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negative-frequency
- 论频谱中负频率成分的物理意义,希望对大家理解负频率有帮助-On the negative frequency components of the spectrum in the physical sense, we want to help understand the negative frequency
Lux-Meter
- 数字式测光表,测量亮度 (外国人设计的) 在照度仪通常是用来测量照明。光照是如何光通量水平是一个面积下降。光通量是可见的组件,它是在辐射通量(光功率)以人眼的相对灵敏度分歧可见光谱定义。这意味着照度很好适合人眼的感觉从光的水平。-The Lux Meter is usually used to measure illumination. The illumination is how level of luminous flux is falling on a surface area. T
joan
- 【摘要】感知无线电可以自动感知外界的无线环境并能调整系统参数以适应环境的变化。频谱检测是感知无线电的关键 技术之一,要求感知用户可靠、快速地检测频谱空洞。文中按照主用户发射端检测和主用户接收端检测,对当前的主要频谱检测 算法进行了分类,并对频谱检测算法进行了讨论和对比研究,给出了在IEEE802.22和频谱池结构中的频谱检测的具体应用。-Abstract cognitive radio can automatically sense the external environment an
OFDM-1
- To fully exploit wireless radio resource and, thus, increase spectrum efficiency, cognitive radios shall sense wire- less environments and identify interference to allow opportunis- tic transmissions for secondary systems. Based on Chen et al.