wideband data 中文意思是什麼
wideband data
解釋
寬帶數據-
The catv charge and control system is mainly composed of the management software 、 the header data modulator and the terminal charge and control equipment. i am responsible for design catv charge and control equipment and test system. the header data modulator is used to encrypt the control single from computer and transmit it into the appointed frequency. the terminal charge and control equipment demodulate out the control single from data modulator and transmit it to the addressing control part, where the demodulated fsk single is received and well - handled by the cpu unit, decode the unauthorized signals and deliver it to the shut point, shut point make use of capability of wideband anf characteristic of shut, then the signal of illegal customer will be turn off and vice versa, the legal customer can receive the normal signal
前端數據調制器完成對計算機輸出的控制信號加密處理，將指令碼載送到一指定頻率點。終端收費控制器解調出控制信號，送至單片機尋址控制部分。單片機尋址控制部分接收經fsk數據解調器送來的信號，送入cpu單元后，解出不授權信號，然後向關斷部分送入信號，關斷部分利用pin二極體的寬帶工作能力以及關斷特性，實現對非授權用戶或者非法用戶的信號關斷，使之不能正常收視，繳費用戶進行開通正常收視，達到控制用戶通道的管理。 -
Frequency estimation technology and bandpass filtering, which are named as wideband digital downconversion technology, are the key technologies to realize data rate conversion system
測頻技術以及帶通濾波，即寬帶數字下變頻技術，是實現數據率轉換系統的關鍵技術。 -
According to wideband mission data protocol, the paper finishs such work as identifying synchronization codes, inverting pseudo randomizer, unwrapping data packages. then, according to etm + mission data formats, imaging data and parameters used in calibration are extracted, and inputed into files
根據其寬波段任務數據協議和etm +任務數據格式，論文工作完成了數據的解同步、解擾、解包等步驟，並提取得到圖像數據和用於輻射及幾何校正的參數，最終輸入到相應文件中，生成零級產品。 -
Firstly, the system has a good snr and high accuracy, which is owed to wideband operational amplifier being used, accurate adjustment by da, 12 - bit high sampling ad converter being applied. secondly, data transmission becomes less by using forecasting code technology and dictionary compress technology, which are run by dsp on board
本採集系統採用400mhz增益帶寬積的運算放大器，運用da高精度校準技術，並選用高采樣率低噪聲的12位ad轉換晶元進行模擬電路和ad轉換電路設計，既保證了數據採集系統的信噪比，又提高了系統測量精度。 -
At present, the mismatch between the high - speed data flow of the wideband a / d converter and processing capability of the general dsp hinders the digitization of the electronic reconnaissance system most
目前，寬帶高速a d變換器的高速數據流與通用dsp處理能力的不匹配，成了電子偵察系統數字化的最大障礙。 -
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。 -
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。 -
Wideband data peak frequency deviation
寬帶數據峰值頻偏 -
The system can scan the wideband frequency 、 lock the frequency of receiving data and convert the if signal to digital data timely. directly sampled data by a / d or saved data by sdram ( when signal speed is too high ) can be transmitted to pc by usb2. 0 or to dsp by link port in order to complete the modulation detecting and intercepting of signals
信號經高速a / d變換可以實時或經sdram緩沖后（當采樣速率過高時）由usb2 . 0總線傳入pc或由linkport傳入後端雙dsp綜合信號處理板進行調制識別處理（或接收由雙dsp信號處理完的數據並傳入pc機完成後續運算處理） ，完成無線電監測。 -
The current commercial ddc lack of high speed data processing and fast tune change, which limit the develop of the wideband digital receiver, so special digital intermediate frequency system is needed
目前商用的數字下變頻器由於缺乏高的數據速率和快的調諧時間，使得寬帶數字接收的發展受到限制，這就需要有專門的數字中頻系統來解決此問題。 -
Wideband cabled distribution systems - recommendations for one - way and interactive data services
寬帶電纜的配電系統.第5部分:單向和相互作用的數據使用推薦標準 -
Ultra - wideband ( uwb ) communication is a wireless communication technique, in which data are transferred using narrow pulses with very short duration
超寬帶（ ultrawideband ）是近年來發展起來的無線電技術。它和傳統無線電系統相比在很多方面都具有明顯優勢。 -
Based on data rate conversion technology, wideband digital ew receiver is able to achieve high intercept probability, high sensibility and the ability of approximately real - time signal processing
建立在數據率轉換技術之上的寬帶數字偵察接收機要求能夠實現高截獲概率、高靈敏度、近乎實時的信號處理能力。 -
Data rate conversion technology for signal is one of the key technologies of wideband digital reconnoitering receiver. it is the feasible scheme to resolve the rate gap between the front end data flow of high speed analog digital converter ( adc ) sampling and the back end digital signal processor ( dsp ) processing
雙信號數據率轉換技術是寬帶數字偵察接收機關鍵技術之一，是解決寬帶數字接收機中前端高速adc采樣的高速數據流與後端dsp處理速度之間瓶頸問題的可行方案。 -
Sam. wideband air interface - scalable adaptive modulation physical layer specification - public safety wideband data standards project - digital radio technical standards
寬帶空中介面.可擴縮自適應調制
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