擾碼器 的英文怎麼說
中文拼音 [rǎomǎqì]
擾碼器
英文
scrambler-
Scrambler - a device that electronically alters a program signal so that it can be seen only by persons, typically paid subscribers, with appropriate decoding, or " descrambler " devices
擾頻器-此電子設備可以改變一個節目的信號，只有在正確的解碼或安裝正確的裝置時，才能被特定人群收看，特別是付費訂戶。I remember one of the reporters asking me about our tasks back then, and my answer was fairly simple as our missions were all “ clean ”, like guarding ministries and banks from robbers ( with the exception of those of gilded machine guns and antiquities ), and also collecting weapons from the many abandoned military barracks and bases of the ex - iraqi army, also the supervision of arms demolishment and vehicle dismantling in pre - made dumps, and lastly supervising the training of officers and soldiers of the new security forces
記得有記者問我關於我們今後的任務是什麼，當時我的回答是相當簡單的，因為我們的任務都「搞定」了? ?像護衛政府部門和銀行，使其不受劫匪騷擾（那些鍍金機槍和古物除外） ，從舊伊拉克軍隊的許多廢棄軍營和基地里收集武器，同時監督武器的銷毀和預先碼放拆解前的車輛，最後還有督導新安全部隊官兵的訓練。By calculating parameters including the link length, the azimuth angle, the elevation, the optical power that the inter - satellite optical cdma communication system will receive, the variation range of the azimuth angle and the elevation from the optical antenna of atp are understood well. by analyzing the factors to impact bit - error - rate ( ber ) from the received power, multi - user disturbing, background noise, wavelength, bit rate etc, measures to guarantee high performances of the system are obtained, especially those for smoothing the fluctuation of the received optical power from host platform vibration
分析研究了衛星光cdma通信系統中衛星仰角、方位角和距離，給出了探測器能夠接收到的光功率以及atp子系統捕獲及跟瞄的范圍;對衛星光cdma通信系統性能模型和基於衛星振動系統性能模型的研究，分析了多用戶干擾、接收光功率、背景光噪聲、振動偏差以及碼速率對系統誤碼率的影響，給出了相應的改進措施。Our object is an intermediate frequency modem of a software defined radio transmitter - receiver of multi - service, multi - modulationmode and multi - processdatarate. first, related software defined radio theory is introduced ; later, channels of transmitter - receiver are designed with consideration of data format, modulation, fec, interwaving. and scrambling ; emphasis is placed on theory and implementation of an audio compression algorithm cvsd ( continuous variable slope delta modulation ) and a fec technique convolutional coding - decoding
本文首先介紹了相關的軟體無線電理論；然後完成了包括數據格式，調制方式，糾錯碼方式，交織器和擾碼器等部分的中頻數據機通道設計；接著著重介紹了系統中使用的音頻壓縮演算法cvsd （連續可變斜率增量調制）的原理和實現，以及作為前向糾錯碼的卷積碼編碼理論和編解碼的高效實現。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通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通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;在加性白高斯噪聲通道、瑞利衰落通道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，可以獲得較短的捕獲時間和較大的捕獲概率。Based on the realization of the encoder / decoders, this scheme aims at the highest rate downstream frame, and has realized the parallel fec circuit and scrambler complying with the protocols and maken a simulation. the fprme decoder is advanced in the world. the parallel fec circuit completely conforms to the itu - t protocols, and has important practical value
在rs （ 255 ， 239 ）硬體編碼器/解碼器實現的基礎上，本文按照gpon協議要求，針對gpon中最高速率2 . 488gbps的下行幀，通過設計復雜的操作時序，實現了符合協議規定的32位并行fec編解碼和解擾碼電路，並作了模擬。Continuous single tune jamming is an effective jamming to linear frequency - modulated radar. however it can not suppress signal output after being full of the sidelobe suppress filter of the jammed bi - phase coded radar, no matter how great the power of it may be
單頻正弦波干擾對線性調頻雷達是一種有效干擾，但對於二相編碼雷達無論具有多大的功率在充滿二相編碼雷達接收機的旁瓣抑制濾波器后也不能壓制信號主瓣，因此是一種無效干擾。The emphasis of the thesis is base - band signal shaping and programmable interpolation algorithm. we introduce the basic theory of base - band signal shaping, and the effect of the digitizing of the ideal raised cosine rollof signal g ( t ) is attentioned. the shaping filter parameters are determined based on the system specifications, and the simulation results are given
首先從降低鄰近碼間干擾原則出發，討論了基帶成形的基本原理與升餘弦滾降濾波器的時頻特性，重點分析將理想的滾降波形g （ t ）數字化后對頻譜的影響，並且根據系統指標，確定了各項參數，給出了具體的設計舉例和模擬結果。Several important factors like the bandwidth compression efficiency, isi caused by filter and the affection on system performance that arise from filtering should be considered
該方案需要考慮到濾波器的帶寬壓縮效率，濾波器引起的碼間干擾，濾波器對系統誤碼性能的影響等幾個關鍵因素。We can reduce the isi and noise by elaborately designing transmitting filter and the receiving filter when the channel is known and unaltered. however, the factual channel is time - varying and not known entirely. so the isi is always existent
在通道特性已知且恆定的情況下，通過精心設計發送和接收濾波器就可以消除碼間干擾和使噪聲的影響最小，但實際通道既不可能完全知道，也不可能恆定不變，系統碼間干擾總是存在。Firstly, the effects of short - delay multipath to the dll, pll, and snr of receive signal are discussed. then the effects of multipath to multiple closely spaced antennas are presented. and solve the problem by promote a new method based on extended kalman filtering, which utilize the correlation of measure data of dll, pll and snr of each antenna
最後，利用小范圍多天線系統中多徑信號對接收機碼環、載波環及信噪比影響的相關性，提出了基於擴展卡爾曼濾波器的多徑干擾抑制技術，解決了近距多徑信號的抑制問題。We analyzed the anti - jam and band inside anti - interfere performance of the system, and the low probability intercept ( lpi ) of the traditional direct sequence spread spectrum ( dsss ) modulations in the uav platform ' s applications. so a new modulation technique using a multi - level pseudo noise ( pn ) code has been presented. the new multi - level pn code is built from a high speed pn code through a low passed filter ( lpf )
分析了系統抗阻塞式干擾和抗帶內頻帶干擾的性能，以及常規bpsk qpsk - dsss調制在無人機通信中存在的安全隱患，提出了一種用多電平pn碼進行擴頻調制的方法：採用高速pn碼，經過低通濾波器，產生多電平pn碼進行直序擴頻調制，能在低信噪比情況下有效抵抗平方率檢測器對系統載波的檢測。Secondly, we apply tk operator to the cross - correlation of received signal code and pn code to separate the multi - paths. it comes to a conclusion that tk operator can separate the multi - paths within less than the chip period accurately of spread - spectrum system with space - modulation by simulation. at last, we apply this algorithm to the practical signal collected by gps tap, and from the result we can drop a conclusion the tk algorithm is practical
本文首先闡述了時空調制擴頻信號原理以及在多徑干擾下時空調制接收機的性能和teager - kaiser接收機的原理;接著對時空調制擴頻系統的解調信號與偽碼的互相關函數採用tk接收機進行多徑分離，模擬結果表明， tk接收機對時延在一個碼片內的時空調制擴頻通信多徑信號有很好的分離效果;最後用數據採集器對一個gps信號進行接收和多徑的估計，驗證了該演算法在實際的運用中對多徑的擴頻信號有很好的分離效果。The evrc vocoder is varialbe rate, the maximal encode rate is skbps, its voice quality is closed to qcelp - 13k, and has better ability of anti - disturbance
Evrc聲碼器是可變速率的，最大編碼速率為8kbps ，在話音質量上接近於qcelp - 13k的語音編碼器，且具有更好的抗干擾能力。It consists of two part, the one is hardware : integrating the system of the arc welding robot ' s hardwares and its working principles, separating and extracting the original system ' s control signals, designing the control system openly and its working principles, constructing the structure and principle of the motion card based on dsp, designing the telecontroling teaching box or control panel of touching screen based on usb interface, applying for some software and hardware measures on control system ' s anti - jamming ; the other is software : putting forward the three levels opening software structure model of arc welding, comparing the opening of software structure model between osaca and ours, putting forward the solutions of the pri and communication among the threads of software system ' s modules, using the dll ' s techniques to solve software ' s module design and putting forward the frame codes, bringing forward the path planning software ' s realization by cp + ptp mode, discussing the real time of windows2000 operating system and advancing its solution
具體包括，硬體部分：弧焊機器人硬體整體系統集成及其工作原理，原系統控制信號的分離和提取，控制系統的開放式設計及組成原理，基於dsp的運動控制卡結構和原理，基於usb介面的觸摸屏式遙控示教盒控制面板的設計，系統抗干擾的軟、硬體措施；軟體部分：提出了弧焊機器人的三層開放式軟體結構模型，軟體結構模型與osaca的模型進行開放性比較，給出軟體系統各模塊線程間優先級和通訊的解決方案，使用動態鏈接庫技術實現軟體模塊化設計並給出了框架代碼，給出了cp + ptp方式的軌跡規劃軟體實現過程， windows2000操作系統實時性問題的討論及解決方案。A kind of mud based on transversal equalizer is recommended, and the performance analysis of ds - cdma systems based on that mud has been done under synchronous channels. then the expression of output signal is deduced. also, the relations among sinr of output signal, snr and correlation matrix of spread code the least mean square error ( lms ) adaptive algorithm is applied to the mud
論文引入基於橫向均衡結構的多用戶檢測器，用矩陣方法推導了awgn通道下、同異步系統中信號輸出表達式，依據最小均方差準則，討論了同步方式下檢測器的輸出信號干擾比與信噪比、擴頻碼相關陣以及用戶功率大小等因素間的關系。Fbg - based strain sensor has many virtues such as unerodibility, absolute code of wavelength, ability for anti - jamming, simple structure and easy execution, etc. so it can replace the traditional mechanical and electrical strain sensor in civil engineering, and has prosperous outlook in the application
光纖光柵應變傳感器具有耐腐蝕、波長絕對編碼、抗干擾能力強、結構簡單、實施方便等特點，在土木工程方面可取代傳統機械電子式應變傳感器，具有很好的應用前景。Sensors using fbg as the sensing component have many advantages including light weight, small size, anti electromagnetism interference, convenience in fiber connecting, wavelength absolute coding etc. multiple point detection of materials ( temperature, strain etc. ) can also be achieved by connecting several sensors into a net using variety of multiplex techniques and embedding it into or sticking on the surface of the material or structure
以光纖布拉格光柵（ fbg ）為傳感元件的傳感器具有重量輕、體積小、抗電磁干擾、易於光纖連接、波長絕對編碼等優點，還能把多個傳感器利用各種復用技術連接成傳感網路，埋入材料和結構內部或貼裝在其表面，實現對其特性（如溫度、應變等）的多點監測。The goal of the filter is to improve the sensitivity of an optical receiver by optimally filtering a communication signal. in this paper we calculated the temporal response of the matched filter, the commonly used f - p filter, as well as the matched weak ofbg filter. we find that the reflected pulse of weak ofbg closely resembles the triangular shape characteristic of a perfectly matched filter
論文計算了通信系統中矩形光脈沖信號經強、弱ofbg 、匹配光濾波器、 f - p濾波器的輸出光脈沖波形，經分析比較后發現：弱ofbg和理想匹配光濾波器的輸出信號波形極其相似，不存在碼間干擾，而f - p濾波器的輸出波形存在比較嚴重的碼間干擾。Telecontrol equipment and systems - part 1 - 5 : general considerations ; influence of modem transmission procedures with scramblers on the data integrity of transmission systems using the protocol iec 60870 - 5
遠程控制設備和系統.第1 - 5部分:概論.帶有擾碼器的數據機傳輸程序對使用協議iec 60870 - 5的傳輸系統的數據完整性的影響分享友人