通道同步器 的英文怎麼說
中文拼音 [tōngdàotóngbùqì]
通道同步器
英文
channel synchronizer- 通 : 通量詞(用於動作)
- 道 : 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) ...
- 步 : Ⅰ名詞1 (步度; 腳步) pace; step 2 (階段) stage; step 3 (地步; 境地) condition; situation; st...
- 器 : 名詞1. (器具) implement; utensil; ware 2. (器官) organ 3. (度量; 才能) capacity; talent 4. (姓氏) a surname
- 通道 : thoroughfare; passageway; pass; enterclose; gallery; drong; tunnel; avenue; alure; way; row; key ...
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For digital audio encoding and decoding modules, delta - sigma modulation is introduced and audio data, preambles with accessorial data are multiplexed according to the digital audio interface standard ; for carrier wave, pll frequency synthesizer is used ; for frequency modulation, voltage control oscillator is taken ; for demodulation, pll frequency discrimination is adopted
調制方式,並按照數字音頻介面標準對音頻數據、同步字和附加信息進行通道復用;對于載波信號,採取鎖相環頻率合成技術手段;對于頻率調制,採用壓控振蕩器;對于解調電路,採取鎖相環鑒頻電路。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。The goal of this thesis is to accomplish base - band channel coding / decoding, fh framing / de - framing and fh synchronization, and also to control the modulator and demodulator in the prototype system. all these functions are implemented with a tms320vc5409 dsp
作為項目的一個重要組成部分,本文採用dsptms320vc5409實現了基帶處理部分的通道編解碼、跳頻意義的組拆幀和跳頻同步、並對調制解調晶元讀寫寄存器進行了配置。In this paper, consulting the idea of software radio and using the three important theories of maximum mean power estimate ( mmpe ) for symbol synchronization algorithm, the kalman decision - feedback equalization ( dfe ) algorithm and the decision - feedback phase lock loop ( dfpll ) algorithm, a kind of low frequency digital demodulate scheme over high - frequency ( hf ) radio channels for 8psk signial is realized
本文利用軟體無線電的思想,提出了一種hf通道8psk信號低頻采樣數字化解調方案。討論了實現該方案的三個核心演算法:最大平均功率定時同步演算法、判決反饋式鎖相環和卡爾曼均衡器,分析它們的基本理論,並進行了性能測試。Each channel has independent synchronization and two powerful digital signal processing chips. one chip performs all the synchronization and sampling computations, while the other does the fast fourier transform of current and voltage signals sampled with 18 bit resolution. both current and voltage have separate but fully synchronized a d waveform capture sections
就信號分析能力而言, 2503ah系列的最大特點是速度和精度,各通道均獨立同步及擁有兩片數字信號處理器晶元,當一晶元執行全部同步與取樣運算時,另一晶元則為已取樣的電流與電壓信號以真實18位解析度進行速傳立葉變換,電流與電壓具分離但完全同步的a d波形捕捉部份This strategy has many advantages : solving the problems that the system is unsteady under super - synchronization ; improving power factor of stator ( it is unity relative to that of rotor ) ; no rotor position sensor and no initial position measurement, easily building up doubly fed speed adjustment system with speed sensorless because adjusting speed is taken in the rotor coordinate and rotor current vector fixing is implemented
該方案由於引入了定子電流勵磁分量的閉環控制,使系統同時具有轉速和勵磁調節兩個調節通道,具有如下優點:一、解決了超同步工作工況不穩定的問題;二、提高了定子側的功率因數(與轉子側功率因數為1相比) 。三、由於速度調節在轉子坐標系下進行,並以轉子電流矢量定向,所以無須轉子位置傳感器,也不用檢測初始位置,易於組成無速度傳感器雙饋調速系統。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。Picep eliminated the drawbacks existing in traditional measurements ( using light oscilloscope, magnetic tape machine and fault wave recorder ), such as failure to start automatic recording, low acquisition speed, less synchronous recording channels, joint grounding of channels and less analysis functions for electrical parameters acquired, etc. picep meets the requirements of both production and r & d need of power system
Picep解決了傳統方法試驗方法(光線示波器、磁帶機、故障錄波器)中不能自動啟動記錄、採集速度低、同步記錄通道少、各通道共地、對測得的電氣參數軟體分析功能少等弊端,滿足了電力系統生產實際和科研的需要。This system is based on two altera ’ s statixii series fpga chips ep2s180f1020c5, and the tunner dtt7579 and the chip ad9433, together composed the main hardware platform. the hardware description system running on the fpga is the core of digital down converted sysgtem, synchronization system, estimation and equalization of channel system, 3780 - point fft ofdm demodulation system, frequency equalization system and ldpc decoding
以兩片altera公司的stratixii系列ep2s180f1020c5級聯為基礎構建了系統主硬體處理平臺,結合湯姆遜公司的調諧器dtt7579以及ad9433組成了系統的硬體構架fpga可描述硬體系統的核心任務包括數字下變頻,同步和通道均衡與估計, 3780點fftofdm解調,頻域均衡, ldpc解碼。We can realize the instrument control system and electric control system by using dcs and plc. the control system of reheating furnace is devided torol furnace area plc control system, roll plc control system and reheating furnace dcs control system. the controller of instrument and electric connect to the server of the operater station by the controlnet, by using dcs and plc, the technology of network and fieldbus technology to combine the process control system and process computer, intelligent instruments, drive system to realize the instrument and electric controll in one system
採用dcs系統plc實現儀控和電控系統,把步進式加熱爐控制系統分為加熱爐爐區plc控制系統、加熱爐前後輥道plc控制系統、加熱爐dcs控制系統等三個子系統,儀表、電氣傳動用的控制器通過同一controlnet控制網與操作站的服務器連接,通過採用網路技術和現場總線技術,將控制系統與過程機、現場智能儀表和傳動設備連成一個整體,從而構成儀電一體控制系統。Harmonic analysis can be produced in as little as 10 milliseconds, or measurements may be integrated over more than a day. the user may set any measurement interval, perform synchronous averaging on harmonics, and even perform full spectrum analysis to detect non - harmonic signal content. the system s main processor controls all display, data storage and i o functions, thus allowing each channel to perform its analysis at maximum speed
在每通道雙數字信號處理器結構中,結果形成超快速諧波分析,諧波分析可於至10毫秒產生,或可綜合測量超過一天,用戶可設定任何測量區間,執行諧波同步平均,及進行全頻譜分析從而探測非諧波信號內容,系統的主微處理器控制全部顯示數據儲存與i 0功能,故使各通道可於最高的速度下進行分析High speed 14 bits 4 channels synchronous a / d converter is also chosen, which can successfully lead to sampling and hold of multiple channels signals
在外圍電路的實現上,選取了四通道14位a d轉換器,真正實現了各路信號的同步采樣保持。This master degree thesis, based on the observing of developing actuality of on - site electrical apparatus monitoring technology, aims at overcoming the problems existing in former on - site monitoring system, such as unable to realize multiple channels sampling and hold, unable to carry out multiple channel programmable magnification, unable to monitor frequency, low pick up bits, external rom low speed data saving, inefficient data query method, inflexible debugging and installation, low precision etc. by introducing eda ( electrical design automation ) technology, we put forward a creative circuit design scheme, which can considerable updated the on - site monitor system
本文根據電氣設備絕緣在線監測技術的發展現狀,針對以往在線監測數據採集系統存在的集成度低,不能實現多通路并行采樣,不能實現多通道同時程式控制放大,不能進行同步頻率監測,采樣位數較低,採用外部存儲器方式,對數據進行查詢的訪問方式,安裝調試不靈活等缺點,提出了應用現代微電子技術電子設計自動化( eda )技術實現對在線監測數據採集系統的改進。The blind synchronization method based on cyclostationarity is firstly analyzed in the downlink. simulations of the method are carried out under different channel conditions. the performances of the method are analyzed, and then compared with the blind method based on the cyclic prefix of ofdm symbols, thus the validity of the method is proved
本文首先在下行鏈路中分析了基於ofdm信號的循環平穩特性的盲同步信息估計演算法,並在多種通道條件下進行了計算機模擬,對基於ofdm信號循環平穩特性的估計器的性能進行了分析,並與基於ofdm信號循環前綴的ml演算法的估計性能進行了比較,從而證明了提出演算法的有效性。Digital signal processor ( dsp ) was used as the microcontroller of the daq card, and synchronous a / d converters were used to collect synchronous signals
該數據採集卡以數字信號處理器( dsp )為主控制器,結合同步模數轉換器( adc )實現了多通道同步採集的功能。The instrument can sample by dual channel simultaneously, and it can process float point data in high speed and high capacity. you can operate the instrument conveniently. data acquisition, storage, display, and analysis can be achieved on the spot
該儀器可進行雙通道同步采樣,具有高速浮點數處理能力,容量大,操作簡單,功能強大,可完成對振動信號的採集、存儲、顯示和分析。In addition, we analyzed characteristics of every instrument of the test system. as key problems, the control, communication and synchronization, such as relay arrays control and gpib communicatipn, of the virtual instrument system were discussed carefully in the dissertation. we also discussed some anti - jamming solutions of the system
詳細研究了基於虛擬儀器的測試系統中對多種程式控制設備的控制方法及系統中的同步方法(負載電源的模擬電壓控制方法、工業控制計算機與gpib設備的通信方法;模擬通道采樣的同步方法、測試程序中數據流的同步方法等) 。A new optimized channel allocation scheme is proposed according to the model of idsm, and a control model of synchronization communication ( dscm ) is proposed based on the optimized channel allocation scheme, including server dscm and client dscm
依據idsm模型,提出了一個新的優化通道分配方案,並在此基礎上,提出了同步通信控制模型dscm ,包括服務器dscm模型和客戶dscm模型。For ofdm communication systems in multipath environment, we introduce a symbol timing error estimation algorithm based on a new eqivalent system model. it works even in strong multipath environment and its computation cost is relatively small
針對ofdm同步問題構造了一種多徑環境下ofdm通信系統的簡化等效模型,並在此基礎上提出一種多徑通道下的ofdm定時偏差估計器。The functional module and the mainboard compose an automatic measurement instrumentation with real - time data acquisition and processing function. this module involves two multi - channel adc and the sample clock is shared between these adc so as to synchronization
本模塊使用了單片集成多通道同步a d轉換器,並在轉換器之間共享采樣時鐘的方法在模塊內部實現了通道間同步。分享友人