Stephen E. Ralph

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—In this paper, we present integrated circuit solutions that enable high-speed data transmission over legacy systems such as short reach optics and electrical backplanes. These circuits compensate for the most critical signal impairments, intersymbol interference and crosstalk. The finite impulse response (FIR) filter is the cornerstone of our architecture,(More)
This is dedicated to my family and everyone else who helped me along my way just so they could see me succeed. This is also dedicated to the innocent students and faculty who lost their lives at Virginia Tech on April 16, 2007 doing what I am doing now: pursuing a higher education. iv ACKNOWLEDGEMENTS I would like to thank Dr. Ali Adibi for being my(More)
We report the direct measurement of the intrinsic photocurrent response of both top and back illuminated planar metal–semiconductor–metal structures. We directly observe the temporal dynamics of the hole transport dependence on applied bias and the initial spatial distribution using a near infrared tunable femtosecond light source and electrically biased(More)
We propose a new architecture for coherent intradyne optical receivers that autonomously identifies and decodes OOK, BPSK, QPSK, and 16-QAM modulation formats. The architecture robustly determines the total accumulated chromatic dispersion, the symbol rate that is not tightly constrained, the number of distinct modulated polarizations, and the modulation(More)
Tech. He received his BEE degree in Electrical Engineering with highest honors from the Georgia Institute of Technology in 1980 and his Ph.D. in Electrical Engineering from Cornell University in 1988 for his work on highly nonequilibrium carrier transport in semiconductor devices. He is currently the director of the Georgia Electronic Design Center, a(More)
Wiener filter is widely used to equalize the signals over inter-symbol interference (ISI) channels because of its low complexity and optimality in terms of mean square error (MSE). However, Wiener filter is generally not optimal in terms of symbol detection error and thus can exhibit considerable error performance degradation in ISI channels. Recently, to(More)