Abstract
Conference Title: 2017 IEEE Global Conference on Signal and Information Processing (GlobalSIP) Conference Start Date: 2017, Nov. 14 Conference End Date: 2017, Nov. 16 Conference Location: Montreal, QC, Canada In this paper, we consider the problem of recovering an unknown sparse signal x 0 G Rn from noisy linear measurements y = Hx 0 +z G Rm. A popular approach is to solve the ¿4-norm regularized least squares problem which is known as the LASSO. In many practical situations, the measurement matrix H is not perfectely known and we only have a noisy version of it. We assume that the entries of the measurement matrix H and of the noise vector z are iid Gaussian with zero mean and variances 1 /n and σ2 z . In this work, an imperfect measurement matrix is considered under which we precisely characterize the limilting behavior of the mean squared error and the probability of support recovery of the LASSO. The analysis is performed when the problem dimensions grow simultaneously to infinity at fixed rates. Numerical simulations validate the theoretical predictions derived in this paper.