Optimizing Quantization for Lasso Recovery.

Autor: Xiaoyi Gu, Shenyinying Tu, Hao-Jun Michael Shi, Case, Mindy, Needell, Deanna, Plan, Yaniv
Předmět:
Zdroj: IEEE Signal Processing Letters; Jan2018, Vol. 25 Issue 1, p45-49, 5p
Abstrakt: This letter is focused on quantized compressed sensing, assuming that Lasso is used for signal estimation. Leveraging recent work, we propose a constrained Lloyd-Max-like framework to optimize the quantization function in this setting, and show that when the number of observations is high, this method of quantization gives a significantly better recovery rate than standard Lloyd-Max quantization. We support our theoretical analysis with numerical simulations. [ABSTRACT FROM PUBLISHER]
Databáze: Complementary Index