频带

In the described system, in order to transmit the narrow-band analog signals or low speed digital signals at any time and under any climatic condition, sun-blind-region ultraviolet is used as information carrier, the modulated low voltage mercury-vapor lamp is used as emission device.

所描述的系统是以日盲区紫外光作为信息载体的，用被调制的低压汞蒸汽紫外放电灯作为发射器件，以日盲型滤光片和光电倍增管或日盲型紫外光电倍增管作为接收器件，以达到在任何时间和在任何气候下完成窄频带模拟或低速数字信号的传输。

Several high speed signal processing technologies of wideband digital receivers,including monbit IFM technology,polyphase channelized technology,channelized digital receiver based on FFT and RF bandpass sampling microwave digital receiver,are discussed in detail.

详细讨论了宽带数字接收机的几种高速信号处理技术，包括单比特瞬时测频技术、多相滤波信道化技术、基于FFT的信道化接收机和射频带通采样微波数字接收机，最后提出了在宽带中频数字接收机高速信号处理领域需要深入研究的有关技术。

Secondly, there has severe noise with width spectrum due to the powerful irradiating microwave pulses. This is a big challenge to design and realize the receiver subsystem to detect the weak MITA signals.

其次，激励所用的高功率微波脉冲会产生很宽频带的强电磁干扰，这对于微弱的微波热致超声波的检测形成巨大的挑战。

One layer is near the Earth space, the other is near the Moho.

利用2004～2005年Hi-CLIMB计划架设在藏南日喀则附近由28台宽频带数字地震仪组成的二维台阵的地震记录，应用双差层析定位方法对454个区域地震进行了精确重定位，共确定了340个地震的精确位置。

Based on experiment data of flank array vibration noise, we researched the adaptive noise cancellation with monophonic and broad band signal by LMS algorithm and NLS algorithm.

研究了滤波器权长、算法收敛步长、信号和噪声频带范围对噪声抵消的影响，在此基础上选用合适的权长和步长对舷侧阵振动噪声进行了抵消。

In Chapter 3, some monopole antennas are studied, which is focused on the realization of light weighted and miniaturization of the antennas.

通过比较分析，获得了天线性能随不同几何参数的频率变化规律，特别是宽频带特性的频变规律。

The communications mode under computer control system which composes such as large covered area、wider frequency band、longer transmission distance、bigger volume、high quality、flexibility and multi-address connections.

利用卫星通信与航天技术相结合并由计算机实现控制的通信方式，其优点是覆盖面积大、频带宽、传输距离远、容量大、质量好、机动灵活并可实现多址连通等优点。

For using the time and space frequency resources in imaging transmission fully, a new hybrid optical code division multiaddress coding scheme is proposed, which is based on imaging transmission with two-dimensional optical orthogonal pattern code and time frequency spread spectrum.

为了在成像光通信中充分利用时间和空间两种频带资源，以成像光通信为基础，提出一种利用二维光正交Pattern码结合时域扩频实现光码分多址编码的新方案。

By bridging multiple hyperbands, service quality can be enhanced.

通过桥接多个超高频带，可以提高服务质量。

At the same time, to cover the entire bandwidth, multipoint automatic WCAWE is also proposed.

同时，为了覆盖整个关心的频带，多点自动化的WCAWE技术也同时也被提出。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。