无线电频段

无线电频段（例如发射电视信号）。

Band of radio frequencies for e.g. transmitting a TV signal .

但可用于通信的无线电频段是有限的。

But there is only a limited amount of radio spectrum available .

联邦通信委员会正在测试设备，看看空白无线电频段能不能在不干扰电视广播下使用。

The FCC is testing equipment to see if the white-space spectrum can be used without interfering with television broadcasts .

谷歌和微软同时也是作为一些高科技公司集团的一员，它们一直在游说联邦通信委员会允许未申请执照就可以使用空白无线电频段。

Google and Microsoft are part of a coalition of technology companies that has been lobbying the F.C.C.to allow unlicensed use of white-space spectrum .

并根据业余无线电频段和开放了的公共电视服务频段等共享频段的频谱特点，设计了一种基于混沌检测理论的弱信号检测系统模型。

We design a detecting system based on chaos theory in accordance with the spectrum features of amateur radio and public television service frequency bands .

当人们为了追求通信容量和多种业务，不断地开发超短波、微波等更高的无线电频段时，传统的长波、中波通信因为失去原有的优势，只能在特殊的场合找到应用。

When people consequently exploit super short wave and microwave radio frequency band for Communication capacity and multimedia facilities , the traditional long wave communication and medium one lost original priority , and they only can be used for some special occasion .

国际通用的无线电高度计频段在4.3GHz，高度计校准和相应的目标模拟一般都采用同轴电缆延迟线或声体波微波延迟线。

The international standard for radar altimeter is 4.3 GHz . The calibration of altimeter and corresponding target stimulation is implemented by co-core cable delay line or BAW microwave delay line .

论文验证了软件无线电对多频段多模式信号进行处理的灵活性，开放性和兼容性的特点，同时也表明FPGA可重构性和并行处理的优势，特别适合于软件无线电模块化标准化的设计要求。

The paper shows that the software radio system has the flexibility , openness and compatibility in processing the multi-band and multimode signal , and indicates that FPGA is especially suitable for the standardized designing of SWR with its advantage of reconfiguration and parallel processing .

软件无线电中的多频段信号带通采样

Bandpass sampling of multiband signals in software defined radio