transmission channel model 中文意思是什麼

transmission channel model 解釋
傳輸通道模型
  • transmission : n 遞送；傳遞；傳達；傳染；移轉；【機械工程】傳動；傳遞；變速器；聯動機件；【無線電】傳送；發射；...
  • channel : n 1 水路，水道，渠，溝；海峽；河床，河底。2 （柱等的）槽，凹縫；【機械工程】槽鐵，凹形鐵。3 〈比...
  • model : n 1 模型，雛型；原型；設計圖；模範；（畫家、雕刻家的）模特兒；樣板。2 典型，模範。3 （女服裝店僱...
  1. Shortwave channel is time varying transmission channel. it has dispersion in frequency and time domains. this characteristics hinds the data transmi - ssion at high speed and the correction of received data. in this dissertation i have analyzed the statistic characteristic of shortwa - ve channel, established the model of shortwave channel and simulated the rayl eigh fading distribution. the technology of spreading spetrum has been proved that it has the capability for anti - multipath and discerning multipath

    在短波通信中，由於通道的時間色散和頻率色散，引起多徑展寬和多徑衰落，前者限制了數據的傳輸速率，後者造成短波數據通信中出現突發錯誤，為了解決多徑效應對短波通信的影響，本文所做工作如下：首先詳細分析了短波通道的統計特性，建立其數學模型；其次分析了擴頻通信的特點，從理論上證明擴頻技術不僅具有抗多徑干擾能力，而且具有分離多徑的能力；介紹了傳統的rake分集合併技術的特點。
  2. Thispaperhasstudiedonthedatalinkinterfacetechniqueoftacticalcontrolsystem. firstof all, functional requirement and the important role of data link interface in tactical controlsystem is introduced ; secondly, with object oriented method, the characteristic of uav taskcontrol process is analysed, and then uav task control information model is established, anddata link interface standard of tactical control system is designed based on this model, including message format and transmission mechanism ; thirdly, data link control module isdesigned based on embedded linux operating system and has realized conversion betweendata link standard interface and the private interface of uav data link ; and then, combinationreal time corba middleware and its event channel, data link control modular componenttechnology is studied, and realization scheme is put forward ; finally, demostration is madebased on prototype of tactical controlsystem, which verify the validaty of data link interfacestandardandembeddeddatalinkcontrolmodules

    本文對戰術控制系統中的數據鏈介面技術進行研究:分析了數據鏈介面在戰術控制系統中的功能需求;採用面向對象的方法，分析無人機任務控制問題，建立了無人機任務控制信息模型，並基於該模型設計了數據鏈介面通信協議，包括報文格式和傳輸機制;基於嵌入式linux系統設計了數據鏈介面控制模塊，實現了數據鏈標準介面與無人機數據鏈私有介面之間的相互轉換;結合實時corba中間件及其事件通道，研究了數據鏈介面控制模塊組件技術，並給出了實現方案;通過戰術控制原理實驗系統的演示實驗，驗證了數據鏈介面通信協議和嵌入式數據鏈介面控制模塊的有效性。
  3. This paper presented a general systematic view, application and current development of the power line carrier transmission technology, and clearly compared some existing power line carrier communication chip with each other. then the authors analyze the channel " s characters of low voltage power line, and formed an abstract carrier channel model. using this as its basis, a new kind of transmission technology is designed that adopted transmission technology combining the spread spectrum modulation with channel coding, which can solve the problems above mentioned to a certain degree, and need not pay for high cost

    文章不僅全面地介紹了電力線載波通訊技術的特點、應用及其發展狀況，還對目前的電力線載波通訊晶元進行了比較；並通過對低壓電網通道特性的分析和研究，抽象出其載波通道模型，在此基礎上，提出了將擴頻調制和通道編碼相結合的傳輸技術用於低壓電力線載波通信，這可以在很大程度上解決電力線的干擾問題，且不必付出高昂的代價。
  4. The practical experiments of the designed intelligent two - wire valve present a good preferment. we model the power - line channel in chapter 4 as the experimental result shows that the power - line channel condition has civilizing influence upon the valve ' s communication performance. here, we establish power - line resistance model base on theory of transmission line

    在實驗中我們發現電力線通道特性的變化對智能二線閥系統的性能有著比較明顯的影響，從研究的系統性出發，同時，也是作為從物理實踐到理論研究的一個重要步驟，我們在第四章中對電力線通道建模和電力線載波通訊進行了模擬研究。
  5. It is necessary in digital communication system that carrier recovery can compensate frequency offset and phase jitter brought by transmission and modulation. this paper is mainly focused on carrier recovery technique. we introduce the channel model at cable headed and receiving site. firstly, we introduce the principle of carrier recovery and give some algorithms of them, which are directed - decision, reduced constellation and frequency sweeping

    本論文緊緊圍繞著數字通信系統中的載波恢復技術，在介紹了有線通信系統所用的調制解調通道模型后，首先闡述了載波恢復技術的思想和基本原理，在此基礎上給出了三種載波恢復演算法，即判決導向演算法、簡化星座判決演算法和掃頻演算法，並且給出了其各自的模擬圖：然後深入研究了一種適合高階qam並且能糾正較大頻偏的載波恢復技術：極性判決演算法。
  6. A simulation and modeling mechanism is studied and proposed for multirate transmission protocol. based on the wlan that adopts ofdm transmission technique, we first assumed that the small - scall fading and multipath in ofdm sub - channel is rayleigh, and large - scale path loss could be described by bi - linearity model, and then we analyzed the rationality

    基於採用ofdm傳輸技術的wlan ，我們假設ofdm子通道的小尺度衰落服從rayleigh分佈，路徑損耗可以用雙線性模型描述，並對假設的合理性進行了分析，將決定速率切換的誤幀率等物理層性能參數和媒質控制協議有機地結合在一起，對多速率傳輸建模進行了有意的探索。
  7. Secondly, basing on single channel if sr receiver mathematic model, this thesis has designed if sr receiver subsystem and brought forward its design project and system circuit principle diagram, and explained the system working principle. furthermore, this thesis introduces the working principles and respective applications of wideband high - speed adc ad6640, ddc ad6620 and high - speed dsp tms320c6713 according with the if sr receiver subsystem high - speed analog digital conversion department, digital down conversion department and high speed digital signal processing department. thirdly, the thesis emphatically demonstrates the software realization department of the if sr receiver subsystem, which including ad6620 ' s inner parameter software setup, tms320c6713 data transmission and processing and the quadrant demodulation algorithm program realization

    其次，基於單通道中頻軟體無線電接收機數學模型，本文設計了中頻（ if ， intermediatefrequency ）軟體無線電接收機子系統，給出了中頻軟體無線電接收機子系統的設計方案和系統電路原理圖，說明了系統工作原理，並分別對應系統中的高速模數轉換部分、數字下變頻部分、基帶數字碩士學位論文軟體無線電理論研究及中頻軟體無線電接收機子系統設計信號處理部分，介紹了高速adcad664o ，數字下變頻器（ ddc ， digitaldownconverter ） ad6620 ，高速數字信號處理器（ dsp ， digitalsignalproeessor ） tms320c6713的工作原理，以及它們在中頻軟體無線電接收機子系統中的應用。
  8. Common data interfaces used in radio include rs - 232, etc. as the rapid growth of data speed in data radio, asynchronous serial port does not meet the need of data transmission of high - speed data radio. data radio is gradually using ethernet interface as high - speed data radio ’ s data interface, to function as a high - speed data channel between host computer and data radio. this paper brings forward a universal radio interface protocol model, whose core is taking ethernet as a high speed data channel in network protocol stack

    本文針對電臺的以太網介面，經過對各種電臺的功能分析，提出了一種通用的在以太網通信中適用的報文介面協議模型，其核心思想是將以太網作為網路協議棧中內部的高速數據傳輸通道來使用，作為鏈路層和物理層之間的內部介面，同時提供電臺控制和數據傳輸兩大功能模塊。
  9. The author considered great numbers of transmission characteristics of real channel in lms model and properly simplified it according to requirement in the project. the key characteristics in the model include multi - path fading, shadow fading, doppler shift, propagation noise, multi - path delay and and state transform of three status homogeneous markov chain described by lms model, etc. the key characteristics of channel are properly collocated and made to be the evidence theory of hardware implementation

    Lms模型考慮了大量的實際通道傳輸特性，結合課題需求，實現過程中對lms模型做了適當簡化，考慮了其中的多徑和陰影衰落、多普勒頻移、傳播噪聲、多徑延遲以及lms模型所描述的三狀態齊次markov鏈的狀態轉換等，對其所描述的主要通道特性適當組合，以此作為硬體實現時的理論依據。
  10. The thesis makes and works as follows : at first, established the mobile channel model, through the analysis of the mobile channel characteristics ; the second, proved the advantage of ofdm througth comparing several parallel technologies, and implanting the ofdm technique in the mobile communication system modulator ; then, this thesis gived the baseband transmission architecture of ofdm mobile communication system and established the model of ofdm mobile communication system. at last, the thesis gives a brief introduction of the design of the hardware platform for the wireless communication system as well as the data transmission flaw

    以下是本文所作主要工作：通過分析移動通道的特性建立了移動通信系統通道模型； ofdm技術與傳統的并行傳輸技術相比，具有很大的優勢，結合建立的移動通道模型，將此技術應用在移動通信系統之中；在對ofdm技術基本原理進行分析的基礎上，對ofdm移動通信系統進行建模與模擬分析：最後，給出了詳細的ofdm移動通信系統發射機和接收機的原理框圖，提出了一套基於dsp & fpga的ofdm移動通信系統硬體平臺設計方案。
  11. A var model is used to study the effects of monetary shocks in the united states, the united kingdom, japan and korea, and to compare their monetary policy transmission mechanism. the results suggest that in developed market economy countries, monetary policy is mainly transmitted by price ( interest rate ) channel ; while in emerging market economies, the transmission mechanism is uncertain in the transformation process from quantity channel to price channel

    運用矢量自回歸（ var ）分析方法，對英國、美國、日本和韓國等國貨幣政策傳導途徑進行了比較分析，認為在成熟的市場經濟國家，貨幣政策主要通過價格（利率）途徑傳導，而在新興市場經濟國家，貨幣政策傳導機制處于從數量渠道向價格渠道轉型過程中，具有較大的不確定性。
  12. Then the important reference are provided for the optimal system design and technical parameters selecting of long - range underwater acoustic information transmission system. 2. the underwater acoustic channel model based on ray theory is studied, and in combination with the system function of coherent multi - path channel, the method for underwater acoustic channel response prediction through eigenrays finding is obtained

    研究了基於聲線理論的水聲通道聲場模型，分析並模擬了在多種不同聲速條件下的聲線傳播以及不同海底狀況下的聲傳播；結合相干多途通道的系統函數，通過求取本徵聲線進行了水聲通道響應的預測。
  13. Based on the two ex isting underwater acoustic channel models ( the rice model and the rayleigh model ), we simulated the effects on the image signal underwater transmission with different ofdm parameters. by selecting appropriate ofdm parameters, we realize a simple offline communication system. besides, parts of programs based on ti tms320c62x are realized in this thesis

    本研究先根據現有的兩類水聲通道模型（萊斯衰落模型和瑞利衰落模型） ，藉助于計算機模擬，詳細考察不同的ofdm參數對于圖像信號水聲傳輸的影響，然後根據模擬的結果，選擇適當的參數實現了一個簡單的脫機（ offline ）通信系統，最後在ti公司的tms320c62x上實現部分相應的通信模塊。
  14. And key elements of channel modeling are small - scale fading and multi - path transmission model. therefore the generating principles, statistical characteristics and simulation methods are intensively analyzed and discussed

    而小尺度衰落和多徑傳播模型又是通道模型的難點與重點，所以本文對其產生原理、統計特性和模擬方法進行了深入的分析與探討。
  15. Some related res ults have been acquired after comparing these cdf with the theoretical capacity. in the fourth chapter, it was at first estimated all the channel coefficients by maximum likelihood estimation and minimum mean square error estimation method on the basis of the construction of the transmission frame and the mathematical model for the wireless mtmo system of channel estimation with training sequence

    第四章首先基於訓練序列估計的無線mimo傳輸幀結構和數學模型，分別使用最小均方誤差估計法和最大似然估計法估計出了通道的各個系數，在小信噪比和大信噪比時，比較了兩種估計方法的估計誤差的方差。
  16. We designs a communication protocol on this model, implementing many functions between host computer and radio, such as data transmission, radio management and control, status advertisement, etc. this paper uses the interface protocol, designs a radio link layer protocol, and implements the driver for the radio in linux operating system. after testing and measurement, we conclude that this interface protocol can be a model which uses ethernet interface as a transparent data channel

    本文使用了此介面協議，設計了無線鏈路協議，並且在linux操作系統中以電臺驅動程序的方式實現了介面和鏈路協議，通過對驅動程序運行情況的測試，說明該介面協議對網路層協議而言屏蔽了以太網作為透明通道的事實，此協議介面模型的可以實現和完成既定的功能和目標。
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