搜索 - 科创网

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内容：还有一个问题，我们做的东西，功率比较大，可调频率范围也比较宽的，频率到达射频，也不能完全屏蔽，在频段上面要注意什么？

内容：输入变压器：从学校借的实验变压器匝数比 240:120 电阻R2：100Ω 电源E：1.5V干电池（用1号的，理论上可以持续工作200多天，如果用纽扣电池体积可以减小很多音频信号输入：Mp3 发射频率

内容：无线规则指一系列适合无线频谱合理使用的射频带宽、空中接口、相关协议和空间时间模式的设置。,b)用大量的传感器探测无线射频环境。,首先，将频谱区域分成3种类型：a)黑色区域，常被高能量的局部干扰占用；b)灰色区域，在部分时间被低能量干扰占用；c)白色区域，只有环境噪声而没有射频干扰的占用。,对系统射频激励可采用MTM-SVD法分析，在特定地理位置，将时间域和频域分别分组离散化计算，准确性较高。,1.3　基于自适应天线波束形成技术的干扰抑制　　为了优化射频激励的空间特性，可以采用自适应天线波束形成技术，对CR接收端的干扰进行抑制。

约找到 1041 条结果，耗时 0.422 秒

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