Academic Experience
- Assistant Professor, 11/2002-present
Electrical and Computer
Engineering, Lehigh University,
Bethlehem, PA
Teaching and research on telecommunications, coding and information
theory and signal processing
- Research Assistant/Teaching Assisitant, 01/1999-10/2002
Department of Electrical Engineering,
TAMU,
College Station, TX
Teaching and research on advanced error correction coding and modulation techniques
for wireless/wireline/optical fiber communications and data storage systems.
- Research focusing on low-complexity, high-performance,
bandwidth-efficient codes
and modulations, including turbo codes, LDPC codes, turbo product codes, product accumulate codes,
multi-level coding and multi-stage decoding, turbo/trellis coded modulation and continuous phase modulation.
Research projects include code design and construction, decoding algorithm analysis and optimization,
analytical bounds and thresholds, and performance evaluation
for various applications in wireline, wireless and optical fiber communications as well as
data storage systems.
- Prepared and helped teach a comprehensive telecommunications lab
course that covers almost all aspects in a digital communication system.
(ELEN489 Digital telecommunications Lab:
http://ee.tamu.edu/~ee489).
Developed the website, graded the projects, and taught Q&A sessions.
- Graduate Assistant (Computer System Administrator),
05/1998-01/1999
Texas Transportation Institute, College
Station, TX
In charge of system administration work in the TTI Tanslink Computer Lab.
- Duties
includes user administration, system backup,
performance monitoring, webpage maintenance,
inventory and software license management and trouble shooting.
- Developed a program that can be scheduled to incrementally fetch data
from Internet (via anonymous ftp) and post on the web at certain time
of the day/week/month/year.
Industrial Experience
- Research Intern, 05/2001-08/2001
Tyco Telecommunications Laboratory,
Eatontown, NJ
Analysis and performance evaluation of forward error correction coding for optical fiber communications:
- Implemented and evaluated 2 different high-performance coding schemes of several rates and several block sizes over 3 symmetric/asymmetric optical fiber channel models with ASE; computed analytical bounds; examined error floors and proposed ways to lo
wer error floors; investigated the effect of different outer RS wraps.
- Wrote 1 comprehensive technical review, 2 conference papers and
several internal memos/reports.
- Research Intern, 05/2000-08/2000
Seagate Research Laboratories, Pittsburgh, PA
Design, optimization and analysis of various coding schemes for next generation data storage systems:
- Implemented 3 different high-performance coding schemes (iterative SISO decoding) over 4 types of PR channels and 3 types of Lorentzian channels employing turbo equalization.
- Performed analysis and performance evaluation on bit error rate, bit/byte error statistics, block failure rate, effect of precoding, convergence of iterative equalization and decoding, complexity, and error statistics modeling.
- Wrote 3 progress reports, 3 conference papers and 1 journal paper under preparation.
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Journal Papers
- J. Li, K. R. Narayanan, and C. N. Georghiades, "On the Performance, Bounds and Thresholds of Product Accumulate Codes
over Rayleigh Fading Channels," under preparation.
- J. Li,
"On the Achievable Information Rate of ASE_Dominant Long-Haul Optical
Fiber Communications," submitted to IEEE/OSA Jour. Lightwave
Tech.
- J. Li, K. R. Narayanan, and C. N.
Georghiades,
"An Efficient Algorithm to compute the Euclidean Distance Spectrum of a
General Inter-Symbol Interference Channnel and Its Applications,"
submitted to IEEE Trans. Commun.
- J. Li, K. R. Narayanan, and C. N. Georghiades,
"Product Accumulate Codes: A Class of Capacity-Approaching, Low-Complexity Codes,"
submitted to IEEE Trans. Inform. Theory.
- J. Li, K. R. Narayanan, E. Kurtas, and C. N. Georghiades, "On the Performance of High-rate Turbo Product Codes and LDPC Codes over Partial Response Channels,"
IEEE Trans. Commun., May, 2002.
- J. Li, E. Kurtas, K. R. Narayanan, and C. N. Georghiades, "On
the Performance of Turbo Product Codes over Partial Response
Channels," IEEE Trans. Magnetics, pp. 1932-1934, July, 2001.
Conference Papers
- J. Li, and E. Kurtas, "A Class of (rp^(r-1), p^r, p, r, {0,1})
Combinatorially Designed LDPC Codes with Applications to ISI Channels,"
Proc. IEEE Intl. Symp. Inform. Theory (ISIT), to appear, Yokohama,
Japan, June 2003.
- J. Li, "Combinatorial Design of LDPC Codes Using Zech Logarithms
and Congruential Sequences," Proc. Workshop on Coding, Cryptography and
Combinatorics (WCCC), to appear, Yellow Mountain City, China, June 2003.
- Y. Cai, J. Chen, J. Li, A. Pilipetskii, G. Lenner, A. Lucero,
and M. Nissov, " On Channel Models for Predicting Soft-Decision Error
Correction Performance in Optically Amplified Systems," Technical Digest
of Optical Fiber Conf. (OFC), Atlanta, March 2003.
- J. Li and K. R. Narayanan, "Rate-Compatible Low Density Parity
Check Codes for Capacity-Approaching ARQ Schemes in Packet Data
Communications," Proc. Intl. Conf. on Commun., Internet
and Inform. Tech. (CIIT), US Virgin Islands, pp. 201-206, Nov.
2002
- J. Li, E. Kurtas,
"A Class of High-Rate, Low-Complexity,
Well-Structured LDPC Codes from Combinatorial Designs and Their
Applications on ISI Channels," Proc. Intl. Conf. on
Commun., Internet and Inform. Tech. (CIIT), pp. 418-425,
US Virgin Islands, Nov. 2002
- K. R. Narayanan, J. Li, and C. N. Georghiades, "Product
Accumulate Codes for Fading Channels," invited paper,
Proc. Asilomar Conf.
Dec. 2002.
- J. Li, K. R. Narayanan, and C. N. Georghiades, "Computing the Euclidean Distance Spectrum of A General ISI
Channel," IEEE Commun. Theory Workshop (CTW), Florida, 2002.
- J. Li, K. R. Narayanan, and C. N. Georghiades, "Generalized Product Accumulate Codes: Analysis and Performance," Proc. IEEE Global Commun. Conf. (GLOBECOM), San Antonio, Nov. 2001.
- K. R. Narayanan, J. Li, and C. N. Georghiades, "Product
Accumulate Codes: Properties and Performance," Proc. IEEE
Inform. Theory Workshop (ITW), pp. 21-23, Cairns, Australia, Sept. 2001.
- J. Li, E. Kurtas, K. R. Narayanan, and C. N. Georghiades, "Iterative Decoding of Turbo Product Codes over PR-Equalized Lorentzian Channels with Colored Noise," Proc. IEEE Global Commun. Conf. (GLOBECOM), San Antonio, Nov. 2001.
- J. Li, and C. N. Georghiades, "An Efficient Decoding Algorithm for Cycle-free Convolutional Codes and Its Applications," Proc. IEEE Global Commun. Conf. (GLOBECOM), San Antonio, Nov. 2001.
- J. Li, K. R. Narayanan, and C. N. Georghiades, "A Class of Linear-Complexity, Soft-Decodable, High-Rate, `Good' Codes: Construction, Properties and Performance," in Proc. IEEE Intl. Symp. Inform. Theory (ISIT), pp. 122-122, Washington D.
C, June, 2001.
- J. Li, K. R. Narayanan, C. N. Georghiades, and E. Kurtas, "Thresholds for Iterative Equalization of Partial Response Channels Using Density Evolution," in Proc. IEEE Intl. Symp. Inform. Theory (ISIT), pp. 73-73, Washington D.C, June, 200
1.
- J. Li, E. Kurtas, K. R. Narayanan, and C. N. Georghiades, "On the Performance of Turbo Product Codes and LDPC Codes over Partial-Response Channels," in Proc. IEEE Intl. Conf. Commun. (ICC), vol. 7, pp. 2176-2183, Helsinki, Finland, June,
2001.
- J. Li, E. Kurtas, K. R. Narayanan, and C. N. Georghiades, "On the Performance of Turbo Product Codes over Partial Response Channels," presented in 8th Joint Conf. on Magnetism & Magnetic Materials and Intl. Magnetics Conf. (MMM-InterMag) Con
f., San Antonio, Jan. 2001.
- K. R. Narayanan, and J. Li, "Bandwidth Efficient Low Density Parity Check Coding using Multi Level Coding and Iterative Multi Stage Decoding," in Proc. 2nd Turbo Symp. On Turbo Codes and Related Topics, pp. 165-168, France, Sept. 2000.
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