Xin Min

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In this study, the performance of the frequency-modulated differential chaos shift keying (FM-DCSK) ultra-wideband (UWB) system is evaluated through two important system parameters, the guard interval and the integration interval of the integrator, over indoor communication channels. It is found that the existing FM-DCSK UWB system suffers severe(More)
—Recently, an ultra-wideband (UWB) system with frequency-modulated differential chaos shift keying (FM-DCSK) modulation has attracted increasing interest for its many distinctive superiorities over its conventional counterparts, especially in low-rate and low-power wireless personal area network (WPAN) applications. However, some of its drawbacks, such as(More)
Combining the single-input and multiple-output (SIMO) technology with the frequency-modulated differential chaos shift keying (FM-DCSK) modulation, a novel SIMO FM-DCSK ultra-wideband (UWB) system is proposed in this paper. Single sub-stream signal based on high order Walsh function is adopted in the transmitter and two detection schemes are presented in(More)
With the increasing development of mobile rich media applications, it has become an important research topic on how to reduce application response time so as to run more smoothly on resource-limited devices. On the basis of the in-depth study of character drawing mode, cache replacement policy and full use of the cache resources, this paper presents a(More)
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