复旦大学数字信号处理与传输实验室的林思婕同学论文"Active Sampling For Approximately Bandlimited Graph Signals"被IEEE International Conference on Acoustics, Speech, and Signal Processing(ICASSP) 2019录用。
论文摘要：This paper investigates the active sampling for estimation of approximately bandlimited graph signals. With the assistance of a graph filter, an approximately bandlimited graph signal can be formulated by a Gaussian random field over the graph. In contrast to offline sampling set design methods which usually rely on accurate prior knowledge about the model, unknown parameters in signal and noise distribution are allowed in the proposed active sampling algorithm. The active sampling process is divided into two alternating stages: unknown parameters are first estimated by Expectation Maximization (EM), with which the next node to sample is selected based on historical observations according to predictive uncertainty. Validated by simulations compared with related approaches, the proposed algorithm can reduce the sample size to reach a certain estimation accuracy.
论文作者：Sijie Lin, Xuan Xie, Hui Feng, Bo Hu