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In the process of making radio programs, Radio stations need to get a IoT of audio material, which are usually stored on the FTP server. The traditional radio program production station will download each audio, and do not consider the server's and the local environment, using a single-threaded download, which results in poor user experience. This paper designs an efficient download mechanism, which...
Wide bandwidth for an air-coupled piezoelectric micromachined transducer (PMUT) is important to achieve short pulse transmission and reception in pulse-echo imaging with high axial resolution. Here, we report experimental results on an air-coupled PMUT with high displacement sensitivity up to 5500 nm/V, high 3 dB bandwidth of 20.3 kHz, and correspondingly short transmission time of 0.05 ms, achieved...
This paper presents wideband millimeter-wave channel characterization based on measurements at 26GHz with 1GHz bandwidth carried out in an open office at KeySight Beijing, China, which is a representative of an indoor hotspot scenario. In the time domain measurements, an omni-directional biconical horn is used as the transmitter, while at the receiver a 26dBi horn is applied and rotated with 5o angular...
Massive MIMO has been chosen as one of the candidate technologies of the fifth-generation mobile communication system (5G), and channel modeling of massive MIMO is of great importance. The most direct and effective approach to investigate the propagation characteristics of massive MIMO channels is channel measurements. However, there are only few measurements of massive MIMO channels, and there still...
5G, the new generation of mobile networks, attracts lots of interests and attentions in wireless communication with its aggressive performance goals. To be able to provide much higher data rate than today, 5G mobile networks will operate at frequencies higher than the crowded frequency bands used today, with broader bandwidth. Understanding the propagation characteristics of the wireless channel under...
5G, the new generation of mobile networks, attracts lots of interests and attentions in wireless communication with its aggressive performance goals. To be able to provide much higher data rate than today, 5G mobile networks will operate at frequencies higher than the crowded frequency bands used today, with broader bandwidth. Understanding the propagation characteristics of the wireless channel under...
With recent advancements in SoC integration, modern SoC architectures can employ more than 20 PLLs [1]. To address SoC clocking needs with an ever reducing power budget, a deep sub-mW to low-mW PLL having a FoM between −226dB and −234dB from 0.8GHz to 5GHz is presented. The PLL features a modular implementation and therefore could be used as the local clock source or as part of a clock-generation...
A common approach for improving application performance is to process its working set from memory. For datasets that do not fit into DRAM of a single machine this leads to a design of scale-out applications, where the application dataset is partitioned and processed by a cluster of machines. Performance of distributed memory applications, implemented using MPI (Message Passing Interface), inherently...
High-speed uni-traveling-carrier photodetector (UTC-PD) and three modified uni-traveling-carrier photo-detectors (MUTC-PDs) incorporating different doping profile are designed and simulated for a wavelength of 1550 nm in this letter. According to comparison of simulated results, UTC-PD-1, MUTC-PD-2 and MUTC-PD-3 with constant doping profile, step-constant doping profile and Gaussian doping profile...
Two compact planar UWB MIMO antennas for wireless communications are presented. The first antenna, which operates in the 2.3–12 GHz frequency band, has a size of 72 mm × 48 mm × 0.76 mm. High port-to-port isolation over the whole ultra-wideband is achieved by using an inverted-T stub between the elements. The second antenna has a size of 34 mm × 47 mm × 1.6 mm, and operates in the band from 3.8 to...
Service discovery in vehicular networks has been extensively investigated in literature. Collecting and disseminating data in high mobility networks in a reliable and efficient way without exhausting network bandwidth is still challenging, due to unreliable channel access in broadcast scenarios and thus results in loss of time through resending packets. Sending delta information to reduce network...
A novel millimeter-wave (MMW) band ultra-wideband (UWB) signal generation scheme is proposed in this paper. A theoretical model is built to demonstrate the signal generation and to analyze the signal quality. The mechanism to suppress the residual local oscillation and low frequency components is investigated. The influence of the input signal over the bandwidth is studied. A 24 GHz-band MMW-UWB signal...
This paper studies H∞ filtering problem for T-S fuzzy systems in network environment. Considering the limitations of network communication bandwidth, a new discrete event-triggered communication scheme is introduced to avoid the transmission of unnecessary information. Whether or not the measured output is sent depends on the sampled output of the recent transmission and the error between the current...
Phase-change random access memory (PRAM) is considered as one of the most promising candidates for future memories because of its good scalability and cost-effectiveness [1]. Besides implementations with standard interfaces like NOR flash or LPDDR2-NVM, application-oriented approaches using PRAM as main-memory or storage-class memory have been researched [2–3]. These studies suggest that noticeable...
There has been a significant amount of recent research in the computer networking community on the emerging wireless networking paradigm known as Mobile Networks; while the real-time image processing community have expended much effort on the development of scalable video encoding techniques and investigating the multipath streaming of real-time multimedia content. This work draws together the key...
In mobile systems, the demand for the energy saving continues to require a low power memory sub-system. During the last decade, the floating-gate flash mem ory has been an indispensable low power memory solution. However, NOR flash memory has begun to show difficulties in scaling due to the device's reliability and yield issues. Over the past few years, phase-change random access memory (PRAM) has...
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