無干擾通道 的英文怎麼說

中文拼音 [wúgānrǎotōngdào]
無干擾通道 英文
clear channel
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 干 : 干Ⅰ名詞1 （事物的主體或 重要部分） trunk; main part 2 （幹部的簡稱） short for cadre Ⅱ動詞1 （做...
  • 擾 : Ⅰ動詞1 （擾亂; 攪擾） harass; trouble 2 （客套話 因受人款待而表示客氣） trespass on sb s hospital...
  • 通 : 通量詞（用於動作）
  • 道 : Ⅰ名詞（道路） road; way; route; path 2 （水流通過的途徑） channel; course 3 （方向; 方法; 道理） ...
  • 通道 : thoroughfare; passageway; pass; enterclose; gallery; drong; tunnel; avenue; alure; way; row; key ...
  1. As a combination of ofdm with space - time coding technique, mimo - ofdm becomes more and more important in the future wireless communication systems, the mimo - ofdm system can not only effectively enhance the transmission rate and capacity of the wireless communication system but also greatly mitigate the effections of mufti - path fading and interfere

    Mimo - ofdm技術將ofdm與空時編碼技術有機的結合在一起，能夠大幅度的提高無線通信系統的通道容量和傳輸效率，並能有效的抵抗多徑衰落、抑制干擾和噪聲。
  2. The wireless channel based on spread spectrum modulation can assure the digital video signal communication safe and withstanding the high noise disturbing condition

    而基於擴頻技術的無線通信通道，為視頻的傳輸提供了保密及抗干擾性能強等優點。
  3. The future wireless mobile communication systems are expected to provide ubiquitous, high - quality, and high - rate mobile multimedia transmission. however, hostile multipath fading radio conditions give rise to serious inter - symbol interference ( isi ) ; even worse, wireless channel are often time varying, which makes the system more vulnerable and more difficult to track the channel state. orthogonal frequency dvision multiplexing ( ofdm ), which is inherently resistant against isi, has invoked a popular research interest in recent years, and has been a promising candidate technology of the physical layer for future weideband high - date - rate wireless communications. notwithstanding, ofdm is much more vulnerable to errors of both time and frequency synchronization and to that of channel estimation, and how to obtain correct timing and channel estimation efficiently is highly critical to ofdm systems. the dissertation will focus on both of the aspects of ofdm systems mentioned above

    但是無線環境的多徑特性造成通信系統中嚴重的符號間干擾，同時無線通道的時變性使得通道特性跟蹤復雜。而正交頻分復用技術（ orthogonalfrequencydivisionmultiplexing ， ofdm ）正是一種解決符號間干擾的有效傳輸手段，因此ofdm技術作為未來寬帶高速率無線通信的物理層候選技術在當前引起了一股研究熱潮。但ofdm系統對定時同步誤差和通道估計誤差非常敏感，如何在ofdm系統中準確快速地實現符號同步和通道估計是至關重要的，本論文將重點針對這兩個問題進行討論。
  4. In the system, the low voltage power line is the first signal tunnel without any other relay equipments between customer terminal and substation collector, public telephone line serves as the second signal tunnel between substation and management center computer. as a breakthrough of conventional concept of electricity meter, this thesis initiate a new concept, namely, intelligent power customer terminal ( shortly, customer terminal ), which is developed with spread spectrum plc communication functional and possesses many advanced functions, such as, in addition to electric energy acquisition, guarding against electricity pilfering, preventing wrong connection, protecting malfunction, remote communication ( for example, remote power supply or halt, remote configuration of electricity meter, remote load control, etc ), and so on

    本文首先系統地總結了目前國內外低壓電力網數據傳輸技術的研究現狀和存在的問題，在此基礎上，從理論上論證了在低壓電網上應用擴頻載波數據通信技術的可行性和優越性，並重點論述了擴頻載波技術抗電力線噪聲干擾的機埋；本文提出了一個新穎的基於低壓電力線擴頻載波通信技術的集中遠抄系統的總體方案，即由用戶終端、集中器和電能管理系統所組成的網路系統，其中，用戶終端到配變集中器用低壓電力線作為通道，中間無需其他硬體中繼設備，集中器到電能管理系統用公用電話網作為通道。
  5. The high - altitude, long - endurance ( hale ) unmanned aerial vehicles ( uav ) is used to carry out high reconnaissance or to head off missiles

    高空長航時無人機主要執行戰略偵察監視任務，也可用於空中預警、通訊中繼、電子干擾、戰區彈道導彈的攔截。
  6. Simulation results show that abf - csma / ca protocol can realize space - division - multiple - access ( sdma ) and provide very high channel utilization. chapter 3 considers employing smart antennas in the central access point ( cap ) of wireless internet access networks

    第三章研究了智能天線在internet無線接入網路中的應用，主要考慮使用智能天線對抗同通道干擾與多徑衰落，增加覆蓋范圍，並在mac層實現智能天線與網路的有機結合。
  7. We studied many methods to improve the tcp / ip in wireless environment, such as tcp / ip initial slow start algorithm, initial window and retransmission time out ( rto ) estimate. finally, we consider the round - trip time ( rtt ) with the physical layer and the transfer layer combined together. physical layer using rtt related to the channel state and transfer layer using the constant rtt, the interference between the two layers can be eliminated, and so the effectiveness of the wireless data link can be enhanced

    研究了tcp ip的慢速啟動演算法、初始窗口、重傳超時估計以及改善無線tcp ip性能的各種方法，提出了一種把物理層鏈路和傳輸層相結合處理往返時間（ rtt ）的方法：物理層鏈路採用與通道相關的動態rtt ，傳輸層採用常數rtt ，消除了兩層rtt之間的相互干擾，從而提高了無線鏈路的利用率。
  8. One important feature of radio signals ’ is that the signals are easy to catch and to disturb. in order to disturb the radio signals, parameters, including code rate, modulation, protocol, protection methods and channel coding, about satellite ’ s signals should be known. so, it is possible to receive the data from satellites and obtain lots of information from it, and even to destroy the undesired information

    衛星通信系統的遙控遙測信息都是通過無線通道傳遞，而無線電信號的一個很重要的特性就是發射易被接收、易被干擾，實現干擾的前提是對衛星信號參數的極大了解，這包括明確信號的碼速率、調制方式、所用協議、保密措施及通道編碼等，因此，通過接收衛星數據以獲取大量的未知信息，甚至破壞掉對己的不利信息就成為可能。
  9. We also select the microchip pic16f877 made by microchip co. ltd as a control chip to realize micro - computer control. this system use three separate channel to find out the " across the zero point " of each back - emf. the program use digital filter to wipe off the pwm interferences and the commutating interferences

    系統中採用三個獨立通道分別檢測無刷電機三相繞組的反電勢的各自過零點，同時在軟體中採用數字濾波以消除其它噪聲干擾，使檢測電路檢測到的反電勢過零點更加準確可靠，實現了對五位置傳感器直流無刷電機的數字控制。
  10. In mobile communication and high - speed wireless digital communication, multi - path, the finity of channel bandwidth and faultiness of the channel, lead to the bringing of intersymbol interference ( isi ) when data transfer. this is an important factor that degrades the performance of communication. however channel equalization technique can eliminate the isi and noise, it can also reduces the bit error ratio

    在移動通信及高速無線數據通信中，多徑效應和通道帶寬的有限性以及通道特性的不完善性導致數據傳輸時不可避免地產生碼間干擾（ isi ） ，成為影響通信質量的重要因素，而通道的均衡技術可以消除碼間干擾和噪聲，並減少誤碼率。
  11. According to request that military put forward, the target car that subject research should have such characteristics as remote control, high precision, good safeguarding, needing no track, etc, so as to achieve purpose of course require correctly when training to carry on cannon static to static, static to move, move to static, move to move etc. target car transfer speed require low inertia, high accuracy, high dependability, stupid and getting excellent and kind systematically ; wireless communication system expect much dependability, better anti - interference ability ; computer control system demand and try one ' s best to adopt advanced technology, components and parts source of goods reliable, high dependability, structure to be simple, have serial communication, digital display, systematic trouble examine and function of showing etc. the job of this thesis is divided into three major parts : the proposition and confirming of the electric power pulls, specification requirement and selecting type of equipment of communication system, sureness of the computer control system scheme

    根據軍方提出的要求，本課題研製的遙控坦克靶車應具有遙控、精度高、維護性好、無軌道、自帶動力等特點，以達到訓練時進行火炮或導彈靜對靜、靜對動、動對靜、動對動設擊等課目的要求。靶車調速系統要求低慣性、高精度、高可靠性、魯棒性好；無線通訊系統要求高可靠性、抗干擾能力強；微機控制系統要求盡量採用先進技術、元器件貨源可靠、高可靠性、結構盡量簡單，具有串列通訊、數字顯示、系統故障自檢及顯示等功能。本文的工作分為三大部分：電力拖動方案的提出及確定、對通訊系統的技術要求及設備選型、微機控制系統方案的確定。
  12. On the conditions that there is no criterion for protecting signal cable for urban rail traffic engineering, the author systemically analyzes the present situation and presents suggestions on signal cable protection methods from aspects of the property, origin of the electro - magnetic interference and the theory of electro - magnetic field, and finally the author puts forward some problems to be solved in signal cable protection in the future

    摘要針對目前城市軌道交通工程中，信號電纜防護無規范的現狀，從城軌電磁干擾的性質、來源和電磁場理論系統地進行了分析，提出了信號電纜防護措施的建議，並指出在電纜防護中需進一步解決的問題。
  13. In the construction of unmanned substations, shaoguan power bureau took a series of measures to minimize substation telesignalling misoperation and dithering, thus ensuring the reliability of information transmission through channels and improving interference rejection of substations

    韶關電力局在無人值班變電站的建設中，採取了針對性強的一系列技術對策和改進措施，使變電站遙信誤動、抖動減少到最低程度，保證了通道信息傳輸的可靠性，提高了變電站的抗干擾能力。
  14. Simulator presented in this paper provides a direct interface for the test of shortwave communication system, which well represents various features of hf channel such as multi - path delay, rayleigh fading, doppler shift, doppler spread, gaussian noise and impulsive interference, etc. in order to realize the channel simulation for the intermediate frequency signal, we, inspired by the idea of soft - defined radio, bring forward a new design method that the channel simulator consists of several dsp chips

    本文研製的模擬器提供介面直接對短波通信系統進行測試，能夠全面反映短波通道的多徑時延、瑞利衰落、多普勒頻移、多普勒擴展、高斯噪聲和脈沖干擾等特性。為了實現對中頻信號的通道模擬，開發出一個結合軟體無線電思想的由多個數字信號處理晶元構成的短波通道物理模擬器。
  15. Stfs is a good coding arithmetic which is simple and easy to realize. moreimportantly stfs has higher diversity order and encoding gain than sts at the samesymbol rate. it can repel channel fading, improve data rate and wireless systemcapacity availability, stand against frequency selectivity fading, eliminate theintersymbol interference

    該編碼演算法不僅在方法和原理上簡單，而且易於實現，在相同符號率下比空時擴頻具有更大的分集度和更高的編碼增益，能有效抵抗通道衰落、提高數據速率、提高無線系統容量、很好的對抗頻率選擇性衰落和消除符間干擾。
  16. As a combination of ofdm with space - time coding technique, mimo - ofdm has recently received considerable attentions, which can not only effectively enhance the transmission rate and capacity of the wireless communication system but also effectively combat multi - path fading and interfere

    Mimo - ofdm技術將ofdm與空時編碼技術有機的結合在一起，能夠大幅度的提高無線通信系統的通道容量和傳輸速率，並能有效的抵抗多徑衰落、抑制干擾和噪聲，從而引起了通信界的廣泛關注。
  17. Wap is designed to adapt to the bounds of wireless networks ( such as low bandwidth, high latency, less connection stability and so on ) and the bounds of wireless device ( like limited input facilities, limited battery power, limited display, memory and cpu )

    它的提出和設計充分考慮了無線通道的固有特點（如通道穩定性差、衰減干擾大、帶寬窄、時延大） ，以及無線終端處理能力有限，輸入方式和屏幕受限制的問題。
  18. Ofdm signals have efficient spectral bandwidth, and the performance of the ofdm system against multipath fading is better than that of the single carrier modulation system

    此項技術具有較高的頻帶利用率，並且與單載波調制技術相比可以更為有效的對抗無線通道中的多徑干擾。
  19. Multi - path fading and doppler shift of wireless mobile channels would generate interference to signals, as a result, waveform of the received signal would be distorted, and channels would be interrupted if the interference is severe

    無線移動通道的多徑衰落和多普勒頻移會對信號產生干擾，導致接收信號波形失真，嚴重者會造成通信的中斷。
  20. In mobile communication, the multi - path of channel brines the inter - symbol interference ( isi ) which cna make the ber of system larger. a technology called adaptive equalizer combined with adaptive array antenna is researched. this technology is used in the base station to restrain isi, and it is realized through landscape orientation filter, whose weight vectors are formed by rls algorithm. the result of computer simulation showe that the ber performance of system is good enough to ensure the requirement of communication

    在移動無線通信中，由於傳輸通道的多徑性質，會在接收端引起碼間干擾，使系統誤碼率變大，結合智能天線系統研究了一種自適應均衡技術，在基站一端使用，用來抑制碼間干擾，它通過橫向濾波器來實現，通過rls演算法自適應地產生加權因子.計算機模擬的結果可以證明，使用無衡技術后，系統的誤碼性能可能滿足通信需要
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