調變電碼 的英文怎麼說
中文拼音 [diàobiàndiànmǎ]
調變電碼
英文
pseudo random noise-
On the base of researching the theory of the scheme and analyzing the signal feature, it is obtained that the existence manners and character of distance information in the differential frequency signal. at the same time, a new conclusion is gained that the technology of frequency agility can decrease the constant error of system. it is also to say that frequency agility and frequency modulation fixed - distance fuze has the similar feature to random period frequency modulation fixed - distance fuze. according to the theory of address coding in the hopping - frequency communication, the paper presents the principle of selecting the frequency agility sequence which fit to the radio fuze and constructs the frequency agility sequence family based on the rs codes
在深入研究方案原理和分析信號特徵的基礎上，獲得了該體制引信差頻信號中，距離信息的存在形式和特點，得出了頻率捷變技術的引入降低了系統定距固定誤差這一新的結論，即頻率捷變調頻定距引信在定距性能上具有類似隨機周期調頻定距的特徵。本文引入跳頻通信地址編碼理論，結合無線電引信的具體特徵，提出了適用於無線電引信的頻率捷變序列的選擇原則，並構造了基於rs碼的寬間隔頻率捷變序列族。Colour tv, colour tv with satellite channels, fax modem line, hair dryer, mini - bar in room, shampoo, tooth brush, broadband internet access, connecting room, electrical transformer on request, iron ironboard, safe deposit box - in room
彩色電視，彩色電視衛星電視，傳真資料調碼器，干發器，室內小型酒吧，洗發露，牙刷，寬頻上網，相連房間，租借變壓器，熨衣，室內保儉箱Alarm clock, audio visual equipment, colour tv, colour tv with satellite channels, electrical transformer on request, hair dryer, tea coffee making facilities, voice mail, broadband internet access, connecting room, extra bed, fax modem line, iron ironboard, mini - bar in room, safe deposit box - in room
鬧鐘，影音設備，彩色電視，彩色電視衛星電視，租借變壓器，干發器，咖啡茶機，留言服務，寬頻上網，相連房間，加床服務，傳真資料調碼器，熨衣，室內小型酒吧，室內保儉箱Audio visual equipment, bathrobes, broadband internet access, colour tv, colour tv with cable network, colour tv with satellite channels, connecting room, electrical transformer on request, extra bed, fax modem line, hair dryer, in room data port, mini - bar in room, safe deposit box - in room, shampoo, shower cap, slippers, tea coffee making facilities, tooth brush, voice mail, welcome fruit, welcome tea, alarm clock, iron ironboard
影音設備，浴袍，寬頻上網，彩色電視，有線電視，彩色電視衛星電視，相連房間，租借變壓器，加床服務，傳真資料調碼器，干發器，室內資料輸人插口，室內小型酒吧，室內保儉箱，洗發露，浴帽，拖鞋，咖啡茶機，牙刷，留言服務，迎客果盤，迎客名茶，鬧鐘，熨衣Alarm clock, audio visual equipment, bathrobes, broadband internet access, colour tv with cable network, colour tv with satellite channels, extra bed, fax modem line, hair dryer, in room data port, mini - bar in room, safe deposit box - in room, shampoo, shower cap, slippers, tea coffee making facilities, tooth brush, voice mail, welcome fruit, welcome tea, connecting room, electrical transformer on request, infotainment with video on demand computer game
鬧鐘，影音設備，浴袍，寬頻上網，有線電視，彩色電視衛星電視，加床服務，傳真資料調碼器，干發器，室內資料輸人插口，室內小型酒吧，室內保儉箱，洗發露，浴帽，拖鞋，咖啡茶機，牙刷，留言服務，迎客果盤，迎客名茶，相連房間，租借變壓器，娛樂資訊收費電視電腦游戲Alarm clock, audio visual equipment, bathrobes, broadband internet access, colour tv, colour tv with cable network, colour tv with satellite channels, extra bed, fax modem line, hair dryer, in room data port, iron ironboard, mini - bar in room, safe deposit box - in room, shampoo, slippers, tea coffee making facilities, tooth brush, voice mail, welcome fruit, connecting room, electrical transformer on request, shower cap, infotainment with video on demand computer game
鬧鐘，影音設備，浴袍，寬頻上網，彩色電視，有線電視，彩色電視衛星電視，加床服務，傳真資料調碼器，干發器，室內資料輸人插口，熨衣，室內小型酒吧，室內保儉箱，洗發露，拖鞋，咖啡茶機，牙刷，留言服務，迎客果盤，相連房間，租借變壓器，浴帽，娛樂資訊收費電視電腦游戲Alarm clock, colour tv with satellite channels, fax modem line, hair dryer, mini - bar in room, safe deposit box - in room, shampoo, shower cap, tea coffee making facilities, tooth brush, welcome fruit, welcome tea, audio visual equipment, connecting room, broadband internet access, electrical transformer on request, extra bed, voice mail
鬧鐘，彩色電視衛星電視，傳真資料調碼器，干發器，室內小型酒吧，室內保儉箱，洗發露，浴帽，咖啡茶機，牙刷，迎客果盤，迎客名茶，影音設備，相連房間，寬頻上網，租借變壓器，加床服務，留言服務In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage
我們對兩種正交調制方式（ 16qam和4 - qpsk ）進行了模擬工作並給出了模擬結果，同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試；然後在基於軟體無線電思想的數字處理平臺（該數字處理平臺實現了中頻數字化）上用dsp軟體完成了載波的相位跟蹤。It showed that activated inhibition by weak noise could be gabaergic inhibition. from above the findings, we could give a hypothesis that the input of random oscillation induced by noise in the cochlea to central auditory system could be integrated in the central auditory nucleus and the response of sound - sensitive neuron to sound stimuli could be adjusted to an optimum state for signal intensity coding
根據這些變化可以推測，這種背景噪聲的生物學作用可能是通過弱噪聲所引起的耳蝸隨機共振的輸入，在上行過程中經各級聽覺核團的整合，將中樞聲敏感神經元調定在一種準備狀態，並定型放電率函數和調制神經元對聲馨碩士學位論文master 』 st砰iesis強的編碼。At the aspect of hardware design, it adopts pulse distributor and the technology of single polar voltage drive to accomplish the function of controlling and driving stepmotor ; it adopts the technology of pulse width modulation and cmos h - bridge drive to accomplish the function of controlling and driving dc servomotor ; it adopts d / a convertor to accomplish the function of controlling ac transducer ; it adopts the technology of digital phase detection to accomplish the function of detecting the feedback position signal of induction phase shifter ; it adopts dsp ’ s capture cell to accomplish the function of detecting the feedback position signal of photoelectric coder
硬體方面，採用脈沖分配器和單極性電壓驅動技術實現了步進電機的控制和驅動功能;採用脈寬調制技術和cmos互補h橋驅動技術實現了直流伺服電機的控制和驅動功能;採用d / a轉換器實現了交流變頻器的控制功能;採用數字化相位檢測技術實現了感應移相器位置反饋信號的檢測功能;採用dsp的捕獲單元實現了光電編碼器位置反饋信號的檢測功能。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。The electrical structure and mechanical structure of the non - ripple torque control system of brushless motor is almost the same as that of the control system of conventional brushless motor. the difference is that the non - ripple torque control system of brushless motor has a incremental encoder which the control system of conventional brushless motor has not, which results in a great change of control method
永磁無刷電機無脈動轉距調速系統與傳統無刷電機調速系統在電磁、機械結構上基本一樣，所不同的是它在傳統無刷機控制系統的基礎上增加了一個增量式編碼盤，從而導致其控制方法有了比較大的改變。In the modulation / demodulation circuits, cpld is selected as platform of the digital logic part, which includes series - shunt / shunt - series transform, difference coding and sample verdict
調制/解調電路中，串並/並串變換、差分編/解碼和抽樣判決等數字邏輯部分是以cpld作為開發平臺，論文給出了實現上述功能的vhdl程序及模擬、測試結果。According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system
針對研製任務的要求，課題期間研製了下位機系統硬體和軟體，開發了上位機監控軟體，其中所作的具體工作包括：測量原理的研究和在系統中的實現，在本次設計中用三種方法來進行水位測量，分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法；主控晶元的選擇，我們選用了高集成度的混合信號系統級晶元c8051f021 ；實現了信號的採集和處理，包括信號的轉換和在單片機內的運算；高集成度16位模數轉換晶元ad7705在系統中的應用，我們完成了它與單片機的介面設計及程序編制任務；精確時鐘晶元ds1302在系統中的應用，在此，我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬，該晶元的應用給整臺儀器提供了時間基準，方便了儀器的使用；另外，針對研製任務的要求，還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測，該部分的實現是通過採用ad421晶元來完成的，本設計中完成了ad421與單片機的spi介面任務，協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系，並完成了程序設計；與上位機的通信介面設計，該部分通過兩種方法實現： rs232通信方式和rs485通信方式；系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。With the computer controlling the output of the digital signals and the analog signals, controls and adjusts startup, stop, turn and rotational rapidity of the transducer - electromotor and the strength of brake actuator ; installs the torque sensor on dynamical axis, and installs the encoder on non - dynamical axis of the dimensional globoidal indexing cam mechanism ; utilizes the virtual instrument language labview development the test and control system, with the computer real - time monitoring, late displays and storages the data of the test, and processes the data and analyses it
利用計算機控制數字量輸出和模擬量輸出來達到控制和調節變頻電機啟停、轉向、轉速;控制制動器的啟停和加載力;在弧面分度凸輪的加載軸和空軸上安裝扭矩傳感器和編碼器;應用虛擬儀器語言labview開發試驗臺的測控軟體系統，用計算機進行實時監測與事後顯示與存儲，並進行信號處理與分析。This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits
本文採用了一種基於fpga的通用數字調制解調方案，該方案在調制端採用了正交平衡調制技術，在解調端採用了中頻帶通采樣、數字匹配濾波、延時差分解調等技術，直接在中頻上進行數字信號處理，不需要進行下變頻，也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。And the inverter becomes smarter. during the designing, the pulse - processing ciucuit is preset which processes the feedback pulse from photoelectric encoder for close - looping the system in future. by using the circuit and quadrature mode of timer 1 in 80c196mc, incremental encoder can be embedded into the velocity regulation system more easily and the domain the inverter can be used in is enlarged too
在系統設計過程中，考慮到了變頻調速器進一步改進為閉環系統的需要，在電路中預設了光電碼盤反饋脈沖的處理電路，通過這個電路的處理，並利用80c196mc中定時計數器1的90相移計數工作方式，可大大簡化使用增量式光電碼盤時脈沖處理的復雜度，這也擴大了本文中變頻調速器的應用范圍。1. automatic transmission system, srs system, electronic steering system, air - condition system, electric - magnetic control module, 4 - wheel drive system, electronic automobile motor system and the electronic automobile air - condition system : read dtc, clear dtc, action status indication, control unit identification
1自動變速箱系統安全氣囊系統電子轉向系統空調系統電磁控制模組系統四輪驅動系統電動汽車馬達系統和電動汽車空調系統，功能均為讀故障碼清除故障碼動作狀況表示控制單元識別。Figures karaoke electric circuit, automatically connect to sing, follow to sing, change the function
數碼卡拉ok電路，自動接唱，跟唱，變調功能分享友人