EUISEOK HWANG

 

PhD Candidate, Electrical and Computer Engineering, Carnegie Mellon University,
5000 Forbes Avenue, Pittsburgh, PA 15213-3890

euiseokh at cmu dot edu, http://www.ece.cmu.edu/~euiseokh, (o) 412-268-4253, (f) 412-268-6345

 

Education:

·         07/2007 - (05/2011): Ph.D., Electrical and Computer Engineering, Carnegie Mellon University

·         08/2006 - 07/2007: M.S., Electrical and Computer Engineering, Carnegie Mellon University

·         03/1998 - 02/2000: M.S., Mechanical Design and Production Engineering, Seoul National University

·         03/1998 - 02/2000: B.S., Nuclear Engineering, Seoul National University

 

Professional Experience:

·         08/2006 - (08/2011): Research Assistant, Data Storage Systems Center, Carnegie Mellon University

°         Research on channels with write errors and channel coding with side information at the encoder

°         Research/design on coding and signal processing for radiation-tolerant memory systems

°         Research/design on channel modeling, coding, and detection for two-dimensional magnetic recording (TDMR) systems

°         Design of advanced timing recovery methods based on extended Kalman filter (EKF) algorithm

·         01/2006 - 07/2006: Chief Research Engineer, Digital Media R&D Center, Daewoo Electronics Corporation

°         Development of high data rate channel electronics for holographic data storage system (HDSS)

·         01/2002 - 12/2005: Senior Research Engineer, Digital Media R&D Center, Daewoo Electronics Corporation 

°         Hardware implementation (FPGA) of coding and detection for HDSS demonstration system

°         Research/design on read channel signal processing for HDSS using photopolymer disk

·         02/2000 - 12/2001: Research Engineer, Digital Media R&D Center, Daewoo Electronics Corporation

°         Research/design on coding and signal processing for page of memory (POM)

·         03/1998 - 02/2000: Research Assistant, Institute of Advanced Machinery and Design, Seoul National University

°         Research on array signal processing for acoustic noise source identification and sound field reconstruction based on near-field acoustical holography (NAH)

 

Areas of Interest:

·         Advanced technologies in coding and detection for next generation data storage and memory systems

·         Error control coding (ECC) and read channel signal processing for ultra-high density and transfer rate magnetic recording systems

 

Selected Recent Publications:

·         E. Hwang, R. Negi and B.V.K. Vijaya Kumar, “Symmetric information rate of an ideal readback two-dimensional magnetic recording (TDMR) channel with random Voronoi grains,” presented at IEEE Int. Conf. Commun. (ICC), 2010. [link]

·         E. Hwang, R. Negi, and B.V.K. Vijaya Kumar, “Signal processing for near 10 Tbit/in2 density in two-dimensional magnetic recording (TDMR),” IEEE Trans. Magn., vol. 46, no. 6, pp. 1813-1816, 2010. [link]

·         E. Hwang, R. Negi, B.V.K. Vijaya Kumar, and R. Wood, “Investigation of position and timing uncertainty in two-dimensional magnetic recording (TDMR) at 4 Terabits per square inch,” invited at 9th Perp. Mag. Rec. Conf., 2010.

·         S. Jeon, E. Hwang, B. V. K. Vijaya Kumar, and M. K. Cheng, “LDPC codes for memory systems with scrubbing,” to be presented at IEEE Global Telecomm. Conf. (Globecom), 2010.

·         E. Hwang, R. Negi, and B.V.K. Vijaya Kumar, “Extended Kalman filter based acquisition timing recovery for magnetic recording read channels,” presented at IEEE Int. Conf. Commun. (ICC), 2008. [link]

 

Complete List of Publications:

Refereed Journal Papers:

1.      E. Hwang, R. Negi, and B.V.K. Vijaya Kumar, “Signal processing for near 10 Tbit/in2 density in two-dimensional magnetic recording (TDMR),” IEEE Trans. Magn., vol. 46, no. 6, pp. 1813-1816, 2010. [link]

2.      K. S. Chan, J. J. Miles, E. Hwang, W. Lin, R. Negi, B. V. K. Vijaya Kumar, and J. G. Zhu, “TDMR platform simulations and experiments,” IEEE Trans. Magn., vol. 45, no. 10, pp. 3837-3843, 2009. [link]

3.      Y. Kang and E. Hwang, “Beamforming-based partial field decomposition in NAH,” J. Sound Vib., vol. 314, no. 3-5, pp. 867-884, 2008. [link]

4.      B. Chung, P. Yoon, H. Kim, J. Park, J. Park, and E. Hwang, “A Modified Low-Density Parity-Check Decoder for Holographic Data Storage System,” Jpn. J. Appl. Phys., vol. 46, pp. 3812-3815, 2007. [link]

5.      E. Hwang, P. Yoon, H. Kim, J. Park, J. Park, and Y. Kang, “Channel Data Retrieval in Page Based Holographic Data Storage,” Jap. J. App. Phy., vol. 45, pp. 1285-1287, 2006. [link]

6.      E. Hwang, P. Yoon, H. Kim, and J. Park, “Hardware Channel Decoder for Holographic WORM Storage,” Trans. Soc. Information Storage Sys., vol. 1, no. 2, pp. 155-160, 2005.

7.      E. Hwang, P. Yoon, J. Park, J. Park, and H. Nam, “Three-dimensional error correction schemes for holographic data storage,” Jap. J. App. Phy., vol. 44, pp. 3529-3533, 2005. [link]

8.      E. Hwang, J. Roh, , J. Kim, J. Cho, J. Park, and H. Jung, “A new two-dimensional pseudo-random modulation code for holographic data storage,” Jap. J. App. Phy., vol. 42, pp. 1010-1013, 2003. [link]

9.      E. Hwang, K. Kim, J. Kim, J. Park, and H. Jung, “A new efficient error correctible modulation code for holographic data storage,” Jap. J. App. Phy., vol. 41, pp. 1763-1766, 2002. [link]

10.  E. Hwang, Y. Cho, and Y. Kang, “Beamforming based partial field decomposition in Acoustical Holography,” J. Kor. Soc. Noise Vib. Eng., vol. 11, no.6, pp. 200-207, 2001.

 

Conference Abstracts and Papers:

1.      E. Hwang, S. Jeon, R. Negi, B. V. K. Vijaya Kumar, and M. K. Cheng, “Scrubbing with partial side information for radiation-tolerant memory,” invited at IEEE Global Telecomm. Conf. (Globecom) Workshop, 2010.

2.      S. Jeon, E. Hwang, B. V. K. Vijaya Kumar, and M. K. Cheng, “LDPC codes for memory systems with scrubbing,” to be presented at IEEE Global Telecomm. Conf. (Globecom), 2010.

3.      S. Jeon, E. Hwang, B. V. K. Vijaya Kumar, and M. K. Cheng, “A Multibit-Per-Cell Memory Model and Nonbinary LDPC Codes,” to be presented at IEEE Global Telecomm. Conf. (Globecom) Workshop, 2010.

4.      E. Hwang, R. Negi, and B.V.K. Vijaya Kumar, “Symmetric information rate of an ideal readback two-dimensional magnetic recording (TDMR) channel with random Voronoi grains,” presented at IEEE Int. Conf. Commun. (ICC), 2010. [link]

5.      E. Hwang, R. Negi, B.V.K. Vijaya Kumar, and R. Wood, “Investigation of position and timing uncertainty in two-dimensional magnetic recording (TDMR) at 4 Terabits per square inch,” invited at 9th Perp. Mag. Rec. Conf. (PMRC), 2010.

6.      E. Hwang, R. Negi, and B.V.K. Vijaya Kumar, “Signal processing for near 10 Tbit/in2 density in two-dimensional magnetic recording (TDMR),” presented at Joint Magn. Magn. Mat. (MMM) IEEE Int. Magn. Conf. (Intermag), 2010.

7.      S. Jeon, B.V.K. Vijaya Kumar, E. Hwang, and M. K. Cheng, “Evaluation of Error-Correcting Codes for Radiation-Tolerant Memory,” The Interplanetary Network Progress Report, National Aeronautics and Space Administration, Jet Propulsion Laboratory (NASA JPL), vol. 42-181, pp. 1-18, 2010. [link]

8.      S. Jeon, E. Hwang, B. V. K. Vijaya Kumar, and M. K. Cheng, “Investigation of memory protection using low-density parity-check (LDPC) codes,” presented at IEEE Non-Volatile Mem. Tech. Symp. (NVMTS), 2009.

9.      K. S. Chan, J. J. Miles, E. Hwang, W. Lin, R. Negi, B. V. K. Vijaya Kumar, and J. G. Zhu, “TDMR platform simulations and experiments,” presented at IEEE Int. Magn. Conf. (Intermag), 2009.

10.  E. Hwang, R. Negi, and B.V.K. Vijaya Kumar, “Extended Kalman filter based acquisition timing recovery for magnetic recording read channels,” presented at IEEE Int. Conf. Commun. (ICC), 2008. [link]

11.  E. Hwang, P. Yoon, N. Kim, B. Kang, K. Kim, J. Park, and J. Park, “Real-time video demonstration of holographic disk data storage system,” Proc. of SPIE, vol. 6282, 628205, 2006. [link]

12.  B. Chung, E. Hwang, P. Yoon, H. Kim, J. Park, and J. Park, “A modified LDPC decoder compensating pixel misalignment in holographic data storage system,” presented at Int. Symp. Opt. Mem. (ISOM), 2006.

13.  P. Yoon, E. Hwang, J. Moon, J. Park, J. Park, and G. Park “Channel modeling and system optimization for holographic disk storage,” presented at Int. Symp. Opt. Mem. (ISOM), 2006.

14.  E. Hwang, P. Yoon, N. Kim, B. Kang, K. Kim, J. Park, and J. Park, “Real-time video demonstration of holographic disk data storage system,” presented at Optical Data Storage (ODS), 2006. [link]

15.  E. Hwang, P. Yoon, H. Kim, J. Park, J. Park, and Y. Kang, “Hardware channel decoder for holographic data storage,” presented at Joint Optical Data Storage (ODS) Int. Symp. Opt. Mem. (ISOM), 2005.

16.  E. Hwang, J. Sun, and Y. Kang, “Beamforming-based Partial Field Decomposition in NAH,” presented at Noise Control Eng. Conf. (Noise-Con), 2005.

17.  E. Hwang, P. Yoon, N. Kim, K. Kim, J. Cho, and J. Park, “Real-time Video Demonstration of Holographic Disk Data Storage System,” invited at Photonics Conf., 2005.

18.  E. Hwang, P. Yoon, H. Kim, and J. Park, “Hardware channel decoder for holographic WORM system,” presented at Soc. Information Storage Sys. Conf., 2005.

19.  E. Hwang, P. Yoon, K. Kim, J. Park, and J. Lee, “Iterative volumetric ECC schemes for holographic data storage,” Proc. of SPIE, vol. 5380, 304, 2004. [link]

20.  E. Hwang, P. Yoon, and J. Park, “An efficient 3D error correction schemes for holographic data storage,” presented at Int. Symp. Opt. Mem. (ISOM), 2004.

21.   P. Yoon, E. Hwang, B. Kang, J. Park, and G. Park, “Image compensation for sub-pixel misalignment in holographic data storage,” presented at Int. Symp. Opt. Mem. (ISOM), 2004.

22.  E. Hwang, P. Yoon, K. Kim, J. Park, and J. Lee, “Iterative volumetric ECC schemes for Holographic data storage,” presented at Optical Data Storage (ODS), 2004.

23.  E. Hwang, J. Roh, K. Kim, B. Kang, J. Park, and H. Jung, “Code-word complementing block modulation code for holographic data storage,” presented at Joint Optical Data Storage (ODS) Int. Symp. Opt. Mem. (ISOM), 2002. [link]

24.  K. Kim, B. Kang, E. Hwang, J. Cho, J. Rho, and J. Park, “Daewoo’s holographic digital data storage,” presented at Opt. Soc. Kor. Conf., 2002.

25.  E. Hwang, K. Kim, J. Kim, J. Park, and H. Jung, “9:12 pseudo-balanced code for holographic data storage,” presented at Int. Symp. Opt. Mem. (ISOM), 2001.

26.  J. Park, E. Hwang, and J. Cho, “Modulation codes for holographic digital data storage,” invited at Opt. Soc. Kor. Conf., 2001.

27.  E. Hwang, B. Kang, J. Cho, J. Park, and H. Jung, “Channel modeling and spectral domain evaluations for holographic data storage,” presented at Satellite Int. Symp. Opt. Mem. (ISOM), 2000.

28.  K. Kim, E. Hwang, J. Roh, J. Park, and H. Jung, “Dual constant weights code for holographic data storage,” presented at Satellite Int. Symp. Opt. Mem. (ISOM), 2000.

29.  E. Hwang, Y. Cho, and Y. Kang, “Beamforming based partial field decomposition in Acoustical Holography,” presented at Kor. Soc. Noise Vib. Eng. Conf., 2001.

 

M.S. Thesis:

E. Hwang, Y. Cho, and Y. Kang, “Partial field decomposition in NAH,” Dept. of Mech. Design Prod. Eng., Seoul National University (2000).

 

Issued Patents:

1.      E. Hwang, “Method and apparatus for compressing holographic data,” US Patent 7391911 (also published as China Patent 1578160, and European Patent 1494222). [link]

2.      J. Roh and E. Hwang “High code rate block coding/decoding method and apparatus,” US Patent 7055080 (also published as China Patent 1407727, Japanese Patent 2003-087123, and UK Patent GB2386487). [link]

3.      E. Hwang, “Method and apparatus for modifying page data,” US Patent 6895114 (also published as China Patent 1407508, Japanese Patent 2003-076256, and UK Patent GB2380347). [link]

4.      E. Hwang, “Error correctible channel coding method,” US Patent 6711711 (also published as Japanese Patent 2002-314433). [link]

5.      J. Roh, K. Kim, and E. Hwang, “N:N+1 channel coding method and apparatus therefore,” US Patent 6346897 (also published as Japanese Patent 2002-43948). [link]

6.      E. Hwang, “Three-dimensional error correction method,” European Patent 1545012 (also published as China Patent 1630203, Japanese Patent 2005-184780, and US Patent Application 10959097). [link] 

7.      H. Kim, P. Yoon, and E. Hwang, “Optical information reproducing apparatus and optical information reproducing method using the same,” European Patent 1843333 (also published as US Patent Application 11486434). [link]

8.      P. Yoon, H. Kim, and E. Hwang, “Detecting method for Holographic DVD by discriminating and correcting invalid oversampled pixels according to their spatial illumination distribution,” European Patent 1830358. [link]

 

25 Registered Korean Patents on http://www.ece.cmu.edu/~euiseokh/krpatents.htm