oversampling 中文意思是什麼

oversampling 解釋
采樣過密
  1. The architecture and design methods of - modulators are studied. based on it, the bits of quantizer, oversampling - ratio and the orders of modulator have been designed

    對調制器的結構和設計技術進行了研究，根據系統要求設計了量化器位數，調制器過采樣比和階數。
  2. Two block time - recursive algorithms are developed for the efficient and fast computation of the 1 - d rdgt coefficients and for the fast reconstruction of the original signal from the coefficients in both the critical sampling case and the oversampling case. the two algorithms are implemented respectively by a unified parallel lattice structure. and the computational complexity analysis and comparison show that the proposed algorithms provide a more efficient and faster method for the computation of the discrete gabor transforms

    首先論證了一維rdgt系數求解演算法和由變換系數重建原信號演算法，不論是在臨界抽樣條件下還是在過抽樣條件下，都同樣具有塊時間遞歸特性，並提出了相應的塊時間遞歸演算法及其并行格型結構實現方法，計算機模擬驗證了并行格型結構實現的可行性，計算復雜性分析與比較也說明了rdgt塊時間遞歸演算法的并行格型結構在計算時間方面所具有的高速和高效性能。
  3. The mathematic models of sampling and reconstruction are analysed respectively, and an important conclusion is got, that oversampling can decrease high frequence distortion of d / a output signal and the difficulty of designing lowpass filter. as a result the signal quality is improved

    分析了采樣和重構的數學模型，得出了一個重要結論:過采樣可以減少d / a輸出信號的高頻端衰減失真，可以降低低通濾波器的設計難度，從而提高波形質量。
  4. Sigma - delta modulator, combined with oversampling, effectively attenuate the in - band quantization noise in the output signal and enhance the signal - to - noise ratio ( snr ) through the shaping of the quantization error

    調制器與過采樣相結合，對量化誤差噪聲進行整形，有效衰減輸出信號的帶內量化噪聲，提高了輸出帶內信噪比（ snr ） 。
  5. In contrast, oversampling converters can be implemented using simple and high - tolerance analog components

    然而，過采樣轉換器的模擬部分可以使用簡單和對誤差不敏感的器件實現。
  6. It was proposed that oversampling is necessary by analyzing the influence of different sample frequency on the decomposition of sine wave

    對單頻正弦信號的分析結果表明，應用局域波分解對信號進行分析時，要對信號進行過采樣。
  7. Based on analyzing the error source, a method is proposed in this paper which uses oversampling and average filter to improve the system ’ s stability and accuracy

    通過分析誤差來源，提出了採用過采樣及平均值濾波的方法提高測量精度及穩定性。
  8. Moreover, sampling at high frequency eliminates the need for abrupt cutoffs in the analog anti - aliasing filters. a technique of noise shaping is used in - converters in addition to oversampling to achieve a high - resolution

    由於在- a d轉換器中使用噪聲整形技術和過采樣技術，可以用一個簡單的模擬電路加上復雜的數字電路使整個a d達到一個很高的轉換精度。
  9. The main works and innovations of this thesis are as follows : ( 1 ) based on the oversampling of ofdm frequency response, this paper proposes a channel estimator which combines the comb - pilot - tones partitioning and the fourier transform with the same pilot symbol samples

    具體而言，主要有以下六個方面的工作和創新點： （ 1 ）利用在ofdm系統中通道的頻域響應是過采樣的特性，提出了在頻域內用均勻梳狀分佈的導頻符號和與導頻符號數相同點的傅里葉變換相結合的通道估計方法。
  10. The proposed modulator uses 0. 35um standard cmos process, the nmos and pmos threshold voltage is 0. 54 volt and - 0. 48 volt, respectively, and the power supply is 1. 5 volt. the nyquist converter rate is 50 khz, oversampling ratio is 80. the proposed modulator can obtain 98db dynamic range, 16 bits converter resolution, and fits for high - fidelity, digital - audio application

    本設計採用0 . 35微米標準cmos工藝，其中nmos和pmos晶體管的閾值電壓分別為0 . 54伏和- 0 . 48伏，電源電壓為1 . 5伏，奈奎斯特轉換率為50khz ，過采樣率為80 ，該調制器可實現動態范圍98db ， 16位的轉換精度，適合高保真數字音頻應用。
  11. By the uart and rs232, devising the communication circuit with pc. 7. by the way of oversampling, making the system stabler

    使用了c8051f021的uart口和pc機的rs232口，設計了sw2000和上位機進行通信的電路。
  12. A local nonlinear feedback loop ( lnfl ) technique and a sigma - delta modulator ( sdm ) for promoting highly stable oversampling using the lnfl technique

    一種局部非線性回授?路法，以及並利用此一局部非線性回授?路法改良之高穩定性超取樣積分三角調變器。
  13. Most of the lectures on nbi suppression assume that the spread spectrum signal and the background noise are white. this assumption cannot stand up in digitalized receiver because of the if oversampling and digital low pass filtering in digitalized receiver. the code - aided optimal filtering is studied extensively in the circumstance of oversampling and colored background noise

    以往的擴頻抗干擾文獻多將擴頻信號和背景熱噪聲假設為白噪聲，由於在數字正交解擴解調中採用過采樣和數字低通濾波，這一假設在數字化擴頻接收機中並不成立。
  14. The principles of sigma - delta modulator have been discussed firstly and the influences of structure and parameters on resolution have been analyzed. then on the base of theories, the simulink toolbox of matlab has been used to make behavior simulation and fft analyse of two main structures : 2 - 1 - 1 and 2 - 2. the related parameters of modulator such as : psd, sndr and enob have been gotten by simulink toolbox on the conditions of different oversampling rates. from the analyses above, topology of modulator has been chosen

    調制器的原理進行了介紹，分析了各種結構及參數對調制器精度的影響;其次，在理論指導的基礎上，利用matlab的simulink工具包對調制器兩種主要級聯結構: 2 - 1 - 1和2 - 2結構進行了行為級模擬和fft分析，得出了在不同過采樣率條件下，兩種結構調制器的功率譜密度、信噪失真比以及有效位數，通過比較確定了調制器的拓撲結構。
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