beam communication 中文意思是什麼

beam communication 解釋
定向通信
  • beam : n 1 梁，棟梁，桁條；（船的）橫梁。2 船幅；（動物、人的）體幅。3 （秤）桿，杠桿，（織機的）卷軸，...
  • communication : n. 1. 通訊，通知；交換；信息；書信，口信，通報。2. 傳達，傳授；傳播；傳染。3. 交通，交通機關；聯系，連絡（設備）。4. 【宗教】接受聖餐。
  1. Design of switched beam antenna in mobile communication system

    移動通信系統中的智能天線技術
  2. Lc apparatus almost meet all the needs of space optical communication such as weight, size, power consume, life, cost, driving voltage, intergration of optics and electricity, programe, optically take ? over aperture, beam scanning, deflexional range and so on. switches, deflexional facilities and scanning equipments which made with lc have been used in the system of labor in space communication. the only bug of lc apparatus is that their answer speed only get microsecond rate or submicrosecond rate. but it is practical for them to be used in special beam capture, scan, deflexion controling which don ’ t concerned with code rate and code type

    液晶器件幾乎滿足空間光通信的所有大的指標要求如重量、尺寸、功耗、壽命、成本、驅動電壓、光電集成、可編程性、光學接收孔徑、光束掃描和偏轉范圍等等。液晶光開關、光偏轉器、光掃描器已經開始應用於光纖通信的實驗系統中。液晶類器件應用於光通信的唯一重大缺陷，是其響應速度目前只能達到微秒級或亞微秒級，不過，在不涉及到碼型碼率的空間光束捕獲、掃描、偏轉、控制方面，液晶器件完全可能進入實用化。
  3. The paper studies three key problem of base station array antenna for mobile communication, controlled radiation pattern, beam width and passive intermodulation

    本文研究移動通信基站天線中的三個關鍵問題，波束賦形、波瓣寬度、無源交調。
  4. An analysis on improving mobile communication capability by using multiple beam smart antenna

    多波束智能天線對改善移動通信性能的分析
  5. Smart antenna has two critical tasks, one is to filter the uplink signals, and the other is to form the downlink beam, and we need adaptive algorithm and digital signal processing ( dsp ) technology to fulfill these work. adaptive algorithm is one of the most important technologies of smart antenna, and it determines smart antenna ' s speed to the wanted to signal and the complexity of the circuit of the communication system

    自適應演算法是智能天線的核心技術之一，它決定著智能天線對來波信號響應的速率和系統實現電路的復雜程度，系統需要針對各種通信環境來選擇合適的演算法，也可以採用演算法分集的方法來使整個系統工作在最佳狀態。
  6. In the next generation of wireless communication, the base station antenna should have these functions : integration of different diversity methods to release multi - path fading, beam - downtilt to reduce co - channel interference, beam - forming to optimize coverage

    在設計新一代移動通信基站天線時，應使天線能綜合各種分集方式進行天線分集以消除多徑效應，具有波束下傾以減少同頻干擾，能波束賦形以實現優化覆蓋。
  7. They not only have the quality of slow decay, but also narrow beam and focused energy, which are widely used in military and communication

    慢衰減電磁波的衰減比一般電磁波慢，可以實現較大的探測深度；由於它的頻率高，可以實現較高的解析度。
  8. Modern wireless communication systems require imminently the appearance of new - style antennas that have the merits of compactness, cost effectiveness, high gain and self - beam - steering ability

    現代無線通信系統迫切需要緊湊、低成本、高增益、同時具有自波束跟蹤能力的新型天線出現。
  9. Then we introduce the character of the atmosphere channel, which we emphasized on the atmosphere scatter, absorption and scintillation ' s effect on the laser beam. in chapter, we explain why we used cassegrain telescope to collect the optical signal at first, then the lightsource, detector, front amplifier used in optical communication has been compared to that of fiber communication, the noise including shot noise, thermal noise and background light noise has been explained here for analysis the snr and ber in the next section

    在第三章介紹無線光接入系統的光收發單元，採用多孔徑卡塞格倫式的收發天線對消除減小大氣湍流影響有較大作用，針對大氣通道的特點無線光系統收發單元在光源、光探測器、前置放大電路上存在許多有別于光纖通信的技術，同時還闡述了光接收機包括背景噪聲的噪聲機制和接收靈敏度、誤碼率等指標，最後給出了一個整個傳送鏈路的功率預算。
  10. This thesis emphasizes on the research of the theory and experiments of the laser beam propagation in the atmosphere, which are of great importance in the areas of laser radar, laser missile - guidance and communication

    激光束在大氣中傳播的理論及實驗研究，對于激光雷達、激光制導及通信等領域有重要意義。大氣中的湍流對激光束的影響占突出地位，本文著重研究湍流對大氣中傳輸激光的影響。
  11. 1550nm is chosen as the work wavelength, cassegrain transmitting - receiving antenna as the optical antenna of the system through the elucidation of how to choose the work wavelength and optical antenna of comm - unication system. the structure and theoretical design parameter of apt sub - system have been presented through the discussion of the optical signal power estimation of apt sub - system, beam divergence angle, pointing error, and error signal extraction. compared with existed optical wireless communication system, the design scheme proves applicable

    通過對通信系統工作波長選擇、光學天線選擇等闡述，選擇了1550nm作為系統工作波長、卡塞格倫（ cassegrain ）收發合一天線作為系統光學天線；通過對apt子系統功率測算、束散角和瞄準誤差、誤差提取信號等的討論，給出了apt子系統結構和理論設計指標，並將其與現有的光無線通信系統進行比較，說明該設計方案是可行的。
  12. This article systematically compares two major types of beam - forming techniques in adaptive smart antennas for mobile communication systems, i. e., direction - of - arrival based beam - forming and reference signal based beam - forming

    系統地比較了移動通信系統中自適應智能天線的兩大類波束形成技術，即基於來波方向的波束形成和基於參考信號的波束形成。
  13. The spot - beam design in the satellite - based cellular communication systems is discussed mainly

    摘要討論了衛星蜂窩通信系統的點波束設計。
  14. Laser - diode end - pumped solid - state laser has many advantages, including high efficiency, good beam quality, high frequency stability, narrow line width, long lifetime, compact configuration, convenient for using et al. especially, single - frequency solid - state laser sources are required for many fields of fundamental research and scientific application, such as gravity - wave detection, coherent laser radar, coherent communication and fiber sensing

    激光二極體泵浦的固體激光器具有全固態、小型化、效率高、使用方便等優點而受大家的廣泛關注，尤其是實現單頻運轉的全固態激光器以其優良的頻率特性和輸出功率穩定性可廣泛應用在相干信息處理、頻率計量、量子光學、引力波測量和量子信息等研究領域。
  15. Travelling wave tubes （ twt ） are the heart parts of radar systems ， communication systems ， electronic countermeasures ， remote - control & test device ， accurate guidance equipment, etc. as the main component of the beam - wave interaction of a travelling wave tube for producing microwave energy, the solw - wave structure ( sws ) is the key of the twt. it basically determines the performance of the twt

    行波管是雷達、通信、對抗和精密制導等設備的「心臟」 ，而慢波系統作為行波管進行注波互作用激勵微波能量的主要部件，是行波管的核心，其性能優劣直接決定高功率微波源的性能。
  16. On the basis of fbg " working mechanism which is expounded on the approach of mode - coupled theory, the paper analyzes and compares the characteristics of some typical demodulation mechanisms. a novel demodulation mechanism for fbg with a cantilever beam to linearly tunable filtering is designed, and the theoretical and experimental analysis on this demodulation mechanism is explained. although the experiment conditions restrict it, the analysis of the measured data show the mechanism has great effect on the practical applicationjiot only in optical communication and sensor systems

    在使用模式耦合理論詳盡地闡述了光纖光柵工作原理的基礎上，本論文分析比較了幾種典型的傳感解調方案的特點，然後設計了一套新穎的基於懸臂梁線性調諧濾波的光纖光柵解調系統，並對這套系統進行了理論和實驗研究。盡管由於實驗條件所限，最後的實驗結果與實際值稍有差距，仍得到了許多有益的結論。
  17. This is a big complicated monitoring and control system, the article only discusses a part of the units, includes : the components of neutral beam injection and the requirements for monitoring and control system, the argumentation and selection of control scheme, the research of data acquisition system based on pci bus, the design and realization of hardware and software of dac, the means of concentrated data storage and management, the communication program design of subsystem under different mode and protocol. the last part gives some experiment system running data

    這是一個大型復雜的監控系統，本文只就其中的幾個單元的設計與實現展開討論，主要內容包括：中性束注入裝置的組成及其對監控系統的要求，監控系統控制方案的論證和選擇，基於pci總線的小型數據採集系統的研製，多功能數據採集卡的硬體和軟體的設計與實現，集中式數據存儲與管理的方法及其實現，多功能子系統之間在不同通信方式、不同傳輸協議下的通信實現及其程序設計。
  18. Relied on the scientific research fund project of the guangdong communication department : " the application research of high strength concrete in ultra - thin beam bridge ", the double - prestress ultra - thin beam composite structure is presented creatively by my tutor prof. shao xudong in the course of studying the ultra - thin beam bridge

    本文依託于廣東省交通廳科研基金項目《高強混凝土在超薄梁橋中的應用研究》 ，本人導師邵旭東教授在超薄梁橋研究過程中創造性的提出了二次預應力超薄梁組合結構。
  19. Therefore, by exerting controllable atomic array and quantum states, it is possible for physical realization of a quantum computer and the communication of quantum states. it is shown that a negative detuning of the laser field from the atomic resonance will lead to nonzero light pressure forces and reduce velocities along the laser beam axis

    研究結果表明，當選擇負失諧時，原子將受到來自激光場的阻滯力，在它的作用下，原子沿激光束方向的運動速度大大減小，溫度降低，表現為冷卻效應。
  20. Polarizing beam splitter based resonant anomaly and achromatic polarizing beam splitter, narrow - band filters independent of polarization are theoretically designed and analyzed, the optical elements of which are applied widely in integration optics and optical fiber communication

    理論上設計和分析了共振異常型偏振分離器、消色散型偏振分離器和與偏振無關的窄帶濾波器，這些光學元件集成光學、光纖通信等中有廣泛的應用。
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