نتایج جستجو برای: frequency ratio
تعداد نتایج: 948158 فیلتر نتایج به سال:
The development of high-frequency power converters is continuously improving their density, efficiency and fast dynamic response. Among them, high-voltage-conversion-ratio (HVCR) dc–dc are widely used in high gain, i.e., step-up/-down or bidirectional applications, such as supply for data center, dc micro-grids, electrical vehicle charging systems, etc. In this article, the current main HVCR cl...
We demonstrate how virtual MIMO techniques can be implemented in a next-generation mobile communication system. In order to test basic principles, joint spatiotemporal processing of two users has been implemented in an uplink scenario. A prerequisite of virtual MIMO is accurate synchronization. It is shown that the carrier frequency offset can be reduced to a few Hz only at small signal-to-nois...
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