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carrier wave

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carrier wave 【無線電】載波。

【無線電】載波。 “carrier“ 中文翻譯：   n. 1.運送人，搬夫；負荷者；使役，〔美國〕信差，郵遞 ...“wave“ 中文翻譯：   n. 1.波浪；碎浪； 〔the wave(s)〕 〔詩 ...“wave carrier“ 中文翻譯：   載波“carrier current wave telegraph“ 中文翻譯：   載波式電報“carrier wave component“ 中文翻譯：   載波部件“carrier wave disconnection“ 中文翻譯：   搬送波斷“carrier wave jamming“ 中文翻譯：   載波干擾; 載波擁擠“carrier wave outgoing“ 中文翻譯：   搬送波送出“carrier wave telegraphy“ 中文翻譯：   載波電報“carrier wave telephony“ 中文翻譯：   載波電話“carrier-wave jamming“ 中文翻譯：   載波干擾“cw carrier wave“ 中文翻譯：   載波“cwt carrier wave telegraphy“ 中文翻譯：   載波電信技術“floating-carrier wave“ 中文翻譯：   載波不定波“frequency of the carrier wave“ 中文翻譯：   載波頻率“interrupted carrier wave“ 中文翻譯：   斷續載波“modulated carrier wave“ 中文翻譯：   已調載波“modulated carrier wave (mcw)“ 中文翻譯：   調變載波“modulated wave carrier“ 中文翻譯：   已調載波“sine wave modulated carrier“ 中文翻譯：   正弦調制載波“sine-wave carrier“ 中文翻譯：   正弦載波“square wave carrier“ 中文翻譯：   矩形波載波“square-wave carrier“ 中文翻譯：   矩形載波“sub-carrier wave“ 中文翻譯：   副載波“suppressed carrier wave telephony“ 中文翻譯：   抑制載波式電話

This system of modifying the carrier waves is called “ amplitude modulation , “ or “ am “ 這個改變載波的系統稱為“振幅調制”或縮寫為“ am ” 。

This system of modifying the carrier waves is called “amplitude modulation,“ or “am“ . 這個改變載波的系統稱為“振幅調制”或縮寫為“AM”。

This system of modifying the carrier waves is called “ amplitude modulation , “ or “ am “ 這個改變載波的系統稱為“振幅調制”或縮寫為“ am ” 。

This system of modifying the carrier waves is called “amplitude modulation,“ or “am“ . 這個改變載波的系統稱為“振幅調制”或縮寫為“AM”。

carrier-based

Abstract : by introducing chaos state to genetic algorithm , this paper proposed a novel optimization algorithm named chaos genetic algorithm . its major measures are chaos initialization and chaos carrier wave of best fitness in population both based on the ergodicity , stochastic property and regularity of chaos . simulation results of typical complex function optimization show that chaos genetic algorithm improves the convergence and reduces the computing time greatly 文摘:將混沌融入遺傳算法提出了混沌遺傳算法，該方法利用混沌運動的隨機性、遍歷性、對初始條件的敏感性特性進行群體的混沌初始化和最優個體的混沌變尺度載波尋優.典型復雜函數優化的仿真結果表明該方法較遺傳算法具有更快的收斂速度和更小的計算量，是復雜函數優化的有效手段

Since pico - satellite could already basically communicate with carrier wave , my major approach is to optimize the communicator ' s performance , to process the follow - up connect and charactization after data modulation , to present primary reliability design and simulation so as for the whole system to satisfy engineering needs 本人的主要工作就是在前人的基礎上進一步優化通信機的性能指標，同時進行數據調制后的聯試，并且進行初步的仿真和可靠性設計，使整個系統能滿足工程化的要求。

These character based on sichuan power network ' s practice operation experience , in allusion to the config of the carrier wave protection in bypass breaker operating , through the study of protection ' s typical config : one side lfp - 902a , one side csl - 101a , proceeded comprehensive act module test , noted plenty of first hand test data and wave picture , proceeded detailed theory analyses , plenitude demonstration atresic type carrier wave distance protection when twain side atresic type logic is not completely same , basically can fill power network ' s requirement to relay of reliability selectivity speedly and sensitively 本文結合四川電網的實際運行經驗，針對旁路開關代路運行時的保護配置情況，通過對旁路代路時保護典型配對組合：一側lfp - 902a ，一側csl - 101a的保護配置情況的深入研究，做了全面的動模試驗，記錄了大量的第一手試驗數據和波形，進行了詳細的原理分析，充分驗證了高頻閉鎖式距離零序保護在兩側閉鎖式邏輯不盡一致的情況下，基本能夠滿足電網對繼電保護的可靠性、選擇性、快速性以及靈敏性的要求。

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信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,介紹了采用直接調制技術模擬衛星信號的射頻前端的設計;最后,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。

This d format can show the range of the data intuitively and express the real time data , which improves the speed and precision of svpwm arithmetic greatly . the ratio of carrier wave is increased and the blend of current is reduced , as a result the performance of the system is ameliorated . this thesis project has finished the debugging of the ac motor control system , and the result shows that hardware and software of the designed system is in reason 在實現svpwm算法的匯編程序中采用了一種新型的d定標法對標幺化的數值進行定標，這種d定標法能直觀的表示數值的大小范圍，可以實時的對數值進行定標，提高了svpwm算法執行的精度和速度，增加了逆變器的載波比，減少了電流諧波，因而改善了交流變頻調速系統的性能。

The third part of the work concerns the main influencing factors of the system low frequency oscillation , the small signal mathematical model of the inverter induction motor is established in the stator reference coordinate , effects of the motor parameter on the system low frequency oscillation are researched . then , by the analysis of the inverter nonlinear working characteristic , the internal relationship between the inverter dead time and the low frequency oscillation is studied and clarified , and the effects on the system low frequency oscillation are taken into account , which are produced by the dead time and change of carrier wave frequency of the inverter 首先建立了固定于定子坐標系中pwm逆變器-異步電動機小信號模型的基礎，研究電機參數對系統低頻振蕩的影響；其次，通過逆變器非線性工作特性的分析，研究并揭示了逆變器死區時間與系統低頻振蕩的內在關系，考慮逆變器死區時間、載波頻率的變化對系統低頻振蕩的影響；最后總結出提高和改善系統穩定運行的電機設計和逆變器v / f _ c曲線設置準則。

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 本文采用了一種基于fpga的通用數字調制解調方案,該方案在調制端采用了正交平衡調制技術,在解調端采用了中頻帶通采樣、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。

Bypass breaker usually operate instead of line breaker in power system , considering the type of bypass breaker ' s carrier wave protection is different from the one of line versus side carrier wave protection , both protection ' s theory and stop signal , send signal logic have got differentiate , in order to ensure power network stabilize operation , line rapid protection must be run , so it is necessary to validate from protection theory and proceeding test the internal fault condition that the protection in both side of the line is different 電網中經常出現旁路開關代線路開關運行，由于旁路高頻保護和線路對側高頻保護型號不一致，保護原理和停信、發信邏輯有區別，為了保證電網的穩定運行又必須要求線路快速保護投入運行，這就要求從保護原理上和進行試驗來驗證此時由線路兩側不同的保護裝置構成的高頻保護的動作情況。

In this paper , the on - off procedure and drive mode of high - speed on - off valves are introduced , the principle of pwm most in use recently is introduced . based on the forming method of pwm signal with software , the conclusion is drawn that the occupancy of pwm signal is only in relation to the control value calculated and the mean flowrate is linear to the control value when the carrier wave ( cycle and amplitude ) is chosen 論文介紹了高速開關閥的開關過程和閥的驅動方式。介紹了目前最常用的流體脈沖控制方法?脈寬調制的機理。介紹了pwm信號的軟件生成方法,并由此證明,高速開關閥可以實現流量與控制量成正比的模擬控制所能實現的伺服控制功能。

Some methods are put forward for improving the convergence rate of the coa ( chaos optimization algorithm ) based on second carrier wave , which can greatly increase the velocity and efficiency of the first carrier wave to search for the optimal point at comparatively rough precision , and the refined search can be performed during second carrier wave more quickly as well as accurately 摘要針對一般的基于二次載波的混沌優化方法收斂慢的弱點，提出了一些改進的方法，大大提高了首次載波尋找最佳點大概位置的速度和效能，同時能更快更精確地實現二次載波的精細搜索。

In this paper we can realize optic - electricity transform by the modulation , demodulation , coding , decoding for the signal ; we can enhance the anti - jamming and secrecy performance of the system by means of the encrypted communication ; we designed all sorts of the functional circuit module in reason , and enhanced the net - jointed flexibility of the system ; which operates expediently and has friendly interface by adopting the phonetic circuit ; we adopts mostly the scm technology , which has better expansibility and lower cost . we here has successfully proposed the solution for the remote - transmission of the irda device in the system design and debug process , and discuss and analyze the carrier wave in the electric power 本文通過對信號的調制、解調、編碼、解碼實現了光電轉換；采用了通訊加密的方法加強了系統的抗干擾能力和保密性能；合理地設計了系統各功能電路模塊，提高了系統聯網的靈活性；由于采用了語音電路，使得系統操作方便，富有人性化；在控制電路中主要采用單片機技術，不僅價格低廉，而且具有很好的擴展性。在系統設計、調試過程中，很好地解決irda器件不能遠距離傳輸的問題，并對電力線載波也進行了探討和分析。

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,并按照數字音頻接口標準對音頻數據、同步字和附加信息進行信道復用;對于載波信號,采取鎖相環頻率合成技術手段;對于頻率調制,采用壓控振蕩器;對于解調電路,采取鎖相環鑒頻電路。

There are five parts are as follows : in part one , the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration , then the low frequency oscillation of the system is simulated according to the model . next , from the view point of energy conversion of the inverter - induction system , a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not 首先引入開關函數概念，建立了正弦脈寬調制( spwm )逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大于1 / f _ c ( f _ c為逆變器載波頻率)來判定系統是否出現低頻振蕩；最后的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。

According to the proposal , two millimeter - wave phase locked sources are locked on a crystal oscillator . the one of the phase locked source is used for steady carrier wave in transmitter , the other is used for local oscillator . through the proposal , coherent transceiver front - end is achieved 本方案采用同一晶振源為收發兩個毫米波鎖相源作參考頻率,其中的一個鎖相源用于產生高穩定的發射載波頻率,另一個用于產生高穩定的本振信號,從而實現收發的相參性。

As a result , a kind of new testing instrument for electric wire high frequency carrier wave channels is investigated and developed in this paper . the characteristics and shortcomings of the existing testing instruments are analyzed , and a new intelligentized testing instrument based on dsp technology is designed 論文分析了目前所用的測試設備的特點和不足，介紹了dsp技術的發展及特點，提出了基于dsp技術的智能化的電力線載波通道測試裝置的新方案。