數字載波 的英文怎麼說

中文拼音 [shǔzìzǎibō]
數字載波 英文
digital carrier
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 字 : Ⅰ名詞1 （文字） character; word 2 （字音） pronunciation 3 （字體） form of a written or printed ...
  • 載 : 載Ⅰ名詞（年） year : 一年半載 six to twelve months; six months to a year; 三年五載 three to five ...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 數字 : 1. （表示數目的文字; 表示數目的符號） figure; digit; numeral; character; numeric character 2. （數量） quantity; amount
  • 載波 : signal carrier; carrier wave; carrier: 3路載波 three channel carrier載波傳輸 carrier transmission...
  1. 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。
  2. Technical specification for nicam - 728 digital audio signal transmission with satellite tv channel subcarrrier

    Nicam - 728衛星電視通道副載波傳送數字聲技術規范
  3. As a result, pseudorandom code acquisition and tracking, carrier recovering, error correction and decoding functions are needed in the if digital receiver

    因此，其中頻數字接收機需要完成偽隨機碼捕獲跟蹤、載波恢復、糾錯譯碼等功能。
  4. With the rapid development of the carrier phase differencing technique and digital signal processing hardware, it is possible to implement real - time processing of gps based attitude determination system

    隨著載波相位差分技術和數字信號處理硬體的快速發展， gps姿態測量的實時處理成為可能。
  5. The subject inducts digital time division technology ( pwm ), which is more advantageous at the accuracy and the predigest of hardware than simulant multiplication. what they call measuring power energy reasonably is that measuting except harmonics power energy fed back power. yet it realizes reasonable measurement of power energy which measures by base wave ac parameters method base on digital time division

    本課題引入了數字時分割（ pwm ）脈寬調制技術，在測量的準確性、硬體電路的簡化等方面都比模擬乘法器具有較高的優越性。所謂合理的計量電能，就是不計非線性負載回饋給電網的負的諧波電能，而採用基於數字時分割的基波交流參數測量的方法，真正實現了電能的合理計量。
  6. The modulation circuit utilized the vector modulation technology based on fourth - harmonic mixer. the lo frequency is only quarter of carrier frequency. direct high speed qpsk digital modulation of millimeter wave signal can be realized with fairly simplified lo circuit

    調制電路採用了以四次諧波混頻器技術為核心的矢量調制技術，利用1 / 4載波頻率作為本振信號，實現了對毫米波信號直接進行高速qpsk數字調制。
  7. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  8. The design of power line spread spectrum carrier communication system in fpga with digtal technology

    的數字化電力線載波擴頻系統的設計
  9. The increasing of single channel capacities and evolution of optical networks topology, from simple point - to - point to intelligent optical networks, call for strict demands to optical filters. in this paper, the crucial technologies of optical filters such as interleaver, optical digital filter, fused biconical taper all - wave coupler as well as polarization - pump combiner have been studied experimentally and theoretically, which include : 1. a new process, cascaded fbt ( fused biconical taper ) with precise control as well as strict interference arm length difference, is proposed for the first time to our knowledge

    單通道速率不斷提高以及網路拓撲由單一的點對點傳輸向可上下載的環網和可動態選擇波長路由的智能型格形光網路演進，對光濾波器的常規性能指標、時域特性和動態可調諧特性提出了更加苛刻的要求，鑒於此，本論文全面研究了全光纖熔錐型奇偶交錯濾波技術、數字光濾波技術、基於g - t全通濾波器的奇偶交錯濾波技術以及熔錐型全波耦合器和偏振泵浦合波器。
  10. 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。
  11. Domestic satellite communication earth stations - general technical requirements part 5 : intermediate data rate digital carriers

    國內衛星通信地球站總技術要求第五部分:中速數據數字載波通道
  12. To avoid excessive transmission distortion, the bandwidth between transmitter and receiver must be at least twice that with digital carrier modulation

    為避免過量的傳輸失真，發射機與接收機之間的帶寬至少要兩倍于數字載波調制的帶寬
  13. In the last, test and optimization of dvb - c modulator system are addressed. methods of test and some items which should be paid attention of digital carrier level and rate of carrier to noise 、 relationship between ber and c / n 、 mer ( modulator error rate ) are given, some test results got by analyzer are all up to dvb - c test standard

    給出了數字載波電平與載噪比（ c / n ） 、誤碼率（ ber ）與載噪比（ c / n ）關系、調制誤碼率（ mer ）測試的方法與測試注意事項，通過分析儀等分析得到結果包括列表和圖示，達到了dvb - c規定的各項指標。
  14. The medium access control ( mac ) layer protocol of the airlink interface between the mobile data base station ( mdbs ) and mobile end systems ( m - ess ) in cellular digital packet data ( cdpd ) is studied firstly. the access method of slotted non - persistent digital sense multiple access with collision detection ( dsma / cd ) is described mainly

    本文首先研究了蜂窩數字分組數據（ cdpd ）空中介面中的介質接入控制層（ mac ）協議，詳細論述了基於時隙的非堅持的、帶沖突檢測的數字載波偵聽多址接入協議（ dsma cd ） 。
  15. Firstly, on the base of analyzing psk ' s theory and audio - card ' s constitute and data transfers, bdpsk and qdpsk soft - modulation and soft - demodulation systems based on audio - card are studied and implemented, including generating digital carrier sequence, synchronizing carrier, designing filter, sampling and judging, etc. the system adopts coherent demodulation method, synchronizing carrier adopts costas loop

    本文首先分析了調相信號調制解調的基本理論和多媒體計算機（ mpc ）聲卡組成原理及數據傳輸等方面的內容，然後研究並實現了基於計算機聲卡的bdpsk和qdpsk信號軟體調制解調系統，內容包括數字載波序列的產生、載波同步、濾波器設計，信號的抽樣判決等。
  16. The purpose of this paper is to resolve some key technologies of the amplitude - modulation inductive displacement transducer signal processing circuit with nanometer resolution, such as the design of high stability signal generating circuit ; the technology of high precision digital phase - sensitive detection circuit ; the technology of digital filter and linearization, etc

    本文主要研究調幅式電感位移傳感器精密測量系統中涉及的高精度載波信號發生技術、高精度數字相敏檢波技術、數字濾波及線性擬和等關鍵技術，目的是進一步改善調幅式電感位移傳感器精密測量系統的測量精度，適應納米級測量的要求。
  17. Dbf algorithms for 2d planar array based on the algorithms for 1d array are discussed in this paper. the author ' s main contributions include research of the adaptive digital beamforming algorithm, which control both amplitude and phase of each array element : diagonal loading qrd - smi algorithm. research of two phase - only dbf algorithms : small phase perturbation restriction algorithm and maximum gain of the expected direction restriction algorithm

    面陣的數字波束形成演算法是面陣dbf技術的關鍵，本文在現有的一維數字波束形成演算法基礎上，研究了二維面陣的數字波束形成演算法，主要工作有：面陣的幅度相位全控制自適應數字波束形成演算法? ?對角加載qrd - smi演算法的研究；兩種面陣唯相位（ phase - only ）數字波束形成演算法? ?小相位擾動約束演算法和期望方向增益最大約束演算法的研究；面陣的數字多波束形成演算法? ?二維fft多波束的研究，以及fft在可編程邏輯器件中的實現。
  18. We made an improvement in overcoming the defects in speech signal adaptive delta modulation ( abbr. adm ), such as slope overloading and grain noise. in this method, numerical sliding average filtering was used for filtering decoding speech signal. experiments and analyses indicate that the method makes waveforms in good agreement between the decoding of adm and the original pulse coding modulation ( abbr. pcm ) signal, and considerably improves, the playback speech quality in naturalness, legibility and under standability

    針對語音信號自適應增量調制（ adm ）方式中斜率過載和顆粒噪聲缺點，提出了一種改進方法，它利用滑動平均方法對解碼后的信號進行數字濾波.試驗和分析表明，該方法使解碼后的信號波形與原脈沖編碼調制（ pcm ）波形具有很好的一致性，使再生語音質量在自然度、清晰度和可懂度方面比改進前均有較大提高
  19. Phase - lock part of the system was simulated in system view that is a eda tool, including picking - up carrier synchronization algorithm and designing filter, etc

    系統採用相干解調方法，載波同步採用costas環，在系統開發過程中，利用eda工具systemview對鎖相部分包括載波同步演算法和數字濾波器設計等內容進行了模擬分析。
  20. In the view of stochastic resonance ( sr ) and signal processing, parameter - turning sr ( psr ) theory and method is proposed and the characteristics of bistable systems are studied. the applications of psr in multi - frequency analog signal processing, digital baseband pulse - amplitude modulation signal transmission and digital carrier modulation signal transmission are investigated. this thesis has also introduced the concepts of parameter - adaptive sr and array - induced sr

    本文主要從隨機共振物理力學機理與信號處理的角度，研究了非線性雙穩態系統的數字特徵，提出了參數調節隨機共振（ psr ）理論和方法，並將這一理論應用到多頻模擬信號處理、數字基帶信號傳輸和數字載波調制信號傳輸中，引入了參數自適應隨機共振和陣列隨機共振系統的概念。
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