speed receiver 中文意思是什麼
speed receiver
解釋
速率信號接收器-
Considering the precision and cost of sea - route in our country, gps oem board was selected positioning for system in stand - alone model ( not dgps ). there is abundant time to processing and optimizing data for gps receiver because the reactive speed of pharos is on hour level contrast to strict real time
根據航道定位精度要求與成本承受能力，系統選取低成本的gpsoem板接收機進行單機定位，由於航標燈監控有一定實時性但又非嚴格意義上的實時性，其反應速度可到小時級，這為gps接收機定位提供了寬裕的時間作為數據處理與優化。 -
Gps receivers belong to the user equipment, mainly used to receive satellite signals and telegraphese, measure the distance from receiver to the satellites by the wireless signals, compute the position and speed of satellites by telegraphese, then compute the position and speed of user
Gps衛星接收機屬于衛星導航定位系統中的用戶設備，主要用於接收衛星信號和電文，由無線電信號測定用戶至衛星的距離，或多普勒頻移等觀測量;根據導航電文，計算觀測衛星的位置和速度，根據觀測量和衛星的位置、速度，解算出用戶的位置和速度。 -
The architectures of the receiver are rf pass band direct sampling and if pass - band sampling with high - speed analog to digital converter after rf to if conversion. the first kind of architectures is hard to realize because of the requisition of devices is too high
軟體無線電接收機分為射頻直接帶通采樣和將射頻信號變換到中頻后再進行帶通采樣，前者實現較難，對器件的要求太高，然後進行各種數字處理。 -
The progect has got the imbursement of progect named " burst mode receiver / transmitter in broadband access network " ( no : 2002aa101a04 ). the accomplishment of the 155mb / s burst mode receiver makes essential conditions for the accessing of optical fiber to the common families and estabiishs a theory and technical foundation of the developing burst mode receiver / transmitter of the speed over 155mbit / s
本課題的研究得到項目「寬帶接入網突發式光發射和接收模塊」 （項目編號： 2002aa101a04 ）的資助。 155mb s突發式光接收模塊的研製成功為光纖進入普通家庭創造了基本的條件，也為以後開發155mb s以上速率的突發式光收發模塊奠定了堅實的理論和技術基礎。 -
Undaunted, the dog responds as quickly as any human. using her nose to get the phone off the receiver, she presses 911 on a speed - dial button and barks urgently into the phone
她用鼻子撂下電話聽筒，並按下快速撥號鍵接通911美國呼叫救護車電話號碼為911 ，然後急切地對著聽筒吠叫。 -
A type of receiver circuit and timing circuit which can be applied in high - speed laser range - finder is discussed in this paper
本論文詳細討論了一種可實現高速激光測距的接收電路和計時電路。 -
Results rectify that matched field processing based on ray travel time delay is insensitive to the mismatch of sound speed proflle, although the mismatch of ocean bottom depth and receiver location is bad to matched field processing, different forms of cost fimctions could decline the sensitivity
計算結果表明，基於聲傳播時延的匹配場定位對聲速分佈失配是不敏感的。雖然接收基陣位置傾斜和海洋深度誤差對匹配場處理影響較大，但只要選擇適當的代價函數，可以得到克服。 -
In this thesis, we realize the web - based rtu in telecontrol system for electrical railway systems by using new techniques of computer, communication, and existing the resources of super - speed fiber optic cable that we have already had. besides, we also realize the multi - receiver of the rtu real - time information and the consistency of the information ; the bottleneck problem of the communication and " information solitary island " can also be solved. improving the consistency and real - time performance of information transmission, sending all kinds of information more accurate, safety and faster to the places where the information is required and receiving permitted, realizing larger scope information sharing are all newly and highly anticipated projects in the area of supervise and control
最大程度的結合新型計算機通信、網路及軟硬體技術，利用目前已經具備的高速光纜通道資源，實現scada系統被控端基於web方式的廣泛聯網，可以解決rtu信息一發多收、一致性，通信瓶頸及『信息孤島』等問題，提高信息傳輸的實時性和一致性，把各種信息更加準確、安全、快速的送到所有需要並被允許的地方，實現更大范圍的信息共享，是目前監控領域的一個嶄新而又備受關注的課題，本文首先綜述了電氣化鐵道scada （電鐵scada ）系統的三大組成部分：調度端、被控端和通信通道的發展概況，闡述了傳統模式的電鐵遠動系統的弊端所在，接著提出了基於web模式的電鐵scada系統硬體結構設計。 -
3 a novel recursive least - square ( rls ) blind space - time receiver algorithm based on the constrained condition, which can completely avoid the matrix inversion introduced into by constraints ( comparing with the normal rls ), is proposed for multi - path slow fading cdma channels. the computational complexity of this method is not only lower than that of the normal rls, but also lower than that of both lms and ls blind space - time receiver methods that are realized based on the rosen ' s gradient projection. and the speed of convergence of the presented rls blind space - time receiver algorithm is better than that of both lms and ls blind space - time receiver methods
3 、針對多徑慢衰落通道下ds - cdma盲空時接收機中線性約束二次規劃問題提出一種新的遞歸最小二乘演算法，該演算法完全避免因約束而引進的矩陣求逆運算（相對于常規的遞歸最小二乘演算法） ，不但運算量比常規的要低，而且比基於rosen梯度投影實現的最小均方（ lms ）與最小二乘盲空時接收機演算法還低，且收斂速度比基於rosen梯度投影實現的最小均方（ lms ）與最小二乘盲空時多用戶檢測都好，將提出的新的遞歸最小二乘演算法與提出的數據選擇方案結合起來可以進一步降低其運算量，具有很大的實用價值，最後通過模擬實驗進一步分析了其性能。 -
A novel receiver in high - speed serial data interface usb 2
一種新型的用於高速串列介面電路中的接收器 -
It can be used in any complex environment, can locate all paths from transmitter to receiver which avoid redundant calculation, and it is a standard 3 - d forecast model ; in addition, it is a point to point ray tracing method based on specular theory which do n ' t carry out the receive test ; furthermore the model adopt the reverse arithmetic which exert the tree concept in data frame and establish a virtual fountain tree permanently, the proagmme can back - search the virtual fountain tree when it is running. these operation increase the calculate speed and it result in the higher receive efficiency and precision. the thesis design a programme to compare the prediction results based on ray tracing method of virtual fountain tree between the measurement results and prediction results based on the other transmittion models. the comparsion result indicate the new model is a better model
它可應用於任何復雜的傳播環境中，能找到發射機到接收機之間的所有電波傳播路徑而無須冗餘的計算，是一種準三維的預測模型；另外，從本質上講，它仍然是一種基於鏡像理論的點對點的射線跟蹤法，所以它無須進行接收測試；而且由於採用了反向演算法，運用數據結構中多叉樹的概念，先確定需要計算的場點位置，找出所有能從源點到達場點的射線，並且可一次性建立一個虛擬源樹，以後每次的計算只要通過對該樹進行後序遍歷即可，大大提高了運算速度，因而有較高的接收效率與精度。本文對該模型進行了相應的模擬，並將其預測結果與實測結果以及基於cost231經驗性模型和基於強力射線跟蹤確定性模型的預測結果進行了比較，結果表明了該模型的優越性。 -
Under these fimctions, mismatch of ocean depth, receiver location and sound speed profile have been simulated respectively
文中運用該函數分別對海底深度、接收基陣位置和聲速分佈三種失配情況進行計算機模擬研究。 -
Different results specify that the first kind of cost function is sensitive to the mismatch of ocean depth and receiver location, but is insensitive to sound speed profile ' s % $ jai8x9 @ t $ m & z mismatch and has high accuracy of depth localizaion ; the second kind of cost fimction is insensitive to all three kinds of mismatch, but its resolution of depth is very low ln order to overcome the cost function ' s sensitivity to mismatch, improvemedt of the accuracy of time delay estimation and model calculation may be adopted, when both conditions are reached, the sensitivity wiil be greatly reduced and the resolution of range and depth will be improved at the same time
模擬結果表明，第一類代價函數對海底深度和基陣傾斜失配是敏感的，對聲速失配卻不敏感，並且能夠獲得較高的深度定位精度；第二類代價函數對三種失配都不敏感，只是深度解析度較低。為了克服代價函數對失配的敏感性，可採用提高時延估計精度和模型計算精度的方法。當兩個條件滿足時，敏感性得到極大的抑制並獲得了較高的距離和深度估計精度。 -
The focus, field of view and transmissivity of the optical system of the receiver are analyzed. a high - speed transimpedance amplifier circuit is designed with optimized noise. through the noise model
設計了一種噪聲優化的高速跨阻前置放大電路，根據跨阻放大電路的噪聲模型詳細分析了輸出噪聲電壓、信噪比和信號動態范圍。 -
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。 -
On the one hand, the receiver must be self - adaptive to set as fast as possible the " 0 " and " 1 " bit level judgement threshold in a dynamic way ; on the other hand, the transmitter of onu should take some measures to minimize and compensate for the burst delay. the optical burst transmission circuit is thus required to switch on and off the laser in a snappy way to ensure fast signal sending. in that sense, the laser must be designed with a superb response speed
一方面，接收機必須具有自適應功能，能以最快的速度動態調定" 0 " 、 " 1 "比特電平判決門限；另一方面， onu的發射機應該採取-定的措施減小和補償突發時延，其光突發發送電路要求能夠非常快速地開啟和關斷激光器，迅速發送信號，所以，它需要使用響應速度很快的激光器。 -
Then, introducing something about spread spectrum technique. and deciding to select direct - sequence spread spectrum ( ds ) in underwater acoustic communications by comparing ds to fh according to the properties of underwater acoustic channels. after that, discussing something about rake receiver, simulating the path - search algorithms, synchronization circuits and rake receiver in low speed underwater acoustic communications and analyzing some major factors influencing the performance of systems
然後介紹了rake接收技術的基本原理，並對rake接收系統中的路徑搜索和同步系統進行了討論和模擬分析，另外還對rake接收技術在低速水聲通信系統中的應用作了模擬分析，並討論了一些影響rake接收系統性能的主要因素。 -
The paper introduces the principle of transient rayleigh wave exploration and the calculating process of f - k region analysis, according to experimental data analyzes the influences of the parameters on the calculation of phase speed of rayleigh wave and the various factors affecting transient state rayleigh wave exploration, at last, gives some advices on how to choose the best sampling rate, group interval, offset, vibrating source and receiver
介紹了瑞雷波勘探的原理和f - k域分析法的計算過程，分析了各參數對瑞雷波相速度計算的影響，通過實驗數據分析了影響瑞雷波勘探的主要因素，就如何選擇最佳采樣率、道間距、偏移距、震源以及檢波器等提出了幾點建議。 -
In this topic, an adc circuit and data - storage system for all digital ultra - wideband receiver was designed, and the ultra - wideband narrow pulse signal that is received is digitalized, using an ultra - high - speed a / d convertor
本課題設計了一個全數字化超寬帶接收器的adc電路及數據存儲系統。利用一個超高速的ad轉換器，對超寬帶窄脈沖信號進行數字化。 -
Along with millimeter wave technology development, the high speed modulate 155mb / s millimeter wave receiver requires that the local oscilloscope performance should be excellent to satisfy its communication requirement. this article aimed at the requirement of 8mm millimeter wave receiver and developed a high performance millimeter yto frequency synthesizer. the article introduces several millimeter wave frequency synthesizers and analyzes their characteristic
隨著毫米波技術的發展，在毫米波段高調制速率的毫米波通信機對毫米波本振源提出了更高的性能要求，本文針對8mm高速寬帶155mb / s無線接入通信系統對毫米波本振源的要求，介紹了幾種毫米波頻綜的設計方案，並進行了分析，最後決定採用鎖相倍頻的方案。
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