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In this paper, a wireless-powered cooperative multi-relay network is investigated to enhance the communication quality between two end users. Multiple intermediate relay terminals, which are off-grid and randomly spread within a certain cooperating area, attempt to decode-and-forward the source information to the destination by using the energy scavenged from the source radio-frequency signals. A...
Watermarking, known as a typical active network traffic analysis technique, has been widely used in stepping stone detecting and anonymity tracing. Among several different watermarking schemes, the interval centroid based watermarking scheme has shown its robustness in the problems such as chaff packet, packet drops and repacketization. It can be widely used in many applications, for it embeds watermarking...
Data reliability is a significant issue in large-scale storage systems. Erasure codes provide high data reliability via data recovery, which however generates a large amount of data transmission in the network. The bandwidth cost of transmitting the recovery needed data significantly impacts the performance of the located cluster. Existing work considers the single-failure as the most common failure...
Node failures often occur in large-scale data centers today. Erasure coded storage system provides high data reliability via data reconstruction. Existing work can improve reconstruction performance, while considering the transmission of recovery data as the main source of reconstruction overheads. Transmission costs are highly related with network topology, which is unfortunately overlooked. An ideal...
To present a MP3 player design based on microchip AT89C51SND1C, by using K9F1208 flash chips as the memory circuit. Use CS4330 as play chips, storage files through USB interfaces player on the device from PC download, and display screen using LCD1602. Simple design, low power, easy expand, low cost and high recognition. Because of the use of universal microchip, it can be easily portable to other...
Wireless video interphone cannot only provide portability, but also connect people through video communication, so it gains more and more interest in consumer electronics. To design such systems, it needs high performance video processing engine. In this paper, a Multi-processor system on a chip (MPSoC) is designed, in which there are one 32-bit RISC CPU and a low power, high performance H.264 codec...
This paper proposes an improved frame interpolation algorithm. The forward motion vectors between the previous and the next key frame is gained at first by traditional block matching algorithm. Then we get the backward motion vectors by using the dynamic search range based on the already known forward motion vector. After smoothing the bidirectional motion vectors, we can get more accurate motion...
Automatic voice query system for bank by phone was a hi-tech product based on computer technology, electronic communication technology and speech synthesis technology. The hardware design of this system adopted modularization design scheme, which centered on SCM AT89C51, and controlled the phone transceiver chip MT8870 and voice chip ISD4004, realizing voice query for bank account by phone remote...
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