相乘信號 的英文怎麼說

中文拼音 [xiāngchéngxìnháo]
相乘信號 英文
multiplying signal
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 號 : 號Ⅰ名1 （名稱） name 2 （別號; 字） assumed name; alternative name3 （商店） business house 4 （...
  • 相乘 : multiplication
  1. We select ni / cr alloy resistor as element together with ceramic embedding hearth ; select small flat - and - disc heat - even hubby ceramic sample holder, select ni / cr & ni / si thermoelectric couple ( type k ) as thermoscope with threads 0. 5 mm in diameter which is installed in the middle of the holders symmetrically ; select aluminum silicate fire - retardant fiber as materials for heat preservation ; design some hardware, for example temperature controller & transporter, signal amplifier etc ; design controlling curve to heat stove ; and introduce the method of least squares nonlinear regression and subsection function to deal with data. in order to obtain the reasonable operation conditions and operation curve, we have also done many theory analysis and experiment discussions

    通過理論和試驗探討，選用鎳鉻合金電阻絲作為加熱元件，配以陶瓷質埋入式爐膛；選用陶瓷質小尺寸扁平?圓盤均熱塊體型樣品支持器；選用0 . 5mm絲徑鎳鉻?鎳硅熱電偶（ k ）作為測溫元件；熱電偶對稱安置在樣品支持器容器的中部；選用硅酸鋁耐火纖維作保溫材料；合理選用和設計了溫度控制器、溫度變送器、信號放大電路等硬體；採用升溫曲線來控制爐膛供熱過程；採用最小二乘法非線性回歸與分段函數相結合的曲線模擬方法，進行圖形處理。
  2. Two detection methods of chirp signals are presented in the dissertation : the cyclic autocorrelation detection method and the correlation detection method of cyclic autocorrelation function. it is shown that the two methods both have an excellent performance of blind detection. the performance analyses of the two detection methods are both carried out for additive noise or multiplicative noise, and the output signal - to - noise ratio ( snr ) expressions of the two methods are also derived

    通過研究提出了兩種線性調頻信號的檢測方法?基於循環自相關函數包絡的檢測方法和基於循環自相關函數的相關函數包絡的檢測方法，兩種方法均可實現信號的盲檢測，有良好的檢測性能，文中還分析了加性噪聲及存在乘性和加性噪聲情況下兩種檢測方法的性能，推導出了輸出信噪比公式。
  3. In this modified algorithm, channel estimation is made by dispreading the received signal of dpcch with a corresponding long gold sequence and pilot ovsf, followed by averaging

    本文將dpcch中的導頻信號解擾、解擴，再將它們與已知導頻信號相乘得到的通道估計值進行平均，從而得到最終的通道估計值。
  4. Secondly the detection precision is only related to the synchronization phase but not to the amplitude of the mainline voltage because that it uses the optimized pulses synchronous with the mainline voltage as modulation signals. thirdly it decreases the requirement of the input low pass filter and eliminates the error resulting from the direct component and even harmonics of load current. the most significant merit is that it can eliminate the effect of a few low order odd harmonics and the detecting circuit is easy to be implemented

    模擬和實驗結果表明該方法的主要優點有：不需使用乘法器進行信號調制，調制信號採用與電網電壓同步的優化特定脈沖，其檢測精度只與同步相位有關，而與電網電壓幅值無關；降低了對輸入低通濾波器的通頻帶要求，直流和偶次諧波分量對檢測精度沒有影響；突出的優點是可以消除有限個低奇次諧波對檢測結果的影響。
  5. 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。
  6. Shortly before 5. 45 am, police received a 999 report which indicated that an explosion had occurred at a bus stop outside a cafe at 19 tseng choi street in tuen mun. upon receiving the call, police officers, firemen and ambulencemen immediately arrived at the scene and learned that two men were seen placing an unknown object, initially believed to be fireworks, either next to or inside a rubbish bin at a nearby bus stop. they then fled the scene in a private car which was identified

    今早約五時四十五分，警方九九九電臺收到市民報告，指屯門井財街十九號一間小餐館外的巴士站發生爆炸，警員、消防員及救護員隨即趕赴現場，並獲悉有兩名男子曾將一件初步相信是煙花的物體放在附近一個巴士站的一個垃圾箱內或附近，之後兩名男子迅即乘坐一輛私家車逃走，而該輛私家車亦被認出，事件中，一名五十歲男子及一名二十七歲女子受輕傷送屯門醫院治理。
  7. The jamming of multiple noise and the polynomial phase modulation caused by non - uniform relative motion are the main problems in mmw doppler guidance radar signal processing

    乘性噪聲的干擾和非勻速相對運動所引起的多項式相位調制是毫米波多卜勒制導雷達信號處理中所面臨的主要問題。
  8. With the method of integral within ordered product of operators, we obtain the analytical expression of quantum information counterpart of mutual information. the coherent information, as a function of input thermal state power and thermal noise channel power, we discuss the upper and lower bound for quantum gaussian channel introduced by holevo - werner and by quantum codes

    用正規乘積內的算符積分技術求出了互信息的量子對應物? ?相干信息用輸入熱噪聲信號功率和通道熱噪聲功率表示的公式。討論了由holevo和werner引入的量子高斯通道量子容量的上界及由量子編碼所確定的下界。
  9. Secondly, with combination of a certain type of radar, the application of genetic algorithm to optimum code selection and the iteratively reweighted least - square mismatched filter design for sidelobe reduction are discussed. the favorable experimental results are obtained, especially for 64 phase code

    最後，我們結合某型雷達，以64相碼信號為例，說明了遺傳優化演算法在編碼搜索中的優越性，並採用了迭代加權最小二乘演算法來設計失配濾波器以達到相位編碼信號的優化副瓣抑制目的，且給出了相應的模擬結果。
  10. One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system

    第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。
  11. In order to reflect the characteristics of amplitude increase and frequency changing of seismic signal, a new automatic recognition method of seismic phase is developed based on the instantaneous amplitude and instantaneous frequency

    摘要為了充分反映地震信號振幅增大和頻率改變的特徵，發展了一種以振幅和瞬時頻率比乘積為特徵參量的震相自動識別方法。
  12. For the issue of blind parameter estimation of dsss / bpsk signal damaged by strong additive white gaussian noise ( awgn ), this dissertation mainly researches on carrier doubler method ( cdm ), auto - correlation method ( acm ), delay - and - multiply ( dm ) method and fourth - order cumulant 2 - d slice method

    針對受強高斯噪聲污染的dsss / bpsk信號對抗技術中的盲參數估計問題，本文著重研究了平方倍頻法、時域自相關法、延遲相乘法三種常規的單參數估計法以及四階累積量2 - d切片多參數估計法。
  13. A new denoising method based on combining multi - scale product with wavelet shrinkage is presented

    摘要提出一種將相鄰尺度的小波系數乘積與小波閾值收縮相結合的信號去噪方法。
  14. In this thesis, the ood method and such technologies as mfc, api, dll, and multi - thread will be talked about. secondly, pca and pls ca n ' t deal with time dependent data, and arma model can be used to solve this problem, but the problem of arma structural modeling must be solved

    2 ）針對主元分析法、偏最小二乘法這兩種降維技術不能處理序列相關的動態數據的問題，可以用arma模型提取出動態數據中的序列獨立的擾動信號，但首先必須解決arma的結構建模問題。
  15. Secondly, the delay and multiply approach is used to detect the ds signals and estimate the chip rate of pn sequence, and then an improved algorithm is proposed. the algorithm is deduced and the theory simulation results are given

    然後採用延時相乘法對直擴信號進行了檢測和pn碼速率估計研究，提出了改進演算法，給出了演算法推導和理論模擬。
  16. The square detection can picks up the carrier frequencies, which is simple and has great performance. but this method can ’ t recognize the signal as spread spectrum signal. the spectral correlation detection method can estimates the chip rate of signal ’ s pn sequence

    然後，針對異步的cdma信號，採用延遲相乘的方法檢測用戶數目，同時估計出各用戶信號的幅值和相位;該方法的缺點是各用戶信號必須有一定的相差，同時用戶數不能太多。
  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. The research object of traditional dm method is the output of base - band dsss / bpsk signal delay and multiplication processing or the base - band component of output of if dsss / bpsk signal delay and multiplication processing

    傳統的延遲相乘法研究對象是基帶信號的延遲相乘輸出，或中頻信號延遲相乘輸出的基帶部分。
  19. Authorities say the crew sent forward distress signal shortly before the crowded passenger jet slammed into the ground

    相關部門聲稱，就在這架滿載乘客的飛機摔到地面之前的短時間內，飛機機組人員發出了求救信號。
  20. Ds - ss bpsk signal detection with delay multiplication multi - correlation based on over - sampling

    信號延遲相乘多重相關檢測
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