The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Interference cancellation (IC) has been proposed to improve bandwidth utilization for the majority of modern wireless networks. We claim that the conventional model for IC residual error, which is that the residual error power is simply a fraction of the power of the packet being cancelled, is overly simplified. In this paper, we evaluate the practical residual error of IC with spread MSK modulation...
In this paper, we propose a complete data-aided (DA) synchronization algorithm for minimum-shift keying (MSK) transmission, which addresses features of the transmit-only Wireless Sensor Network (WSN). To provide reliable packet detection even under a packet overlapping scenario, our frame synchronization metric is based on a pseudo-random (PN) sequence preamble and keeps a constant low false alarm...
We propose a new approach for the uplink in a one-hop multi-gateway wireless packet network. In principle, the proposed technique applies to many types of low-power transmitters, including wireless sensors and RFID tags, both active and passive. Only when requested, each gateway node (or listener) forwards the compressed physical layer samples of packets to a server, which decodes the packets using...
An energy efficient synchronization method is presented for an OFDM-based Time Division Cooperative Transmission (TDCT) system for the purpose of range extension. The proposed algorithm operates on a novel preamble consisting of two OFDM symbols. In TDCT, copies of the packet are transmitted through different time slots. Exploiting dependence between the synchronization parameters of the different...
In this paper, we investigate the packet decoding performance degradation due to the joint effects of synchronization and channel estimation errors in orthogonal frequency division multiplexing (OFDM)-based time-division cooperating transmission (TDCT) for the purpose of range extension. The signal to interference and noise ratio (SINR) of maximal ratio combining (MRC) with OFDM TDCT is analyzed in...
Multi-hop or cascaded distributed multi-input and multi-output (DMIMO) occurs in a series of clusters of singleantenna radios, when the clusters relay to each other, using concurrent transmission one cluster to the next, within a cooperative route. We address the case of no external synchronization, where one cluster derives its transmit synchronization from a packet received from the previous cluster...
A two-hop multi-user multiple-input-multiple-output (MU-MIMO) system with multiple single-antenna amplify-and-forward (AF) relays is demonstrated for the first time in a realistic indoor environment with a commercial software radio platform, using OFDM. Good trend correspondence is observed between the averaged error rate results of experiment and simulation, when zero forcing (ZF) detection is employed...
We propose a nonlinear fusion model to optimally reconstruct depth maps from monocular cues. The authors in [1] showed the effectiveness of estimating depth from individual cues, which saves bandwidth without compromising the quality. In this paper, we combine such depth map estimates as a Sensor Fusion problem. These depth map estimates are extracted from color, motion and texture structure of the...
Camera calibration is the essential step of obtaining 3D information from 2D views in the field of computer vision, which is widely used in the area of 3D reconstruction, navigation, visual supervision, etc. A camera self-calibration method based on dual constraints of multi-view images is proposed to make calibration possible when there is no reference calibration block or the movement of camera...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.