調制系統 的英文怎麼說

中文拼音 [diàozhìxìtǒng]
調制系統 英文
curing system
  • 調 : Ⅰ動詞1 （配合得均勻合適） harmonize; suit well; fit in perfectly 2 （使配合得均勻合適） mix; adju...
  • 制 : Ⅰ動詞1 （製造） make; manufacture 2 （擬訂; 規定） draw up; establish 3 （用強力約束; 限定; 管束...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  1. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。
  2. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。
  3. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  4. The speed control system is developed based on distance control and high precision elevator car positioning detection technology - efficient operation, excellent riding comfort and accurate car leveling

    以距離控制和高精度轎廂位置檢測技術為基礎的速度調制系統，不僅實現了電梯高效運行並獲得了超乎尋常的舒適感和平層精確度。
  5. Chapter 2 treats the design of digital phase modulation system in frequency hopping mode communication

    第二章說明了跳頻傳輸模式下數字相位調制系統的設計。
  6. Channel equalization for ieee 802. 16 single - carrier modulation systems

    16單載波調制系統的通道均衡技術
  7. An optimal design method for the prototype filter design of the filtered multitone modulation system is proposed

    摘要給出了濾波多音調制系統的原型濾波器優化設計方法。
  8. This method can not only minimize the stopband energy of the prototype filter, but also determines the inter symbol interference power and the transition band energy, which can be used to design prototype filters for both the critically sampled fmt system and the non - critically sampled fmt system

    該方法不僅可以最小化原型濾波器的阻帶能量，還界定了符號干擾功率、過渡帶能量，適用於嚴格采樣和非嚴格采樣濾波多音調制系統。
  9. Afterwards we theoretically analyze and conclude the model of the adaptive modulation system. we find out three kinds of channel model appropriated for actual cannels and draw out pulse response matrix equations

    然後，從理論上分析和推導了自適應調制系統的模型，給出了適合實際通道的三種通道模型結構並推導了脈沖響應矩陣方程。
  10. Bandwidth efficient multilevel coded modulation system based on ldpc codes is described in the last part of this thesis. furthermore, the designing method of combining component code rate and degree distribution is introduced

    介紹了ldpc碼的多層編碼調制系統中，分量碼碼率與度序列分佈聯合最優的設計準則，並給出了相應的理論分析。
  11. After researching on the atmospheric transmission characteristic and light source characteristic, a modulation system based on 2fsk has been developed

    通過對大氣傳輸特性、光源發光特性的研究，研製出一套基於二進制移頻鍵控（ 2fsk ）方法的調制系統。
  12. This dissertation analyses the design idea and method for the direct spreading sequence msk modulate system with an error control function. it gives the matlab simulate result and the performance analysis through the modeling process

    本文闡述和分析了一個帶有差錯控制的直擴序列msk調制系統的設計原理與方法，詳細分析和推導了系統的建模過程並給出基於matlab的模擬結果與性能分析。
  13. Digital modulation is a important part of slltv, and it must meet the demond of slltv. the accomplishment of digital modulation greatly improves the performance and function of slltv, and it greatly promotes slltv research

    而數字化調制系統的完成極大地提高了激光電視的性能和功能，有力地推動了《半導體激光大屏幕彩色電視》項目的研究。
  14. Recently, frequency - hop communication has been widely used in many military wireless communication domain as a secure transmission mode. in frequency - hop transmission, phase modulation system has good performance and high frequency efficiency

    跳頻傳輸模式下的數字相位調制系統具有較高的抗噪聲性能，且能有效地利用頻帶，實現數據的高速傳輸，是一種比較優越的調制方式。
  15. Then, the frequency - hop system is presented. emphasis is placed on the analysis of effect on the phase modulation system which is produced in frequency - hop transmission. at last, we scheme out the fh - mpsk and fh - / 4dqpsk systems according to the frequency - hop communication characteristics

    首先介紹了跳頻通信的通道特性，然後說明了跳頻系統的工作情況，並分析了跳頻傳輸對相位調制系統設計的影響，最後針對跳頻通信的特點設計出跳頻傳輸模式下的fh - mpsk和fh - 4dqpsk系統。
  16. Experiment is carried out on the built power conditioning system, which consists of a pulse transformer and a water blumlein line. hpm is successfully generated

    利用實驗室研製的高功率微波功率調制系統成功地在virca七or負載上得到了hpm輸出。
  17. Adaptive modulation mainly include several problem for example signal shape, channel estimation, all digital receiver and so on. since the channel referring to adaptive modulation is very hostile in wireless transmission channel, its algorithms and architectures used for the modulation and demodulation should be carefully devised and considered. designing appropriate algorithms and architectures of the adaptive modulation are main research goal of this paper to meet the need of flat fading channel and selective fading channel

    自適應調制技術主要包括信號成形、通道估計和檢測、全數字接收等方面的問題，由於自適應調制所涉及的通道是非常惡劣的無線傳輸通道，其調制與解調的演算法和結構必須加以精心的設計和考慮，針對具體所假設的平衰落和選擇性衰落的無線通道情況來設計自適應調制系統的演算法和結構是本文研究的主要方向。
  18. Modular design is adopted in digital modulation system. in this way digital modulation system consist of vedio process module, synchronized drive module, semiconductor laser modulation and system control module

    數字化調制系統採用模塊化設計方法，把系統分為四個功能模塊，即視頻信號處理、同步驅動、半導體激光調制和系統控制模塊。
  19. A serially concatenated iterative scheme ( bpcm - id ) combining low - density parity - check codes ( ldpc ) with multilevel modulation is proposed. differ from other serially concatenated iterative decoding schemes, the whole iterative process of bpcm - id is divided into outer iteration and inner iteration to avoid too much errors feedback to the demapper which may cause severe degradation of decoding performance

    論文提出了一種新的多級ldpc碼的概念、基本特性、構造準則和搜索演算法，給出一種融合mlc / bicm的聯合編碼調制系統框架，與傳統mlc系統區別在於用一個多級ldpc碼取代多個分量碼。
  20. A novel scheme of laser modulation directly by microwave subcarriers in satellite broadband networks

    寬帶衛星網微波副載波光調制系統方案
分享友人
分享到 Line

分享到臉書