IEEE

Curve Fitting Based Piecewise Nonlinear Companding Scheme for PAPR Reduction in OFDM Systems

Abstract: Peak-to-average power ratio (PAPR) is an important issue for orthogonal frequency division multiplexing (OFDM) systems. In this letter, we derive a new piecewise nonlinear companding scheme ...
IEEE

Switching Control Strategy for DC–DC Converters Based on Polynomial Lyapunov Function and Sum-of-Squares Approach

Abstract: The introduction of switched system theory opens new perspectives for the control design of dc/dc converters. Regarding the classical two-level converters, two switching control design ...
The Hechinger Report

Faster solutions, lower test scores: How AI is eroding math skills

Many students appear to be completing assignments faster while learning less from them. This conclusion comes from one of the largest studies of how generative AI is changing student behavior and ...
CNN

Iran’s ‘accidental’ president has survived the war. Peace may be a tougher challenge

When Iranian officials convened in Tehran to discuss the nation’s water crisis this month, President Masoud Pezeshkian asked them to remove their blazers to cope with the sweltering heat instead of ...
The Earth Institute Columbia University

Vineet Goyal

I am Professor in the Industrial Engineering and Operations Research department at Columbia University. I received my PhD in Algorithms, Combinatorics and Optimization (ACO) in 2008 from Tepper School ...