查询词典 antennas

Furthermore, a pseudo-antenna augmentation scheme is employed such that sphere decoding can be applied where the number of receive antennas is less than that of transmit antennal; thus enhance the applicability of this powerful algorithm.

此外，我们利用一种增加虚拟天线的架构使得球体演算法能被应用在当传送天线个数大於接收天线个数的情况；这个方法增加了球体解码演算法更大的可用性，而且不致改变它原有的低运算量及高效能的特性。

Beamforming is one chief technique of smart antennas and there were a lot of appliable algorithms for it. These algorithms work bad unless using training sequences or the DOA information of the signal of interest, and their performance descends rapidly in the environment of multipath.

波束形成算法需要使用训练序列，或需要预先掌握期望信号的DOA信息，并且在多径环境中工作性能急剧下降。

A mountain range bristling with antennas harbors a maze of bombproof underground arsenals and shelters served by a tunnel 4km long.

天线林立的山脉中，隐藏着如迷宫般不怕炮击的地下军火库，以及有4公里长的隧道与外界连接的防空洞。

Stand an end A mountain range bristling with antennas harbors a maze of bombproof underground arsenals and shelters served by a tunnel 4km long.

天线林立的山脉中，隐藏着如迷宫般不怕炮击的地下军火库，以及有 4 公里长的隧道与外界连接的防空洞。

The Dactylopius confusus king antennas scanning electron microscope result indicated that:Four types of sensilla on the antenna of Dactylopius confusus,namely Trichoid sensilla,campaniform sensilla basiconic sensilla,styloconic sensilla.

胭脂虫雄虫触角的扫描电(来源：0e5e0eABC论文网www.abclunwen.com)镜结果表明：雄虫触角上生有4种感器，即毛形感器、钟形感器、锥形感器及腔锥形感器。

All these characteristics can extend frequency band , reduce antennaelectric size and improve impedance characteristics. In order to miniaturization ofantenna, impedance complete compensate and matching optimization of electricallysmall antenna are brought forward, and this method is applied to the discage antennas.

从阻抗特性和辐射特性的实测数据表明，水加载单极振子天线的谐振频率能很好地向低端下移，局部水加载单极圆锥天线在保持原有宽频带特性的前提下，以较少的效率损失实现了较大范围向低频区扩展，即天线小型化，这将为短波超短波波段天线进一步的小型化设计提供很好的思路。

Tesla's technology used "near field" effects of coils, capacitors, and transmission lines, not the dipole antennas that Hertzian waves use, and in that sense his waves were non-Hertzian.

&特斯拉的技术使用&近场&电容效应的线圈，和传输线，而不是使用波偶极子天线的赫兹，在这个意义上说他的海浪是&非赫兹。

In the intersatellite coherent optical communication, the vibration of a satellite will lead to a pointing error of transmitting and receiving antennas, which will decrease the signal-to-noise ratio and increase the bit error rate. In this paper, the Rayleigh distribution is taken as the pointing error model caused by satellite vibration, and PSK homodyne communication scheme is used as an example to analyze the influence of the satellite vibration on the system instantaneous BER and average BER. The simulation calculation result of BER is given.

针对星间相干激光通信中卫星平台的振动造成发射天线和接收天线的瞄准角误差，使系统信号信噪比下降，误码率增加，该文以瑞利分布作为振动造成的瞄准角误差模型，结合高斯本振光和艾里信号光外差检测模型，以PSK零差通信体制为例分析卫星振动对系统的瞬时误码率和平均误码率的影响，给出误码率仿真计算结果。

They have 6 legs just like any other insect and 4 wings and a pair of antennas, which are often knobbed.

它们和其他的昆虫一样有六只脚，4个翅膀和一对触角，触角多是有节的。

This way, the pilot could home in on his target by matching the sizes of echo pulses from the two antennas, sort of like "lobing" described earlier in this article. When the two echoes were equal, the plane was headed directly at its target.

这样飞行员便可通过比较两天线的回迹来导向他的目标，如同前面介绍过的&波瓣法&，当两回迹大小相等时，目标就在前面。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。