beam n. 1.梁,栋梁,桁条;(船的)横梁。 2.船幅;(动物、人的)体幅。 3.(秤)杆,杠杆,(织机的)卷轴,经轴;(鹿角的)主干;车辕;犁柄;锄把。 4.(光线的)束,道,柱;【物理学】波束,射束。 5.(笑容、表情等的)焕现。 6.【无线电】有效播听范围。 7.【航空】信号电波,指向电波。 a beam of light 一束光线。 the common beam 标准秤;准则。 beam and scales 天平。 a beam of delight 高兴的表情,笑逐颜开。 an erector beam 【火箭】(发射时调整导弹位置的)千斤顶。 radio beam 无线电领航信号。 a landing beam 【航空】降落指示波。 abaft the beam = before the beam. a beam in one's eye 自己本身的大缺点〔与他人目中之刺相比,自己眼中有梁,源出《圣经》马太福音〕。 before the beam 【航海】正横前。 broad in the beam 〔口语〕臀部阔大。 fly the beam 【航空】按指向电波飞行。 fly the wet beam 【航空】顺着河流飞行。 kick [strike] the beam 1. (秤一方)翘起;过轻,不足抗衡,无足轻重。 2. 输,遭受失败。 off the beam 脱离航向,不顺利;不对头;做错。 on the beam 1. 【航海】与龙骨垂直地,正横地。 2. 在航向上;对头,做对。 on the port [larboard] beam 【航海】左舷正横前。 on the starboard beam 【航海】右舷正横前。 on the weather beam 【航海】迎着正横风。 ride the beam = fly the beam. vi. 1.辐射,发光,闪光。 2.微笑,眉开眼笑。 vt. 1.发射(光线、电波)。 2.向…放[播]送。 3.(用雷达)探测。 4.(用波束)导航(飞机等)。 beam the program at America 向美国播送节目。 the sun beaming overhead 红日当头照。 beam upon 看着…微笑。 beam with joy 眉飞色舞,笑逐颜开。
The simulation using the bi - directional beam propagation method proves that the demultiplexer can have very low insertion loss and high isolation ratio 藉由双向光束传播法来仿真此组件,结果显示此解多任务器具有很低的插入损耗和高的隔离度。
Digital signal processing technologies were used to produce spatial and directional beam in adaptive antenna . then the main beam aims at the coming direction of desired signal and the side lobe points to the coming direction of interference signals 自适应天线利用数字信号处理技术,产生空间定向波束,使天线主波束对准期望信号到达方向,旁瓣或零陷对准干扰信号到达方向。
Digital signal processing technologies were used to produce spatial and directional beam in smart antennas . then the main beam aims at the coming direction of reference user and the side lobe points to the coming direction of interference user 智能天线是利用数字信号处理技术,产生空间定向波束,使天线主波束对准期望用户信号到达方向,旁瓣或零陷对准干扰信号到达方向,达到充分高效利用移动用户信号并删除或抑制干扰信号的目的。
The application of smart antenna technique in wireless communications gives us a new solution . it allows the base station to transmit to and receive from mobiles by directional beams , which can improve the system performance by relieving the cci , decreasing the transmission power , improving the spectrum efficiency , enlarging the system capacity and so on 空域自适应滤波即智能天线技术在移动通信领域的引入为这些问题的解决带来了新的思路,它能够实现基站对移动台的定向发射和接收,从而能大大减轻系统的多址干扰,降低系统的发射功率,提供系统的频谱利用率,增大系统容量等好处。
Digital signal processing technologies were used to produce spatial and directional beam in smart antennas . then the main beam aims at the coming direction of reference user and the side lobe points to the coming direction of interference user . smart antennas are classified to switching - beam and tracking - beam 智能天线利用数字信号处理技术,产生空间定向波束,使天线主波束对准期望用户信号到达方向,旁瓣或零陷对准干扰信号到达方向,达到充分高效利用移动用户信号并删除或抑制干扰信号的目的。