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A wireless power transmission device consists of a transmitting module and a receiving module. Unlike most wireless power transmission researches, this paper based on the research that adopts the 15-volt direct-current power as its auxiliary power, and inversion efficiency is also considered in relation to system transmission efficiency. The research made the best of Control IC SG3525 in inversion...
Aiming at the deficiencies in the traditional electronic signature system and biological information characteristics randomizing signature system, we propose an electronic signature system with credible fusion verification, which was equipped with not only the function of identifying the traditional electronic signature, but also the function of concealing the biological information characteristics...
Orthogonal Frequency Division Multiplexing (OFDM) has been considered as a strong candidate for next generation wireless communication systems. Compared to traditional OFDM, Single Carrier OFDM (SC-OFDM) has demonstrated excellent bit error rate (BER) performance, as well as low peak to average power ratio (PAPR). Similar to other multi-carrier transmission technologies, SC-OFDM suffers significant...
To acquire weak signals GPS reiceiver requires longer observation intervals to accumulate sufficient energy from the signal of intermediate frequency. Full bit method avoids effects of the data bit modulation thereby preserves a longer coherent integration yet consumes too much time and resources. In this paper, an enhanced full bit method is proposed, which aims at speeding up the full bit acquisition...
Sound field is described by sound pressure and velocity; this is different from the former concept. This paper has discussed the application of vertical sound intensity stream in shallow and low frequency sound field based on fast field program (FFP) model. The vector signal processing technique is analyzed from physical angle of view, and is made use of to judge the surface ship or submarine. For...
Multi-carrier code division multiple access (MC-CDMA)has been considered as a strong candidate for next generation wireless communication system due to its excellent performance in multi-path fading channel and simple receiver structure. However, like all the multi-carrier transmission technologies such as OFDM, the inter-carrier interference (ICI) produced by the frequency offset between the transmitter...
For orthogonal frequency division multiplexing (OFDM) communication systems, the orthogonality among subcarriers is lost in mobile radio channels due to the frequency offsets caused by mobility. As a direct result, intercarrier interference (ICI) is observed on each and every subcarrier, leading to significant performance degradation. Many ICI cancellation methods such as windowing and frequency domain...
Real-time multicast video distribution is an important component of many multimedia applications. Our work addresses the fairness problem in feedback-controlled multicast video distribution systems over best effort networks (such as the Internet). We have proposed, implemented and experimented with a scheme called destination set grouping (DSG), where a source maintains a small number of video streams,...
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