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Vehicle-to-vehicle (V2V) communication which supports ubiquitous information exchange and content sharing among vehicles with little or no human intervention becomes a key enabler for intelligent transportation industry. In this paper, we adopt a two-hop relay transmission mode to maximize the total spectrum efficiency of a device-to-device (D2D) based vehicular cooperative network while ensuring...
Non-orthogonal multiple access (NOMA), millimeter wave (mmWave), and massive multiple-input-multiple-output (MIMO) have been emerging as key technologies for fifth generation mobile communications. However, less studies have been done on combining the three technologies into the converged systems. In addition, how many capacity improvements can be achieved via this combination remains unclear. In...
Minimum hop routing is an energy-efficient routing protocol with minimized energy consumption, but the reliability of data transmission is not enough. The routes tend to have a minimum hop count but contain weak links, which cause large number of data retransmissions. In this paper, a transmission power selection mechanism is proposed, where the power to transmit an overhead packet and a data packet...
Abstract- Ultrasonic transient elastography for tissue biomechanical parameters (such as shear velocity) measurement has significant clinical applications. The Youngs modulus, which represent the tissue stiffness, is a recognized indicator of many diseases such as liver fibrosis, breast cancer, can be directly calculated from the shear velocity. In order to estimate the shear velocity accurately,...
Elastography is an emerging ultrasonic imaging technique; it has a broad clinical application for tissue parameter estimation. We designed a real-time system to measure tissue stiffness information non-invasively based on transient elastography. The system performance mainly depends on the circuit design before the Analog-to-Digital Converter (A/D), especially the preamplifier part which is very sensitive...
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