調制時延 的英文怎麼說

中文拼音 [diàozhìshíyán]
調制時延 英文
modulation time delay
  • 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...
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  1. After analyzing and comparing different partition rules, md32 pipeline architecture is finally defined, which meets the required instruction function, frequency and timing spec of md32. a complete set of creative design method for risc / dsp md32 micro - architecture is presented, such as parallel design, internal pipeline, central control, etc. thanks to the adoption of these design methodology, control path and data path are separated, circuit delay is reduced, and complex instruction operations are balanced among multiple pipeline stages

    它們將若干復雜指令操作均勻分配在幾個流水節拍內完成，實現了任意窗口尋址等復雜指令操作，將整個處理器的數據通路與控制通路分離，減小了電路時延，從而滿足了risc dsp不同指令功能和系統時鐘頻率的要求，構成了統一的、緊密聯系的、協調的md32系統結構。
  2. And pays emphasis on analyzing the system structure and system flow, the core techniques, the channel characteristic and parameters of dvb - t system. the system adopts some core techniques such as cofdm, a lot of tps ( transmission parameter signalling ) insert and guard interval, and so on. so it can withstand high - level ( up to odb ), long delay static and dynamic multipath distortion

    論文首先描述了數字電視地面廣播的需求條件，技術難點和目前存在的問題，並重點分析了dvb - t系統結構流程，核心技術及系統通道特性和參數，該系統採用了cofdm （編碼正交頻分多路復用） ，大量導頻信號插入和保護間隔技術等核心技術，使之能抵抗高電平（ 0db ） ，長延時的靜態和動態多徑失真，有利於數字和模擬電視的混合傳輸，它的多載波調制模式功能和性能在移動和便攜接收、同頻網等方面具有獨特的優勢。
  3. The system can generate three - phase spwm pulses and has following characters : the range of modulation frequency is from 0 khz to 4 khz. and can be divided to 7 classes to control. the carrier frequency may be selected up to 24 khz, and can be divided to 8 classes to control ; rotational frequency is defined to 16 bits

    該系統能產生三相六路正弦脈寬調制（ spwm ）波形;調制頻率范圍為0 4khz ，分7級控制; 16位的速度控制解析度;載波頻率分8級控制，最高可達24khz ;系統介面兼容intel系列和motorola系列單片機;該系統控制簡單、精確，易修改，可現場編程;同時具有脈沖延時小、最小脈沖刪除、過壓和過流保護功能等特點，可應用於pwm變頻調速系統的全數字化控制。
  4. In the aspect of blind - identification, the mutual power spectrumx time - frequency distribution product of two delay signals are used as the features of classification. the cluster analysis and cumulant invariants of mpsk signals are used to automatically classify communication signals

    在信號識別中，選取信號的互功率譜、時頻分佈、 mpsk信號的延遲相乘信號作為分類特徵，利用模式識別中的聚類分析以及mpsk信號的基於高階累積量構成的分類特徵不變量實現了信號調制類型的自動分類。
  5. Schedule policy based on data services plays a key role on the performance of the hsdpa. considering the priority and delay requirement of service, packet scheduler concentrates on the trade - off between the cell throughput and user fairness

    基於數據業務的調度策略是hsdpa業務的主要保障機制，設備需要根據端到端業務質量的要求，考慮業務的優先級和時延要求的情況下兼顧公平性原則，盡量使小區的吞吐量最大化。
  6. 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。
  7. Subsequently, taking into consideration the characteristics of audio data over internet including delay, jitter, packet loss and etc., we propose a series of methods for solving this above problems, such as pre - storage technology, buffer technology, dynamic adjustment of the voice - coding rate to the state of network and integrated media synchronization playing mechanism, and etc. in the end, simulation on 10 / 100m lan is made using the above methods, and the result of the experiment demonstrates the method has good performance and can improve the quality of the audio data transmission

    其次本文還深入研究了語音數據在非實時的internet數據網上的傳輸特性，這些特性包括延時、延時抖動、數據包丟失等。在本文的設計方案中提出了針對這些問題的解決方法，包括預取機制、設置緩沖區技術、動態速率調節技術以及媒體綜合同步播放機制等。最後採用這些方法在10 100m局域網上做了模擬實驗，實驗結果表明本文提出的方法是有效的，在網路狀況惡劣的情況下能夠改善語音播放質量。
  8. Abstract : this paper developed time domain integral constraints on error response for siso feedback control systems caused by nominal plant ' s near cancellation of stable pole - zero near the j - axis. these integral constraints should be satisfied by any feedback control systems. these integral constraints give new insight into the inherent trade - offs. it will result in the settling time longer or the infinite norm of the error response larger when there are near cancellations of stable pole - zero near the j - axis. hence, when feedback control systems are designed, it is necessary to avoid the compensator ' s poles and zeros nearly cancelling the nominal ' s zeros and poles ( even if these poles and zeros are stable )

    文摘:導出了單輸入單輸出反饋控制系統誤差響應基於名義系統穩定的零、極點近似相消的時間域積分約束，此積分約束是任何反饋控制系統均應滿足的.這一約束給出了單輸入單輸出反饋系統固有折中的新的觀點.名義系統穩定的零、極點近似相消的存在導致反饋控制系統的調節時間延長或者誤差響應的無窮范數變大.因此，在反饋控制系統設計中，盡量避免補償器的零、極點與名義系統的極、零點近似相消（即使這些零、極點是穩定的）
  9. The results show that wavelength locates in gain zone of semiconductor optical amplifier, and have higher peak power and proper time delay between the two pulses for the second order super gauss control pulse in semiconductor optical amplifier. a high quality amplified signal pulse can be achieved. the chirp can be reduced notability by using cascading soa in cross gain modulation based on soa, and the distance and the peak power of conversion optical pulse can be increased notability, and we can let down the demand for wavelength based on xgm in soa and enhance the flexibility of wavelength conversion

    我們應用二階超高斯光脈沖與高斯信號脈沖同時注入soa和應用soa與非線性光學環鏡（ nolm ）相結合的方案來對信號脈沖進行壓縮整形，模擬顯示，在調節系統合適參數的情況下，波長位於soa增益區的二階超高斯控制光脈沖在具有較高的峰值功率和適當時延下輸入soa時，最後可以得到放大的高質量超簡訊號光脈沖；在基於soa的交叉增益調制（ xgm ）全光波長轉換中，採用級聯的soa能有效地使反轉光脈沖的頻率啁啾得到有效降低，波長向下轉換的距離和反轉光的峰值能量都得到明顯提高，降低了利用交叉增益調制（ xgm ）波長轉換中對波長精度的要求，從而提高了波長轉換的靈和性。
  10. Secondly, we apply tk operator to the cross - correlation of received signal code and pn code to separate the multi - paths. it comes to a conclusion that tk operator can separate the multi - paths within less than the chip period accurately of spread - spectrum system with space - modulation by simulation. at last, we apply this algorithm to the practical signal collected by gps tap, and from the result we can drop a conclusion the tk algorithm is practical

    本文首先闡述了時空調制擴頻信號原理以及在多徑干擾下時空調制接收機的性能和teager - kaiser接收機的原理;接著對時空調制擴頻系統的解調信號與偽碼的互相關函數採用tk接收機進行多徑分離，模擬結果表明， tk接收機對時延在一個碼片內的時空調制擴頻通信多徑信號有很好的分離效果;最後用數據採集器對一個gps信號進行接收和多徑的估計，驗證了該演算法在實際的運用中對多徑的擴頻信號有很好的分離效果。
  11. But the spectrum efficiency of the traditional ofdm system is limited due to variance of channel parameters such as channel response and rms delay spread

    但是，決定通信系統調制參數的通道響應和rms時延擴展由於物體的運動或者環境的變化而動態變化，傳統的靜態確定ofdm系統調制參數的方法的頻譜效率不夠高。
  12. A compensation method based on dividing time intervals for time delay of networked control system

    基於時延補償的網路控制系統調度策略研究
  13. The experiment ' s results show that the system is stable under the static pressure control and energy saving under the minimum total supply air volume control. although the terminal dampers ' s tuning time is prolonged under the minimum total supply air volume control, it can be reduced by adopting the appropriate sampling time when debugging the system. from all of this we can conclude thart the minimum total supply air volume control has a good application perspective

    實驗結果表明，定靜壓控制方式下系統較為穩定，最小總送風量控制比定靜壓更加節能，但它延長了末端閥位的調節時間，在系統調試時，我們可通過選擇合適的采樣時間來縮短閥門的調節過程，所以最小總送風量控制具有廣闊的應用前景。
  14. Comparison research verifies its effectiveness on reducing the de - link losses and improving the output performance. the three topologies mentioned above are all presented with detailed theoretical analysis, parameters design, simulation and experimental verifications. a 6kw three - phase inverter system is accomplished in order to verify that the two - amplitude control technique is fit for high power application

    第五章研究三相逆變系統的雙幅諧振直流環節技術，完成了6kw實驗系統，提出了滯環電流控制與空間矢量調制相結合的方案（ hcc - svm ）並首次採用cpld實現邏輯控制，大大降低了逆變器換流頻率，縮短了控制延時，實現了逆變器的高效變換和低輸出失真。
  15. A lot of applications in broad bandwidth ip network are based on non - real - time communication by comparison with atm. we present dynamic virtual rate scheduling policy and limited difference - of - clock hybrid packet scheduling. they do n ' t only guarantee upper bound of traffic delay that is equal to vc and wfq ' s, but also optimize non - real - time communication by way of preventing real - time traffic from unfairly engaging network resource

    相對atm網路，寬帶ip網路中有大量的網路應用以非實時通信為基礎，本文提出了動態虛速率調度策略和有限時鐘差混合包調度演算法，與vc 、 wfq等調度演算法相比，不僅同等地確保實時通信的最小時延上界，而且通過限制實時通信對網路資源的不合理佔用，使得實時通信和非實時通信公平合理地共享網路資源，優化了非實時通信的轉發性能，改善了網路資源的有效利用率。
  16. Then the effects of the more practical issues such as estimation error and the estimation delay are considered, which results in a method that could be used when channel estimation is incomplete

    接著分析了通道估計誤差及通道時延對于自適應調制的影響，給出了在這些實際情況下，切換門限的設定方法。
  17. Theory simulation results show that the methods mentioned are feasible to detect and estimate the short pn sequence modulation ds signals whose pn sequence length is 63 to 1023. the delay and multiply approach can be used to estimate the chip rate of long pn sequence modulation ds signals, and the improved algorithm of it is available in lower input snr. the performance of the

    延時相乘法對長pn碼調制信號pn碼速率估計也適用，其改進法的信噪比容限比改進前降低;二次功率譜法和倒譜法對短pn碼調制有很好的檢測和估計性能，但對長pn碼調制不適用，而基於延時相乘的二次功率譜法可以很好的估計出長pn碼調制信號的pn碼周期。
  18. This dissertation introduces the work principles, hardware circuit structure and application of a pint - sized multifunctional radar echo generator, which can generate various waveforms needed. we can modulate the doppler frequency and adjust the time delay of the waveform to validate the performance the radar system

    該設備體積小、操作簡便、便於攜帶，可模擬lfm 、 nlfm 、單頻、相位編碼等多種脈沖信號波形，具有較寬的多普勒調制和時間延遲調節功能，能有效驗證脈沖壓縮與信號處理單元的工作性能，準確評估雷達系統的分辨力、威力范圍等技戰術指標。
  19. The go sequences are applied to the high - order modulation qs - cdma systems, and for the mpsk and m - qam modulation scheme, the maximum allowable timing delays, the sir expressions and the bit - error - rate ( ber ) results are derived

    作者將go序列用於高階調制qs - cdma系統，獲得了採用mpsk調第vll頁西南交通大學博士研究生學位論文制和m一qam調制時系統最大允許時延限制條件以及s僅表達式。
  20. To develop a flexible coordination mechanism between the human operator and the machine, a petri nets based unified system framework for t3d is proposed, which, follows the concept of supervisory control, and covers the main aspects of the system, such as task modeling, task coordination, and task supervision

    為了建立靈活的人機協調機制，本文基於監控思想，提出了一個基於petri網的大時延遙操作系統框架。該框架涵蓋了任務建模、任務協調，以及任務監控等幾個方面；本文研究了基於petri網的的任務建模方法。
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