Speaker: Hang Zhang, Ph.D. Student, Georgia Institute of Technology

Title:
Recovery of Sign Vectors in Quadratic Compressed Sensing

Abstract:

In certain applications, recovering the signs of values may be more critical than the values themselves. Inspired by advances of sparse recovery of signals with fewer measurements, we would like to study the sign recovery problem and generalize it from a linear case to a non-linear setup. We focus on the sign values in quadratic measurement systems and provide theorems for the consistency condition, which ensures the signs are recovered correctly with probability close to 1. In deriving the consistency condition, we adopt a new penalty term using the trace operation and transform the optimization problem to the widely known Lasso problem. We also present simulation results to verify the correctness of our theorems.

Speakers Bio:
Hang Zhang is a fourth year Ph.D. student working with Prof Faramarz Fekri with research focus on applying sparse recovery to miRNA sensing problem in biological signal processing. Before coming to Georgia Tech, he obtained his bachelor’s degree from Peking University, with a major degree in Electronics and Information Technology and Science and a minor degree in applied mathematics.