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Reza Barazideh - One of the best experts on this subject based on the ideXlab platform.

  • Interference Analysis for Finite-Area 5G mmWave Networks Considering Blockage Effect
    IEEE Access, 2018
    Co-Authors: Solmaz Niknam, Balasubramaniam Natarajan, Reza Barazideh
    Abstract:

    With the overcrowded sub-6-GHz bands, millimeter wave (mmWave) bands offer a promising alternative for the next-generation wireless standard, i.e., 5-G. However, the susceptibility of mmWave signals to severe pathloss and shadowing requires the use of highly directional antennas to overcome such adverse characteristics. Building a network with directional beams changes the interference behavior, since, narrow beams are vulnerable to blockages. Such sensitivity to blockages causes uncertainty in the interfering Node locations and not all of the potential interfering Nodes actively contribute to the interference power level at a certain location of the network. Configuration uncertainty may also manifest in the spectral domain while applying dynamic channel and frequency assignment to support 5-G applications. In this paper, we first propose a blockage model considering mmWave specifications. Subsequently, using the proposed blockage model, we derive a spatial-spectral interference model for dense finite-area 5-G mmWave networks. The proposed interference model considers randomness of Node Configuration in both spatial and spectral domains. Finally, the error performance of the network from an arbitrarily located user perspective is calculated in terms of bit error rate and outage probability metrics. The analytical results are validated via Monte Carlo simulations. It is shown that considering mmWave specifications and also randomness in both spectral and spatial Node Configurations leads to a noticeably different interference profile.

  • A Spatial-Spectral Interference Model for Dense Finite-Area 5G mmWave Networks
    arXiv: Signal Processing, 2017
    Co-Authors: Solmaz Niknam, Balasubramaniam Natarajan, Reza Barazideh
    Abstract:

    With the overcrowded sub-6 GHz bands, millimeter wave (mmWave) bands offer a promising alternative for the next generation wireless standard, i.e., 5G. However, the susceptibility of mmWave signals to severe pathloss and shadowing requires the use of highly directional antennas to overcome such adverse characteristics. Building a network with directional beams changes the interference behavior, since, narrow beams are vulnerable to blockages. Such sensitivity to blockages causes uncertainty in the active interfering Node locations. Configuration uncertainty may also manifest in the spectral domain while applying dynamic channel and frequency assignment to support 5G applications. In this paper, we first propose a blockage model considering mmWave specifications. Subsequently, using the proposed blockage model, we derive a spatial-spectral interference model for dense finite-area 5G mmWave networks. The proposed interference model considers both spatial and spectral randomness in Node Configuration. Finally, the error performance of the network from an arbitrarily located user perspective is calculated in terms of bit error rate (BER) and outage probability metrics. The analytical results are validated via Monte-Carlo simulations. It is shown that considering mmWave specifications and also randomness in both spectral and spatial Node Configurations leads to a noticeably different interference profile.

Solmaz Niknam - One of the best experts on this subject based on the ideXlab platform.

  • Interference Analysis for Finite-Area 5G mmWave Networks Considering Blockage Effect
    IEEE Access, 2018
    Co-Authors: Solmaz Niknam, Balasubramaniam Natarajan, Reza Barazideh
    Abstract:

    With the overcrowded sub-6-GHz bands, millimeter wave (mmWave) bands offer a promising alternative for the next-generation wireless standard, i.e., 5-G. However, the susceptibility of mmWave signals to severe pathloss and shadowing requires the use of highly directional antennas to overcome such adverse characteristics. Building a network with directional beams changes the interference behavior, since, narrow beams are vulnerable to blockages. Such sensitivity to blockages causes uncertainty in the interfering Node locations and not all of the potential interfering Nodes actively contribute to the interference power level at a certain location of the network. Configuration uncertainty may also manifest in the spectral domain while applying dynamic channel and frequency assignment to support 5-G applications. In this paper, we first propose a blockage model considering mmWave specifications. Subsequently, using the proposed blockage model, we derive a spatial-spectral interference model for dense finite-area 5-G mmWave networks. The proposed interference model considers randomness of Node Configuration in both spatial and spectral domains. Finally, the error performance of the network from an arbitrarily located user perspective is calculated in terms of bit error rate and outage probability metrics. The analytical results are validated via Monte Carlo simulations. It is shown that considering mmWave specifications and also randomness in both spectral and spatial Node Configurations leads to a noticeably different interference profile.

  • A Spatial-Spectral Interference Model for Dense Finite-Area 5G mmWave Networks
    arXiv: Signal Processing, 2017
    Co-Authors: Solmaz Niknam, Balasubramaniam Natarajan, Reza Barazideh
    Abstract:

    With the overcrowded sub-6 GHz bands, millimeter wave (mmWave) bands offer a promising alternative for the next generation wireless standard, i.e., 5G. However, the susceptibility of mmWave signals to severe pathloss and shadowing requires the use of highly directional antennas to overcome such adverse characteristics. Building a network with directional beams changes the interference behavior, since, narrow beams are vulnerable to blockages. Such sensitivity to blockages causes uncertainty in the active interfering Node locations. Configuration uncertainty may also manifest in the spectral domain while applying dynamic channel and frequency assignment to support 5G applications. In this paper, we first propose a blockage model considering mmWave specifications. Subsequently, using the proposed blockage model, we derive a spatial-spectral interference model for dense finite-area 5G mmWave networks. The proposed interference model considers both spatial and spectral randomness in Node Configuration. Finally, the error performance of the network from an arbitrarily located user perspective is calculated in terms of bit error rate (BER) and outage probability metrics. The analytical results are validated via Monte-Carlo simulations. It is shown that considering mmWave specifications and also randomness in both spectral and spatial Node Configurations leads to a noticeably different interference profile.

Balasubramaniam Natarajan - One of the best experts on this subject based on the ideXlab platform.

  • Interference Analysis for Finite-Area 5G mmWave Networks Considering Blockage Effect
    IEEE Access, 2018
    Co-Authors: Solmaz Niknam, Balasubramaniam Natarajan, Reza Barazideh
    Abstract:

    With the overcrowded sub-6-GHz bands, millimeter wave (mmWave) bands offer a promising alternative for the next-generation wireless standard, i.e., 5-G. However, the susceptibility of mmWave signals to severe pathloss and shadowing requires the use of highly directional antennas to overcome such adverse characteristics. Building a network with directional beams changes the interference behavior, since, narrow beams are vulnerable to blockages. Such sensitivity to blockages causes uncertainty in the interfering Node locations and not all of the potential interfering Nodes actively contribute to the interference power level at a certain location of the network. Configuration uncertainty may also manifest in the spectral domain while applying dynamic channel and frequency assignment to support 5-G applications. In this paper, we first propose a blockage model considering mmWave specifications. Subsequently, using the proposed blockage model, we derive a spatial-spectral interference model for dense finite-area 5-G mmWave networks. The proposed interference model considers randomness of Node Configuration in both spatial and spectral domains. Finally, the error performance of the network from an arbitrarily located user perspective is calculated in terms of bit error rate and outage probability metrics. The analytical results are validated via Monte Carlo simulations. It is shown that considering mmWave specifications and also randomness in both spectral and spatial Node Configurations leads to a noticeably different interference profile.

  • A Spatial-Spectral Interference Model for Dense Finite-Area 5G mmWave Networks
    arXiv: Signal Processing, 2017
    Co-Authors: Solmaz Niknam, Balasubramaniam Natarajan, Reza Barazideh
    Abstract:

    With the overcrowded sub-6 GHz bands, millimeter wave (mmWave) bands offer a promising alternative for the next generation wireless standard, i.e., 5G. However, the susceptibility of mmWave signals to severe pathloss and shadowing requires the use of highly directional antennas to overcome such adverse characteristics. Building a network with directional beams changes the interference behavior, since, narrow beams are vulnerable to blockages. Such sensitivity to blockages causes uncertainty in the active interfering Node locations. Configuration uncertainty may also manifest in the spectral domain while applying dynamic channel and frequency assignment to support 5G applications. In this paper, we first propose a blockage model considering mmWave specifications. Subsequently, using the proposed blockage model, we derive a spatial-spectral interference model for dense finite-area 5G mmWave networks. The proposed interference model considers both spatial and spectral randomness in Node Configuration. Finally, the error performance of the network from an arbitrarily located user perspective is calculated in terms of bit error rate (BER) and outage probability metrics. The analytical results are validated via Monte-Carlo simulations. It is shown that considering mmWave specifications and also randomness in both spectral and spatial Node Configurations leads to a noticeably different interference profile.

Kwokwah Hung - One of the best experts on this subject based on the ideXlab platform.

  • design of Node Configuration for all optical multi fiber networks
    IEEE Transactions on Communications, 2002
    Co-Authors: Yiuwing Leung, Gaoxi Xiao, Kwokwah Hung
    Abstract:

    It is cost-effective to install multiple fibers in each link of an all-optical network, because the cost of fibers is relatively low compared with the installation cost. The resulting network can provide a large capacity for good quality of service, future growth, and fault tolerance. If a Node has more incoming/outgoing fibers, it requires larger optical switches. Using the current photonic technology, it is difficult to realize large optical switches. Even if they can be realized, they are expensive. To overcome this problem, we design a Node Configuration for all-optical networks. We exploit the flexibility that, to establish a lightpath across a Node, we can select any one of the available channels in the incoming link and any one of the available channels in the outgoing link. As a result, the proposed Node Configuration requires significantly smaller optical switches while it can result in nearly the same blocking probability as the existing one. We demonstrate that a good network design is to adopt the proposed Node Configuration and slightly more fibers in each link, so that the network requires small optical switches while it has a small blocking probability.

M Grund - One of the best experts on this subject based on the ideXlab platform.

  • experimental results in synchronous clock one way travel time acoustic navigation for autonomous underwater vehicles
    International Conference on Robotics and Automation, 2007
    Co-Authors: Ryan M Eustice, Hanumant Singh, Louis L Whitcomb, M Grund
    Abstract:

    This paper reports recent experimental results in the development and deployment of a synchronous-clock acoustic navigation system suitable for the simultaneous navigation of multiple underwater vehicles. The goal of this work is to enable the task of navigating multiple autonomous underwater vehicles (AUVs) over length scales of O(100 km), while maintaining error tolerances commensurate with conventional long-baseline transponder-based navigation systems (i.e., O(1 m)), but without the requisite need for deploying, calibrating, and recovering seafloor anchored acoustic transponders. Our navigation system is comprised of an acoustic modem-based communication/navigation system that allows for onboard navigational data to be broadcast as a data packet by a source Node, and for all passively receiving Nodes to be able to decode the data packet to obtain a one-way travel time pseudo-range measurement and ephemeris data. We present results for two different field experiments using a two-Node Configuration consisting of a global positioning system (GPS) equipped surface ship acting as a global navigation aid to a Doppler-aided AUV. In each experiment, vehicle position was independently corroborated by other standard navigation means. Initial results for a maximum-likelihood sensor fusion framework are reported.