短通道 的英文怎麼說

中文拼音 [duǎntōngdào]
短通道 英文
jitty
  • : Ⅰ形容詞(空間、時間兩端之間的距離小) short; brief Ⅱ動詞(缺少; 欠) lack; owe Ⅲ名詞1 (缺點) we...
  • : 通量詞(用於動作)
  • : 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. The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar

    電離層是隨機時變,各向異性,非均勻、色散的復雜介質。為了保證依賴于電離層進行的信質量,必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與信或高頻天波雷達相關的天波傳播的狀態,對信和天波雷達工作起了重要的輔助作用。
  2. The archipelago is a hazardous traffic median in the great circle route, the shortest path between ports on either side of the north pacific

    多島海域是大圓航線上極具危險的運輸中樞,也是連接北太平洋各端港口的最短通道
  3. Research on access token management for hf channel

    接入令牌管理策略的研究
  4. Finally, with the optimized chaos sequences, the results of software simulation on vhf - rc indicates that ds - ss outbalances the bpsk system without spread spectrum due to ber and the ds - ss with kent sequence is better than the one with golden sequence in some extend

    最後本文對數字混沌序列進行了優選,在超波中繼模型上的模擬結果表明混沌直擴信相比于非擴頻的bpsk信在誤碼率方面明顯較低;相對于線性擴頻碼( gold序列) ,同樣誤碼率較低。
  5. 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

    信中,由於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,後者造成波數據信中出現突發錯誤,為了解決多徑效應對信的影響,本文所做工作如下:首先詳細分析了的統計特性,建立其數學模型;其次分析了擴頻信的特點,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。
  6. Thereafter, the applications of go sequences in single - cell s - cdma systems are discussed in this thesis. in additive white gaussion noise ( awgn ) channel, interference components in s - cdma systems accommodating more users than the spreading factor is analyzed based on the theoretical bound of the periodic correlation mean square property. then two interference - suppressed s - cdma system models of augmented capacity are proposed, along with the analysis and simulation results

    在加性白高斯噪聲( awgn )條件下,以序列集周期相關均方特性理論界為基礎,對序列個數大於系統擴頻因子的s - cdma系統干擾組成進行了分析,並基於截wh序列提出了兩種高容量低干擾s - cdma系統模型,給出了分析和模擬結果。
  7. According to the characteristic of hf channel, the watterson model which was ccir recommended was made

    首先從的特性分析入手,建立了基於ccir建議的watterson模型的模型。
  8. In this paper, besides the simulation of the normal physiological condition, ecg waveforms under pathological conditions due to cell membrane ionic channel mutation such of as long - qt syndrome, short - qt syndrome, t wave alternans and brugada syndrome also be simulated and researched, which validated this ecg model, at the same time be beneficial to further research on

    文中除了模擬正常生理狀態下的心電圖以外,對長qt間期綜合癥、qt間期綜合征、 t波電交替和brugada綜合癥等幾種由細胞膜離子改變所引起的病態心電圖波形也進行了模擬研究,充分驗證了模型的正確性,同時也為進一步在此上進行疾病治療藥物的研究奠定了基礎。
  9. The adaptability of the different structure of equalizer to hf channel characteristic were analysized

    分析不同均衡器結構對于的適應性。
  10. The combination of negative electron affinity ( nea ) photocathode and micro channel plate ( mcp ) brings the iii image intensifier. because of its high performance, the iii image intensifier has been developed rapidly and used widely in the short several decades after it had been found

    負電子親和勢( nea )光電陰極和微板( mcp )的結合產生了三代像增強器,由於這類像增強器具有優良性能,在發現后的數十年中獲得了迅猛發展和廣泛應用。
  11. In modern shortwave communication, the length of signal existence time in single channel is very short for reducing the probability of being intercepted, thus the difficulty of signal detection and extraction increased

    摘要在現代信中,作為低截獲率信手段之一,單個內信號持續時間大大縮,從而增加了信號檢測與提取的難度。
  12. Tv announcement - red and green channel system

    電視宣傳片-紅綠系統
  13. On the basis of computer simulation, the relationship among plasma channel, plasma configuration and the final crater are clarified

    根據計算機模擬實驗,得出了、長脈沖加工時瞬時放電半徑、放電位形半徑以及最終放電痕半徑三者之間的關系。
  14. The secondary air duct of boilers is a group of large diameter short ducts in parallel connection, having inlet air flow condition with inner positioned resistant pieces

    摘要鍋爐二次風為有內置阻力件的一組並聯大口徑短通道,其阻力系數嚴重偏小而且風門渦流強烈,從而造成二次風強烈脈動。
  15. This thesis analyzed the error performance of mfsk and mpsk modulator in hf with optimal receiver, studied the shortcoming and strongpoint of several typical short - wave data transmission systems and their performance over fading and intersymbol interference channels. the theory and key technical of adaptive modem is discussed. in the last, an efficient modulation scheme - block coded modulation is introduced into hf radio systems to improve the efficiency of hf data transmission, this paper also proposes a hf data transmission system scheme composed of a block coded modulator and a decision feedback type adaptive equalizer

    本文在對波數傳兩種常見調制方式fsk及psk最佳解調性能分析的基礎上,討論了幾種採用典型調制技術的波數傳系統(如時頻調制、多進制頻移鍵控慢跳頻、 chess系統)原理、優缺點以及抗衰落和抗符號間干擾的性能;分析了自適應串列數傳系統抗衰落和多徑干擾的原理、關鍵技術;在本文的最後引入一種有望解決波數傳系統低效率狀況的調制方式bcm -分組編碼調制,給出了一個採用bcm技術與自適應均衡技術相結合的波數傳系統方案,並過計算機模擬進行了初部驗證。
  16. In a tdma network, multiple users share the common medium ( or channel ) and bandwidth but different intervals of time. in case of the burst mode, the carrier of the modulated signal needs to be synchronized in a very short time. the common approaches such as a costas - loop and so on are no longer suitable any more

    在一個時分多址( tdma )信網路中,多個用戶過不同的時間段共享一個傳輸線路(或者)的帶寬資源,每個用戶只能在分配給自己的時間段內進行信,這種突發方式信號的解調要求載波恢復要在很的時間內完成,我們以往在連續信號解調器中採用的costas環等方法很難適應這種要求。
  17. Then in allusion to biased momentum wheel system, based on classical control system a pid controller was design about pitching channel. according to specialty of roll - yawing channel, this paper discuss long - time cycle movement and short - time cycle movement. when design the control method of long - time cycle movement, whiff thruster is used to assistant the control system. when design the control method of short - time cycle movemen, in order to sovle the problem of coundn ’ t abtain the angular velocity signal, nonminimum phase controller advanced by terasaki is used

    然後針對偏置動量飛輪系統,基於經典控制理論設計俯仰的pid控制律,根據滾動?偏航耦合的特點,分別討論了由軌角頻率和章動頻率引起的長周期運動和周期運動。其中長周期運動控制律設計時,結合了噴氣推力控制來輔助偏置動量控制;周期運動控制中,為了解決不能獲得角速度信號的問題,採用terasaki提出的非最小相位控制器進行控制。
  18. Secondly, introduce discrete multi - tone modulation principle in detail, have a systemic and comprehensive analysis and explanation on minimum mean square error ( mmse ) channel shorten time domain equalizer design methods which are based on all kinds of cost functions, analyze their advantage and disadvantage. research on time domain equalizer structure, compare all the time domain equalization algorithm with simulation which afford a valuable reference for the choice of equalization algorithm and equalizer structure when design time domain equalizer

    詳細介紹離散多音頻調制原理,對mmse法和基於其他代價函數的時域均衡器設計方法的進行了系統全面的分析和闡述,分析了各自的優缺點;對時域均衡器結構進行研究;模擬比較了各種時域均衡方法,為進行時域均衡器設計時均衡演算法、均衡器結構的選擇提供了有價值的參考。
  19. The underwater - radio buoy for use as obtaining the ocean " s acoustical parameters is a underwater acoustic signals record system which has long distance radio remote control and data transmit function. the technology key of the dissertation study is that under the requirements of the system the monitor and record equipment on the acoustic source vessel, the monitor and record equipment on control vessel command and control the work slate of the buoy system by radio data transmitting mode of short wave transmitter - receiver

    海洋環境參數獲取浮標監測系統屬于具有長距離無線電遙控?數傳功能的水下聲信號接收記錄系統,本論文研究目標的技術關鍵在於根據系統要求,指揮船和發射船監控記錄設備波電臺以無線數傳方式,對浮標系統的工作狀態進行指揮和控制,浮標則過同一向指揮船上報浮標方位、工作狀態、關鍵數據及非常狀態下的報警信號等。
  20. In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition

    本文首先概述了自編碼擴頻信的原理、自編碼擴頻序列的產生方法及其特性和擴頻信系統編碼同步的理論,然後針對自編碼擴頻信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼,並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲、瑞利衰落和多址干擾情況下進行了模擬,分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下,可以獲得較的捕獲時間和較大的捕獲概率。
分享友人