• EFFECTS OF AERONAUTICAL CHANNEL DYNAMICS ON THE PERFORMANCE OF LINK DEPENDENT ADAPTIVE RADIO (LDAR)

      Alam, Tasmeer; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      This paper includes aeronautical channel dynamics in the flight simulations of the Link Dependent Adaptive Radio (LDAR) for realistic measurement of the throughput gain with the adaption of the modulation and coding parameters for aeronautical telemetry. Previously, the LDAR flight simulator used a fixed channel for different phases of the flight. This paper shows the performance of LDAR using a dynamic channel created by the customized two ray channel model considering delay spread, Doppler and other channel dynamics. The merger of such dynamic channel simulator with the LDAR flight simulator could help the telemetering community by providing reliable simulation results before test flights.
    • ENERGY EFFICIENT CELLULAR NETWORK USING ADAPTIVE USER CLUSTERING ALGORITHM FOR SPARSELY POPULATED AREA

      Moazzami, Farzad; Astatke, Yacob; Kassa, Hailu B.; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      In this paper, an algorithm for distance aware energy efficient Base Stations (BSs) is proposed, which exploits the knowledge of the distance between the Mobile User (MUs) and the BS. The proposed algorithm changes the cell radius depending on user distribution in the cell. In this case adaptive (dynamically changing) concentric circles are virtually drawn so that the UEs in the same concentric circle can get constant power from the BS. It means that the mobile users(MUs) are clustered based on the distance from the BS. The energy consumption has been evaluated without sacrificing significant offered Quality of Service (QoS) on the cellular networks. The proposed scheme aids to achieve energy saving as a result of reduced transmit power based on reducing the radius of the concentric. As the radius reduces the transmit power is also reduced logarithmically. The system uses Omni directional antenna which covers all 360 degree of the cell at once. The simulation result shows that as the distance from the BS decreases, the transmission power decreases and the energy also decreases. The distance or the radius variation dynamically is based on the number of users in that track comparing to the minimum required number of threshold users. The result shows that an average of 0.1762 dB or 1.04 Watt which is 9.45% of the maximum transmit power can be saved by dynamically varying the base station the radius at the area of low traffic load for a single scan.
    • LINK DEPENDENT ADAPTIVE RADIO – DESIGN FOR iNET

      Moazzami, Farzad; Dean, Richard; Alam, Tasmeer; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      This paper focuses on the design of a simple Time Division Multiple Access (TDMA) signaling structure for the Link Dependent Adaptive Radio (LDAR) prototype wireless radio communication system to meet the timing requirements of the iNET standard. Built for aeronautical telemetry, LDAR adapts its modulation and coding scheme based on the channel condition in real time. In this paper, a simple protocol for transmission of Command Message and Data Message between Ground Station and Test Article is discussed. This protocol includes all analysis for the continuous adaptation of modulation scheme and coding rate to maximize throughput while ensuring a minimum level of link quality. This project was a collaborative effort between Morgan State University and Georgia Tech Research Institute and is a continuation of our previously published work on LDAR.
    • LOCALIZATION OF MEDICAL DEVICES BASED ON BLUETOOTH LOW ENERGY (BTLE)

      Moazzami, Farzad; Dean, Richard; Zegeye, Wondimu; Lee, Lawrence; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      Wireless devices have invaded the medical industry with a wide range of capability as components of a wireless personal area network (WPAN) and Wireless Body Area Network (WBAN). The recent advances in Internet of Things (IoT) promises even larger contributions to the future of medical applications. This paper investigates the Bluetooth Low Energy (Bluetooth Smart- BTLE) for indoor localization of HealthCare devices used in medical telemetry applications and demonstrates the key role that localization plays in tracking of Bluetooth Low Energy enabled medical devices. Proper tracking of these devices provides better management which would directly reduce the transmission of infectious diseases which can result from improper sharing of these devices. This work will investigate the novel indoor localization technologies of BTLE devices with creative research strategies, and their applications as a basis for ultimately improving health standard using BTLE localization.
    • OVERVIEW OF SECURE COGNITIVE RADIO MAC PROTOCOL IN THE PROPOSED 3.5 GHZ BAND

      Dean, Richard; Moazzami, Farzad; Oyediran, David; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      Spectrum sharing between federal and commercial users is proposed by the FCC and NTIA to open up the 3.5 GHz band for wireless broadband use. The proposed technology requires the detection and subsequent allocation of available licensed spectrum for temporary use by other users without compromising the privacy of the licensed user. DoD has a documented requirement of 865 MHz by 2025 to support telemetry but only 445 MHz is presently available. Research is presently on-going at DoD to realize, test and evaluate spectrum efficient technology with the aim to develop, demonstrate, and evaluate technology components required to enable flight and ground test telemetry operations. The use of cognitive radio (CR) in spectrum sharing has gained much popularity in that CR senses the unused spectrum at a specific time and location and dynamically allocates to users as required. This paper will provide an overview of a secured CR Media Access Protocols using the IEEE 802.22. Carrier Sense Multiple Access Collision Avoidance (CSMA/CA) will be utilized for protocol transmission in order to properly identify user’s location and identity thereby providing a secured network against false alarm from external attack.