天线

Keywords Rocket bomb;fuze;remote setting;wireless data transmission;plasma;antenna design;setting window;anti-jamming

火箭弹；引信；遥控装定；无线数据传输；等离子体；天线设计；装定窗口；抗干扰

An FCC term for "the square root of the ratio of the root- mean-square free space field intensity produced at one mile in a horizontal plane in micro- volts per meter for one kilowatt antenna input power 137.6 mV/m."

FCC术语，"水平面1英里处产生的自由空间场强的均方根比值的平方根，表示为微伏每米。输入功率为1千瓦的天线功率增益为137.6 mV/m。"

This paper proposed a new QoS control method of voice service. On one hand, it uses adaptive transmission strategy, such as AMC, power control, sub-carrier allocation and antenna selection, to realize the reliable transmission in physical layer. On the other hand, it adopts ARQ and RRM in the data link layer to control the time delay and jitter of voice services.

本文提出的语音业务QoS的控制方法，一方面通过物理层的自适应传输策略，如调制编码方式、功率控制、子载波分配和天线选择等相关技术来实现物理层的可靠传输；另一方面，通过链路层的ARQ技术和无线资源管理策略来控制语音业务的时延及时延抖动。

The spatial nulling is implicitly achieved by estimating a sample covariance matrix and feeding its inverse into the extended Kalman filter. Computer simulations demonstrate robust performance of the algorithm in severe jamming.

针对多元天线接收机，提出了空时自适应信号处理算法，建立基于EKF自适应滤波技术的抗干扰模型，分析表明：在J／S即干扰／信号为60dB时，能较好的抑制窄带和宽带干扰作用。

In order to implement the satellitic data transmission, the antenna must target and track the goal precisely.

要实现卫星的数据传输，天线需要对目标进行精确的定位与跟踪。

The fourth section (chapter 5,6,7 and 8) introduces two kinds of satellitic antenna servo system based on two control chips. One is DSP and the other is FPGA.

第四部分详细介绍了两种以不同控制芯片为核心构成的卫星天线伺服系统。

What this antenna system uses is satellitic signal, so nonexistent ground base the limitation of the station, accomplished the whole world on real significance to enclothe.

这个天线系统使用的是卫星信号，所以不存在地面基站的限制，做到了真正意义上的全球覆盖。

In addition, the impacts of delay spread, scattering angle and antenna spacing on ergodic capacity are explored.

同时，还考察了多径数、散射角和天线间距等参数对信道容量的影响。

Radar sets generally employ large antennas to produce narrow beams in much the same way as a search-light reflector.

通常雷达采用大型天线以产生狭窄波束，其方法基本上与探照灯反射镜相似。

Radar sets generally employ huge antennas to produce narrow beams in abundance the alike way as a search-light reflector.

通常雷达采用大型天线以产生狭窄波束，其办法基本功上与探照灯反射镜相似。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎