Xiujie Huang

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Non-controllable finite-state channels (FSCs) are finite-state channels in which the user cannot control the channel state, i.e., the state evolves freely in time. Thus far, good upper bounds on the capacities as well as computable capacities of general non-controllable FSCs with/without feedback are unknown. Here we consider the delayed channel state as(More)
A new problem formulation is presented for the Gaussian interference channels (GIFC) with two pairs of users, which are distinguished as primary users and secondary users, respectively. The primary users employ a pair of encoder and decoder that were originally designed to satisfy a given error performance requirement under the assumption that no(More)
Feature coding and pooling as a key component of image retrieval have been widely studied over the past several years. Recently sparse coding with max-pooling is regarded as the state-of-the-art for image classification. However there is no comprehensive study concerning the application of sparse coding for image retrieval. In this paper, we first analyze(More)
In this paper, we present a general formula for the capacity region of a general interference channel with two pairs of users. The formula shows that the capacity region is the union of a family of rectangles, where each rectangle is determined by a pair of spectral inf-mutual information rates. Although the presented formula is usually difficult to(More)