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Estimation of Antenna Pose in the Earth Frame Using Camera and IMU Data from Mobile Phones

ABSTRACT

The poses of base station antennas play an important role in cellular network optimization. Existing methods of pose estimation are based on physical measurements performed either by tower climbers or using additional sensors attached to antennas. Continue reading

Impact of Beamforming on the Path Connectivity in Cognitive Radio Ad Hoc Networks

ABSTRACT

This paper investigates the impact of using directional antennas and beamforming schemes on the connectivity of cognitive radio ad hoc networks (CRAHNs). Specifically, considering that secondary users use two kinds of directional antennas, i.e., Continue reading

First Results of Field Absolute Calibration of the GPS Receiver Antenna at Wuhan University

ABSTRACT

GNSS receiver antenna phase center variations (PCVs), which arise from the non-spherical phase response of GNSS signals have to be well corrected for high-precision GNSS applications. Without using a precise antenna phase center Continue reading

A Double-Negative Metamaterial-Inspired Mobile Wireless Antenna for Electromagnetic Absorption Reduction

ABSTRACT

A double-negative metamaterial-inspired antenna is presented for mobile wireless applications. The antenna consists of a semi-circular radia ting patch and a 3 × 4 hexagonal shaped metamaterial unit cell array in the ground plane. The antenna is Continue reading

Control Parameters Optimization based on Co-Simulation of a Mechatronic System for an UA-based Two-Axis Inertially Stabilized Platform

ABSTRACT

This paper presents a method based on co-simulation of a mechatronic system to optimize the control parameters of a two-axis inertially stabilized platform system (ISP) applied in an unmanned airship (UA), by which high control performance Continue reading

Coordinated Control of Superconducting Fault Current Limiter and Superconducting Magnetic Energy Storage for Transient Performance Enhancement of Grid-Connected Photovoltaic Generation System

ABSTRACT

In regard to the rapid development of renewable energy sources, more and more photovoltaic (PV) generation systems have been connected to main power networks, and it is critical to enhance their transient performance under short-circuit Continue reading

An Enhanced System Architecture for Optimized Demand Side Management in Smart Grid

ABSTRACT

Demand Side Management (DSM) through optimization of home energy consumption in the smart grid environment is now one of the well-known research areas. Appliance scheduling has been done through many different algorithms to reduce Continue reading

Modern Digital Chirp Receiver: Theory, Design and System Integration

ABSTRACT

Chirp signals can achieve a high range resolution without sacrificing SNR or maximum range, making them a strong candidate for use in radar and sonar applications. Chirp signals are also power efficient and resistant to interference, making them well Continue reading

A Structured ASIC Approach to a Radiation Hardened by Design Digital Single Side band Modulator for Digital Radio Frequency Memories

ABSTRACT

Digital Radio Frequency Memories (DRFM) are widely used as modules in digital signal processing. These modules can provide several forms of signal manipulation and storage capabilities. With single event effects caused by environmental radiation the Continue reading

Design, Development and Implementation of Intelligent Algorithms to Increase Autonomy of Quadrotor Unmanned Missions

ABSTRACT

This thesis presents the development and implementation of intelligent algorithms to increase autonomy of unmanned missions for quadrotor type UAVs. A six-degree-of freedom dynamic model of a quadrotor is developed in Matlab/Simulink in Continue reading

Design and Evaluation of a Discrete Wavelet Transform based Multi-Signal Receiver

ABSTRACT

General purpose receivers of today are designed with a broad bandwidth so that the receiver can accept a wide range of signal frequencies. These receivers usually accept one signal along with an y interference that is included. To increase the signal Continue reading