This paper proposes a channel estimation technique for the dynamic parameter controlled — orthogonal frequency and time division multiple access (DPC-OF/TDMA) systems studied as one of the candidates of the beyond third generation (B3G) systems. In the proposed scheme, the impulse response, which represents the channel state information (CSI) is estimated using carrier interferometry (CI) which...

The rapid variation of wireless channels and feedback delay make the available channel state information (CSI) outdated in dynamic wireless multi-hop networks, which significantly degrades the accuracy of cross-layer resource allocation. To deal with this problem, a cross-layer resource allocation scheme is proposed for wireless multi-hop networks by taking the outdated CSI into account and bas...

Children with autism spectrum disorder often demonstrate unusual behavioral responses to sensory stimuli (i.e., sensory features). To manage everyday activities, caregivers may implement strategies to address these features during family routines. However, investigation of specific strategies used by caregivers is limited by the lack of empirically developed measures. In this study, we describe...

Adaptive resource allocation can drastically increase the throughput of an Orthogonal Frequency Division Multiple Access (OFDMA) system when the Channel State Information (CSI) is accurately known. Unfortunately, in practice, perfect CSI is rarely possible. In this paper, we consider adaptive subcarrier assignment for downlink multiuser OFDMA systems, where the transmitter has no knowledge of t...

In this paper we address the design of a multiple transmit antenna system in which the Channel State Information (CSI) at the transmitter is not perfect. Two different approaches are analyzed: one based on the Minimization of the Mean Square Error (MMSE) and the other based on the application of the Maximum Likelihood Sequence Estimation (MLSE). In both cases a Bayesian criterion is used in ord...

Antenna selection provides a low-cost low complexity solution for MIMO systems, in particular transmit antenna selection exploits partial knowledge of the channel that can be made available without excessive feedback bandwidth. In this work we explore information theoretic limits of transmit antenna selection for high SNR and large number of transmit antennas. We define the capacity gain as the...

This paper presents a brief overview of spacetime algorithms for communication systems operating in quasi-static Rayleigh flat fading environments. The space-time algorithms exploit a multi-input multi-output (MIMO) channel and are designed to meet criteria for optimality under three different channel state information (CSI) conditions: 1) CSI at receiver and transmitter, 2) CSI at receiver but...

Two of a number of hypotheses loosely referred to as the CSI Effect suggest that the television program and its spin-offs, which wildly exaggerate and glorify forensic science, affect the public, and in turn affect trials either by (a) burdening the prosecution by creating greater expectations about forensic science than can be delivered or (b) burdening the defense by creating exaggerated fait...

We investigate the ergodic sum rate and required transmit power of a single-cell massive multiple-input multiple-output (MIMO) downlink system. The system considered in this paper is based on two linear beamforming schemes, that is, maximum ratio transmission (MRT) beamforming and zero-forcing (ZF) beamforming. What’s more, we use minimum mean square error (MMSE) channel estimation to get imper...

In the last years a lot of works dealt with MultipleAntenna systems starting from the seminal work in [1]. This technology allows to obtain very low bit error rate requiring, at the same time, low SNR. A lot of papers make reference to two opposite situations in which consider a perfectly channel state information (CSI) and no channel state information. In this contribution, by utilizing a wate...