modulation distortion 中文意思是什麼

modulation distortion 解釋
調制畸變
  • modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
  • distortion : n. 1. 歪扭，扭曲。2. 【電學】（信號、波形等的）失真；【物理學】（透鏡成像產生的）畸變；【醫學】扭轉，變形。3. 竄改，歪曲，曲解。adj. -al
  1. Acoustooptical modulation and its wave distortion analysis

    聲光強度調制和失真波形分析
  2. In the digital mobile communication, with the effect of modulation, transmission channels and demodulation, the received signal ineluctably has some distortion. frequncy offset is one of them

    在移動通信系統中，信號經過調制發射、通道傳輸和接收解調的過程中，不可避免的會引入一些干擾，使得有用信號受到影響。
  3. Furthermore, the range of measurement of it was pointed out. all the analysis shows that our crsi 1il can be used to measure the spatial mid and low frequency wavefront distortion. 5. based on our crsi and algorithm, the phase modulation characteristic of an lcslm was measured

    五、利用環路徑向剪切干涉儀共光路、雙光束干涉的特點，全場準確測量了液晶空間光調制器的位相調制特性，並且利用它的位相調制特性實現了臺階位相板畸變波前的補償，由此證明了液晶空間光調制器可用於控制波前畸變。
  4. A type of telegraph distortion in which the significant intervals of the modulation do not all have their exact theoretical durations

    一種電報失真，其中調制的有效間隔不都具有精確的、理論上的寬度。
  5. 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
  6. The theoretical analysis and result of simulation indicate that the two - phase modulation reduces the switching losses 50 % relative to the quasi - optimum and the space vector modulation and overmodulation can generate higher voltages with low total harmonic distortion

    分析表明二相調制方法相對于準優化方法減少開關損耗近30 ，空間矢量的調制與過調制可以大大的提高直流母線電壓的利用率。
  7. For lfm signal, we demonstrate the method of employing hamming weighting, spectrum correcting and phase modulation distortion

    對線性調頻信號的旁瓣抑制介紹了經典海明窗加權處理方法、頻譜修正以及相位預矯正幾種方法。
  8. The three - phase high - frequency ac pulse density modulation ( pdm ) converter, which is proposed in this paper, can efficiently synthesize low - distortion variable frequency variable amplitude low frequency voltage signals from the fixed - frequency voltage of the high frequency link

    本文闡述的高頻交流脈沖密度調制（ pdm ）的控制策略能夠較容易地將高頻交流信號低失真地合成幅值和頻率變換的低頻信號。
  9. Results are given for a series of two - tone inter - modulation distortion measurements. it is shown that a 25 db improvement in the inter - modulation margin can be achieved

    實現了一個890 915mhz的功率放大器的前饋線性化試驗，其雙音法測試結果表明，放大器的線性度提高了約25db 。
  10. The reasons of the signal distortion are analyzed, and the relations of receiving bandwidth with distortion degree is discussed, for the more a steady point in the amplitude modulation signal is given by the method of the statistics. looking at the point as the timing reference point of the receiver, the stability of the receiver is less than 100us

    分析了接收信號失真和受干擾的原因所在，論述了接收帶寬和失真程度的關系，並在此基礎上，利用統計的方法在調幅信號的下降沿上找到了一個較為穩定的特徵點，將其作為接收機的定時參考點，定時不確定度可以達到數十微秒量級。
  11. Measurements of the electrical properties of transmitting tubes - measuring methods of dual tone inter - modulation distortion of linear amplifier tubes

    發射管電性能測試方法線性放大管雙音互調失真的測試方法
  12. Second, based on the theory of synthetic discriminant function, several sub - reference images were synthesized to form the reference image base to realize rotation distortion - invariant recognition, which also solved the ill - problem of synthesizing a single reference image with the whole training distorted images and made the pose estimation easier. third, the phase - encoding and amplitude modulation distortion - invariant jtc for multi - target recognition were described

    其次，論文採用綜合識別函數方法構成子參考圖像，建立參考圖像庫的方法解決了目標旋轉畸變不變的識別問題，克服了由大量訓練圖像合成單幅參考圖像時，高頻信息損失嚴重的病態問題，並可實現對真實目標旋轉姿態的估計。
  13. Although dm can also solve the modulation time error, but the output waveforms can ’ t reach the industrial standard ( total harmonic distortion thd ). considering this, a new control strategy called current optimal control ( coc ) is presented in paper. coc is that system samples the output value real time, comparing with expected value, considering all switching actions available then draw a concluding to decide which way would be fastest and best way to render system smooth

    針對這一缺點，本文提出了一種更好的控制策略，電流最優delta調制，它是在電流滯環控制的基礎上，根據電路的輸出信號來分析，考慮所有可能的逆變器動作來決定選用哪一種開關轉換方式能最快最平穩地達到預期值，採用的是一種電流預測控制手段，從而使輸出波形的紋波最小。
  14. Measurements of the electrical properties of transmitting tubes - methods of measuring the inter modulation distortion of a three tone signal

    發射管電性能測試方法三音互調失真的測試方法
  15. The frequency difference sensitivity of the modulation mode and the ability to overcome distortion by limiting amplitude of the signal and to overcome interference also affect the performance, too. in this paper, the relationship between the ability to overcome interference and the modulation mode is discussed at first. then the characters in some aspects specif ' ed above of some common modulation mode such as mfsk mpsk ofdm are studied. on this base, some according solutions to the problem of the different frequency - hopping system are put forward. in the past half of this paper, the realization scheme, pcrforemance and improving measures of ofdm are studied

    本文首先較詳細地討論了跳頻抗干擾的能力與調制制度的關系，接著分別研究了幾種常用調制方式（ mfsk ， mpsk ， ofdm ）上述幾方面的性質，針對各跳頻系統存在的問題提出了相應解決方案，在本論文後半部分重點討論了ofdm跳頻系統的實現方案、性能及改進措施。
  16. Results are given for a series of two - tones inter - modulation distortion measurements and the im3 is 48dbc. it is shown that a 24db improvement in the inter - modulation margin can be achieved when the amplifier ’ s output is 49dbm. and the efficiency of the whole system is 27. 8 %

    經雙音測試證明，本系統在輸出總功率為49dbm時，三階互調產物抑制比為48dbc ，較未加入線性化系統前改善了24dbc ，此時系統總效率為27 . 8 % 。
  17. Introduction to communication systems ? analysis and design of communication systems ; analog and digital modulation and demodulation, frequency conversion, multiplexing, noise and distortion ; spectral and signal - to - noise ratio analysis, probability of error in digital systems, spread spectrum

    通信系統基礎：通信系統分析和設計，模擬和數字調制和解調，頻率轉換，統計復用，噪聲和失真；譜分析和信噪比分析，數字系統誤碼率，擴展頻譜。
  18. The fundamentals of lfm ( linear frequency modulation ) signals, waveform parameter design, system control, quality analysis and pre - distortion calibration are discussed in this paper

    本文討論了線性調頻信號的基本理論，研究了信號參數設計、系統控制、性能分析與預失真校正。
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