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In this paper, we investigate the problem of dynamic power allocation for a multiuser transmitter supplied by hybrid energy sources in details. Specifically, we focus on the hybrid energy sources which include both the traditional power grid and various renewable sources whereby there are a few issues in considerations: (1) The energy harvested jointly from various renewable sources is time-varying...
In order to overcome the limitations of conventional ultrasound endoscope, we propose to develop a capsule ultrasound (CUS) device: an ingestible and disposable pill to inspect the multiple layers of the entire gastrointestinal (GI) tract as well as its surrounding organs, and to provide a convenient method for diagnosing GI diseases, such as abdominal cancers and lesions. The CUS device is composed...
To overcome the limitations of conventional ultrasound endoscopy, we developed a capsule ultrasound (CUS) device: an ingestible and disposable pill to inspect the multiple layers of the entire gastrointestinal (GI) tract and to provide a convenient method for diagnosing GI diseases. The CUS device was composed of three building blocks: the cylindrical capacitive micromachined ultrasonic transducer...
Offloading application to cloud can augment mobile devices' computation capabilities for the emerging resource-hungry mobile application, however it can also consume both much time and energy for mobile device offloading application remotely to cloud. In this paper, we develop a newly adaptive application offloading decision-transmission scheduling scheme which can solve above problem efficiently...
We are developing a capsule ultrasound (CUS) device - a pill with the capability to scan the gastrointestinal (GI) tract through ultrasound. In this paper, we discuss the design and fabrication of the main components of the CUS device including the CMUT array, front-end electronics, and the wireless transmitter. We demonstrate a successfully fabricated 128-element CMUT array with polydimethylsiloxane...
In this work, we consider a multiuser communication system in fading channels where the transmitter is supplied by hybrid energy sources including power grid and various renewable sources. Specially, the energy harvested from various renewable sources is stored in a limited capacity buffer, and the joint energy incoming is time-varying and possibly unpredictable. In addition, data arrives randomly...
In cellular networks, Device-to-Device (D2D) links can be utilized for data dissemination via unicast or/and multicast within a cluster. For traditional D2D relay schemes, D2D links with poor channel conditions may be the bottleneck and result in conservative resource utilization. Therefore, we suggest preferentially selecting the good quality D2D links with high achievable data rates, which induces...
One of the newest bands allowed for unlicensed device operation is called TV white space. It occupies partially UHF and VHF bands, which were reserved for licensed terrestrial TV broadcasting. New regulations throughout the world enable unlicensed use of TV white space if and only if no harmful interference is created to licensed devices. On the other hand, interference between unlicensed devices...
The paper presents a signal-to-noise ratio (SNR) mapping scheme for single-carrier (SC) frequency domain equalization (FDE) based millimeter-wave wireless personal area networks (WPANs). The effective SNR, defined as an average SNR over whole data frame after equalization, is a one-to-one mapper of the SNR in practical scenario in the sense of the same bit error rate (BER) performance. As the mapping...
In order to design a simple and highly accurate channel estimator for wireless personal area network systems, this paper proposes Golay sequence aided channel estimation. To evaluate the performance of proposed channel estimation, bit error rate performance of single-carrier transmission with frequency-domain equalization has been analyzed by computer simulation. When 8PSK modulation and Reed-Solomon...
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