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This paper studies a Dantzig-selector type regularized estimator for linear functionals of high-dimensional linear processes. Explicit rates of convergence of the proposed estimator are obtained and they cover the broad regime from independent identically distributed samples to long-range dependent time series and from sub-Gaussian innovations to those with mild polynomial moments. It is shown that...
In this work, we consider a multiuser communication system in fading channels where the transmitter is supplied by hybrid energy sources including power grid and various renewable sources. Specially, the energy harvested from various renewable sources is stored in a limited capacity buffer, and the joint energy incoming is time-varying and possibly unpredictable. In addition, data arrives randomly...
Recently, the variable channel-width (VW) scheme was proposed to improve the performance of WLANs. Cooperative channel allocation has been studied in some existing literature under the assumption that the traffic demands of cooperative access points (APs) are constant. In fact, the traffic demands may vary when the corresponding stations change their AP association decisions. Hence, this work jointly...
This paper studies the resource allocation problem for spectrum-sharing femtocell networks. An auction-based algorithm, VCG auction, is proposed to ensure femtocell users submit their utilities truthfully despite the selfish nature of them, so that the resource allocation scheme works efficiently and fairly. We investigate the uplink transmission in a sparsely deployed scenario of Femto-network. By...
Femtocell networks embedded in the macrocell greatly benefit capacity gain from high SINR and dedicated BS to home subscribers. However, the lack of schemes to effectively control the interference and fully utilize radio resources creates challenges to practically facilitate the additive unlicensed spectrum in femtocells. To tackle these challenges, this paper presents a solution to the interference...
In this paper, resource allocation for mixed traffic in wireless access networks is investigated and a utility-based resource dynamic allocation (URDA) algorithm is proposed. This algorithm considers the QoS characteristics, real-time resource requirements and wireless channel states that belong to different types of applications, and then generates utility functions of them. The resource is allocated...
In wireless personal area networks (WPANs), a successful design of scheduling scheme is critical for video traffic in QoS guarantee and efficient channel resource utilization. In this paper, we propose a novel cross-layer scheduling scheme for MPEG traffic in high speed WPANs. The scheme aims at introducing robust improvements to MPEG traffic scheduling by taking most advantages of traffic characteristic...
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