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    • 111. 发明申请
    • APPARATUS AND METHOD FOR PROVIDING BANDWIDTH OF COGNITIVE RADIO SYSTEM
    • 提供认知无线电系统带宽的装置和方法
    • WO2009028789A1
    • 2009-03-05
    • PCT/KR2008/003341
    • 2008-06-13
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEKIM, Sang-WonSONG, Myung SunPARK, Chang HyunLIM, Sun Min
    • KIM, Sang-WonSONG, Myung SunPARK, Chang HyunLIM, Sun Min
    • H04B7/26
    • H04B1/28
    • The present invention relates to an apparatus and method for providing a bandwidth of a cognitive radio system. An apparatus and method for providing a bandwidth of a cognitive radio system according to an exemplary embodiment of the present invention calculates an oscillation frequency of a local signal that changes, by a predetermined value, center frequencies of fractional bands as bands that are not used temporally and spatially in partial bands of an externally provided broadcasting channel band. The apparatus and method for providing a bandwidth of a cognitive radio system outputs a first local signal at the calculated oscillation frequency, mixes the output first local signal and an external signal, and moves center frequencies of fractional bands of the external signal by a predetermined value. The apparatus and method for providing a bandwidth of a cognitive radio system filters a frequency band that is higher than an upper limit of a pass band having a predetermined bandwidth among moved frequency bands of the fractional bands to extract a first signal. Then, the apparatus and method for providing a bandwidth of a cognitive radio system mixes the extracted first signal and a second local signal and moves the center frequencies of the fractional bands in the first signal. The apparatus and method for providing a bandwidth of a cognitive radio system filters a frequency band that is lower than a lower limit of the pass band among the moved frequency bands of the fractional bands to extract at least one fractional band. The apparatus and method for providing a bandwidth of a cognitive radio system provides the extracted fractional band to a terminal and a base station, thereby improving frequency utilization efficiency.
    • 本发明涉及一种用于提供认知无线电系统的带宽的装置和方法。 根据本发明的示例性实施例的用于提供认知无线电系统的带宽的装置和方法计算将局部信号的振荡频率改变为预定值,将分数频带的中心频率改变为不在时间上使用的频带 并且在空间上在外部提供的广播频道频带的部分频带中。 用于提供认知无线电系统的带宽的装置和方法以计算的振荡频率输出第一本地信号,混合输出第一本地信号和外部信号,并将外部信号的分数段的中心频率移动预定值 。 用于提供认知无线电系统的带宽的装置和方法在分数段的移动频带之中过滤高于具有预定带宽的通带的上限的频带以提取第一信号。 然后,用于提供认知无线电系统的带宽的装置和方法将提取的第一信号和第二本地信号混合,并移动第一信号中的分数频带的中心频率。 用于提供认知无线电系统的带宽的装置和方法对分数段的移动频带中低于通带下限的频带进行滤波以提取至少一个分数频带。 用于提供认知无线电系统的带宽的装置和方法将提取的分数频带提供给终端和基站,从而提高频率利用效率。
    • 119. 发明申请
    • EPOXY RESIN MORTAR COMPOSITION AND COATING METHOD ON THE SURFACE OF THE CONCRETE
    • 环氧树脂组合物和混凝土表面涂层方法
    • WO2008147079A1
    • 2008-12-04
    • PCT/KR2008/002903
    • 2008-05-23
    • KIM, Sang yang
    • KIM, Sang yang
    • C08L63/00
    • C08G59/50C08K3/013C08K5/16C08L63/00C09D163/00
    • The present invention relates to an epoxy resin mortar composition which is used as a concrete floor surface finishing material and consists of a non-solvent type primer and a mortar with an intermediate level of viscosity and immobility, and a method of conducting the construction of a concrete floor surface using the epoxy resin mortar composition in a shortened constructional process. In case where the construction of a concrete floor surface is conducted using the epoxy resin mortar composition prepared according to the present invention at construction site, the constructional process is shortened to thereby greatly improve constructional workability. Also, the mechanical properties such as strength can be maintained at more than the level of a conventional prior art, and the cost and time required for maintaining and repairing the concrete surface can be significantly reduced to thereby remarkably improve productivity in a construction site.
    • 本发明涉及一种环氧树脂砂浆组合物,其用作混凝土地板表面处理材料,并且由非溶剂型底漆和具有中等粘度和不固定性的砂浆组成,以及进行 混凝土地板表面采用环氧树脂砂浆组成,缩短施工过程。 在使用本发明制备的环氧树脂砂浆组合物在施工现场进行混凝土地板表面的施工的情况下,缩短施工过程,从而大大提高结构加工性。 此外,诸如强度的机械性能可以保持在常规现有技术的水平以上,并且可以显着降低维护和修复混凝土表面所需的成本和时间,从而显着提高施工现场的生产率。