Namsopa, S. Koonkarnkhai, P. Kovintavewat, H. Dinsakul, S. Suwansawang, "A study and exploration of discrete wavelet transform for speckle noise reduction in ultrasound images," in Proc. of The 38th ITCCSCC-2023, Grand Hyatt Jeju, Republic of Korea, June 25 - 28, 2023.

  2. K. A. Fatika, S. Koonkarnkhai, P. Kovintavewat, C. Warisarn, "Neural networks input techniques to maintain a small skew angle in bit-patterned magnetic recording with a V-shaped read-head array," in Proc. of The 38th ITCCSCC-2023, Grand Hyatt Jeju, Republic of Korea, June 25 - 28, 2023. 

                                                                           2022

  3. A. Khametong, N. Rueangnetr, C. Warisarn, S. Koonkarnkhai, P. Kovintavewat, "Deep neural networks based soft-information improvement for two-head/two-track bit-patterned magnetic recording," in Proc. of International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) 2022, Nov. 22 - 25, 2022, Penang, Malaysia.

  4. J. Praiwan, C. Buajong, M. Mattayakan, C. Warisarn, S. Koonkarnkhai, P. Kovintavewat, "Soft information scheme based multilayer perceptron in coded vit-patterned media recording system," in Proc. of International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) 2022, Nov. 22 - 25, 2022, Penang, Malaysia.

  5. N. Rueangnetr, C. Warisarn, S. Koonkarnkhai, P. Kovintavewat, "Soft information adjustor four-head/two-track (4H/2T) bit-patterned magnetic recording," in Proc. of International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) 2022, Nov. 22 - 25, 2022, Penang, Malaysia.

  6. C. Buajong, S. Koonkarnkhai, P. Kovintavewat, C. Warisarn, "A rate-7/8 modulation code for double-track reading scheme in BPMR systems," in Proc. of The 67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022), IOB-6, Minneapois, MN, USA, Oct 31 - Nov 4, 2022.

  7. N. Rueangnetr, S. Koonkarnkhai, P. Kovintavewat, C. Warisarn, "Double-layer magnetic recording with multilayer perceptron decoder for single-reader/two-track reading in BPMR systems," in Proc. of The 67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022), IOB-7, Minneapois, MN, USA, Oct 31 - Nov 4, 2022.

  8. M. Mattayakan, S. Koonkarnkhai, P. Kovintavewat, C. Warisarn, "A study of bit island spacing optimization of staggered patterned mrdia-based SRTR scheme in BPMR systems," in Proc. of The 67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022), IOB-8, Minneapois, MN, USA, Oct 31 - Nov 4, 2022.

  9. K. Fatika, S. Koonkarnkhai, P. Kovintavewat, C. Warisarn, "Skew angle estimation and alleviation based multi-laYer perceptron in V-shaped read-head array BPMR systems," in Proc. of The 67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022), IOB-11, Minneapois, MN, USA, Oct 31 - Nov 4, 2022.

  10. N. Rueangnetr, C. Warisarn, S. Koonkarnkhai, and P. Kovintavewat, "3/5 decoder and LLR estimator-based multilayer perceptron for SRTR bit-patterned magnetic recording," in Proc. of The 19th ECTI-CON 2022, Prachuap Khiri Khan, Thailand, May 24 - 27, 2021.      

                                                                           2021

  11. K. Kankhunthod, C. Warisarn, S. Koonkarnkhai, and P. Kovintavewat, "Multilayer perceptron-based skew-angle estimation for bit-patterned magnetic recording," in Proc. of The 36th ITCCSCC-2021, Grand Hyatt Jeju, Republic of Korea, June 28 - 20, 2021.(Online Conference)

  12. J. Praiwan, C. Warisarn, S. Suwansawang, and S. Koonkarnkhai, "Soft-information improvemant using multilayer perceptron (MLP) in bit-patterned magnetic recording (BPMR) systems," in Proc. of The 36th ITCCSCC-2021, Grand Hyatt Jeju, Republic of Korea, June 28 - 20, 2021. (Online Conference)

  13. C. Buajong, C. Warisarn, S. Koonkarnkhai, and P. Kovintavewat, "An intertrack interference (ITI) subtraction scheme for bit-patterened media recording," in Proc. of The 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), Online Conference, May 19 - 22, 2021.   

  14. S. Sokjabok, M. Mattayakan, C. Warisarn, S. Koonkarnkhai, and P. Kovintavewat, "Symbol-flipping method for block decoding in bit-patterned magnetic recording," in Proc. of The 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), Online Conference, May 19 - 22, 2021.

                                                                           2020

  15. S. Koonkarnkhai, C. Warisarn, and P. Kovintavewat, "A simple skew-Angle detection and alleviation method based on readback signal in bit-patterned magnetic recording systems," in Proc. of The 65th Annual Conference on Magnetism and Magnetic Materials (MMM 2020), Virtual Conference, November 2 - 6, 2020.   Poster

  16. S. Sokjabok, M. Mattayakan, C. Buajong, S. Koonkarnkhai, P. Kovintavewat, and C. Warisarn, "Constrained codes for single-reader/two-track reading technique in bit-patterned magnetic recording systems," in Proc. of The 65th Annual Conference on Magnetism and Magnetic Materials (MMM 2020), Virtual Conference, 2020.   

  17. S. Sokjabok, C. Warisarn, S. Koonkarnkhai, and J. Lee, "Modified 2D Viterbi algorithm using 2D modulation encoding constraints in BPMR systems," in Proc. of The 17th ECTI-2020, Thailand, June 24-27, 2020. (Best Paper Award)

                                                                       2019

  18. S. Koonkarnkhai, C. Warisarn, N. Chirdchoo, and P. Kovintavewat, "A soft ITI mitigation method for coded 2H2T BPMR systems," in Proc. of The 34th ITCCSCC-2019, Jeju Shinhwa Wold, Korea,June 23-26, 2019.

  19. S. Pomsanam, C. Warisarn, W. Busyatrus, L. M. M. Myint, S. Koonkarnkhai, and P. Kovintavewat, "Simple coding method with single-reader two-track reading (SRTR) in bit-patterned media recording (BPMR) systems," in Proc. of The 34th ITCCSCC-2019, Jeju Shinhwa Wold, Korea,June 23-26, 2019.

  20. W. Tipcharoen, C. Warisarn, L. M. M. Myint, S. Koonkarnkhai, and P. Kovintavewat, "Transition shift in head-assisted magnetic recording," in Proc. of The 34th ITCCSCC-2019, Jeju Shinhwa Wold, Korea,June 23-26, 2019.

  21. P. Kovintavewat, S. Koonkarnkhai, and C. Warisarn, "A simple 2-head 2-track detection method for staggered bit-patterened media recording," in Proc. of  2019 Joint MMM-Intermag Conference, DH-04, Washington, DC, USA, January 14 - 18, 2019. 

  22. T. Chumpuwiset, C. Warisarn, L.M.M. Myint, S. Koonkarnkhai and P. Kovintavewat, "Modified 2D Viterbi algorithm using 2D modulation encoding constraint in bit-patterned magnetic recording," in Proc. of 2019 Joint MMM-Intermag Conference, CQ-03, Washington, DC, USA, January 14 - 18, 2019. 

                                                                        2018

  23. S. Koonkarnkhai, and P. Kovintavewat, "A simple 2-head 2-track detection method for bit-patterned magnetic recording systems," in Proc. of The 18-th International Symposium on Communications and Information Technologies (ISCIT 2018), Bangkok, Thailand, September 26 - 29, 2018, pp. 490 - 494. 

  24. T. Chumpuwiset, C. Warisarn, L. M. M. Myint, S. Koonkarnkhai, and P. Kovintavewat, "Complexity reduction of 2D detector using 2D modulation encoding constraint in multi-track multi-head BPMR systems," in Proc. of The 33-rd International Technical Conference on Circuit/Systems, Computers and Communication (ITC-CSCC 2018), Bangkok,Thailand, July 4-7, 2018, pp. 536 - 538.   

  25. W. Busyatras, C. Warisarn, S. Koonkarnkhai, and P. Kovintavewat, "A track mis-registration estimation method based on a ratio value of readback signals in bit-patterned media recording systems ," in Proc. of The 33-rd International Technical Conference on Circuit/Systems, Computers and Communication (ITC-CSCC 2018), Bangkok,Thailand, July 4-7, 2018, pp. 539 - 542. 

                                                                              2017   

  26. I. Nokyotin, S. Koonkarnkhai, W. Wongtrairat, T. Sopon,"Layered generalized belief propagation detection on BPMR system with multi-track processing," in Proc. of International Electrical Engineering Congress (iEECON) 2017, Pattaya, Thailand, March 8-10, 2017, pp. 1 - 4.

  27. K. Buahing, W. Busyatras, C. Warisarn, S. Koonkarnkhai and P. Kovintavewat, "2D modulation code together with multi-track recording technique in staggered BPMR systems," in Proc. The 32-nd International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2017), Busan, Korea, July 2-5, 2017.

  28. C. Warisarn, W. Busyatras, L.M.M. Myint,  S. Koonkarnkhai, and P. Kovintavewat  "A TMR mitigation method with 3-track data detection for multi-track multi-head BPMR system" in Proc. of IEEE International Magnetics Conference 2017 (INTERMAG 2017), DE-05, Dubling, Ireland, April 24-28, 2017.
                                                                                  2016
  29. K. Buahing, W. Busyatras, C. Warisarn, S. Koonkarnkhai, and P. Kovintavewat  "A performance improvement of a rate-5/6 2D modulation code in bit-patterned media recording systems" in Proc. of The 31-st International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2016), Okinawa, Japan, July 10-13, 2016.
                                                                                  2015
  30. สันติ กูลการขาย และ ปิยะ โควินท์ทวีวัฒน์, "การใช้ทาร์เก็ตสองมิติแบบไม่สมมาตรในช่องสัญญาณการบันทึกบิตแพทเทิร์นมีเดียแบบ Staggered," การประชุมวิชาการทางวิศวกรรมไฟฟ้า ครั้งที่ 38, CM-181, หน้า 589-292, พระนครศรีอยุธยา, 18 - 20 พฤศจิกายน 2558   PDF
  31. S. Koonkarnkhai and P. Kovintavewat, "Study of fractionally-spaced equalizers for bit-patterned media recording," in Proc. of IEEE International Magnetics Conference 2015 (INTERMAG 2015), HQ-13, Beijing, China, May 11-15, 2015. 
                                                                                  2014
  32. S. Koonkarnkhai, P. Kovintavewat, and P. Keeratiwintakorn, "A simple method to detect and correct an insertion/deletion error for bit-patterned media recording," in Proc. of The 29-th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2014), July 1-4, 2014, Phuket, Thailand.
                                                                                  2013
  33. P. Kovintavewat and S. Koonkarnkhai, "An improved iterative TA suppression method for coded perpendicular magnetic recording channels," in Proc. of The 5-th International Science, Social Science, Engineering and Energy Conference (ISEEC 2013), December 18-20, 2013, Kanchanaburi, Thailand.
  34. P. Kovintavewat and S. Koonkarnkhai, "A baseline popping detection and correction algorithm for perpendicular magnetic recording system," in Proc. of The 5-th International Science, Social Science, Engineering and Energy Conference (ISEEC 2013), December 18-20, 2013, Kanchanaburi, Thailand.
  35. S. Koonkarnkhai, P. Kovintavewat, and P. Keeratiwintakorn, "Trellis-based detecting insertion and deletion of bits for bit-patterned media recording," in Proc. of The 5-th International Science, Social Science, Engineering and Energy Conference (ISEEC 2013), December 18-20, 2013, Kanchanaburi, Thailand.
  36. S. Koonkarnkhai, P. Kovintavewat, and P. Keeratiwintakorn, "Iterative decoding with insertion and deletion errors for bit-patterned media recording channels," in Proc. of The 28-th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2013), Yeosu, Korea, June 30–July 3, 2013.
  37. S. Koonkarnkhai et al. "A simple Baseline popping detection and correction for perpendicular magnetic recording channels," in Proc. of The 28-th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2013), Yeosu, Korea, June 30 –July 3, 2013.
  38. P. Kovintavewat, S. Koonkarnkhai, and A. Suvichakorn, "Head instability detection for testing process in perpendicular magnetic recording system," in Proc. of The International conference on Applied Physics and Material Applications (ICAPMA 2013), Petchaburi, Thailand, Feb 20-22, 2013.
                                                                                  2012
  39. S. Koonkarnkhai, C. Warisarn, and P. Kovintavewat, "Iterative decoding for bit-patterned media recording in insertion/deletion errors," in Proc. of The 4-th International Science Social-Science Conference (ISEEC 2012), Cha-Am, Petchburi, Thailand, December 11–14, 2012.
                                                                                  2011
  40. S. Koonkarnkhai, N. Chirdchoo and P. Kovintavewat, "Iterative decoding for high-density bit-patterned media recording," in Proc. of The 3-rd International Science Social-Science Conference 2011, Nakhon Patathom, Thailand, December 15-18, 2011.
  41. S. Koonkarnkhai, P. Keeratiwintakorn, N. Chirdchoo, and P. Kovintavewat, "Two-dimensional cross-track asymmetric target for high-density bit-patterned media recording," in Proc. of The 19-th International Symposium on Intelligent Signal Processing and Communication Systems 2011, Chiangmai, Thailand, December 7-9, 2011.
                                                                                  2010
  42. ธีระชาติ ทองคำ, สันติ กูลการขาย, ปิยะ โควินท์ทวีวัฒน์ และ พรชัย ทรัพย์นิธิ, "ประสิทธิภาพของการทำงานร่วมกันระหว่างการกำจัดความขรุขระทางความร้อนและอีควอไลเซชันแบบเทอร์โบในช่องสัญญาณการบันทึกเชิงแม่เหล็กแบบแนวตั้ง," การประชุมวิชาการทางวิศวกรรมไฟฟ้า ครั้งที่ 33, เชียงใหม่, 1-3 ธันวาคม 2553, CM 045,หน้า 1025-1028.
  43. S. Koonkarnkhai, C. Tuntibundhit, and P. Kovintavewat, "A TA suppression method based on wavelet packet for perpendicular recording channels," in Proc. of The 25-th International Technical Conference on Circuit/System, Computers and Communications (ITC-CSCC) 2010, Pattaya, Thailand, July 4-7, 2010.
  44. T. Thongkam, S. Koonkarnkhai, P. Kovintavewat, and P. Supnithi, "Investigation of iterative TA suppression method in perpendicular recording system," in Proc. of The 3-rd Data Storage Technology Conference 2010, BITEC, Bangkok, Thailand, July 30 - August 1, 2010.
  45. P. Kovintavewat and S. Koonkarnkhai, "Joint TA supression and turbo equalization for coded partial response channels," in Proc. of The 11-th Joint Magnetism and Magnetic Materials - INTERMAG Conference, Washington, DC, USA, GH-03, January 18-22, 2010.
                                                                                  2009
  46. P. Kovintavewat, C. Tuntibundhit, S. Koonkarnkhai, et al., "A TA suppression method based on wavelet transform for perpendicular recording channels," in Proc. of The 24-th International Technical Conference on Circuit/System, Computers and Communications (ITC-CSCC) 2009, Jeju Island, Korea, pp. 1511 - 1514, July 5-8, 2009.
  47. P. Kovintavewat and S. Koonkarnkhai, "A new thermal asperity detection and correction algorithm for perpendicular recording channels," in Proc. of The Data Storage Technology Conference 2009, DST-117, Thailand Science Park Convention Center, Bangkok, Thailand, May 13-15,2009. (The best paper award)
  48. S. Koonkarnkhai, P. Kovintavewat, and P. Keeratiwintakorn, "The effect of bandpass filters for thermal asperity suppression in perpendicular recording systems," in Proc. of The 6-th ECTI-CON 2009, Pattaya, Thailand, vol. 2, pp.1022-1025 May 6-9, 2009.
  49. P. Kovintavewat, S. Koonkarnkhai, et al.,"A novel thermal asperity suppression for perpendicular recording channels," in Proc. of The IEEE International Conference on Magnetics (INTERMAG 2009), Sacramento, California, USA, BP-06, May 4-8, 2009.
                                                                                  2008
  50. P. Kovintavewat and S. Koonkarnkhai, "Thermal asperity suppression based on least squares fitting in perpendicular magnetic recording systems," in Proc. of The 53-rd Annual Conference on Magnetism and Magnetic Materials, Austin, Texas, USA, pp. 211 – 212, November 10 -14, 2008.
  51. สันติ กูลการขาย และ ปิยะ โควินท์ทวีวัฒน์, "การระงับความขรุขระเชิงความร้อนแบบที่ถูกปรับปรุงในช่องสัญญาณการบันทึกแบบการบันทึกแบบแนวตั้ง," การประชุมวิชาการทางวิศวกรรมไฟฟ้า ครั้งที่ 31, นครนายก, 29-31 ตุลาคม 2551, ฉบับที่ 2, CM-05, หน้า 665-668.