snr (signal to noise ratio) 中文意思是什麼

snr (signal to noise ratio) 解釋
信噪比
  • snr : SNR ＝supernova remnant 【天文學】超新星遺跡。
  • signal : n 1 信號，暗號；信號器。2 動機，導火線 （for）。3 預兆，徵象。adj 1 暗號的，作信號用的。2 顯著的...
  • to : adv 到某種狀態；〈特指〉到停止狀態；關閉。 ★也常和動詞結合，略去其後賓語，而構成成語： The door i...
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. The concept of irradiance signal - to - noise ratio ( snr ) on the target plane and the minimum of the irradiance that can be detected by the detector was taken as the beginning, combined with a thorough analysis of the spectrum radiating feature of the target and the sky background, the atmosphere conditions, spectral filtering and the influence that the various components in the system have on the target irradiance on the detector ' s target plane and the background irradiance snr, the equation of the flying bomb ' s effect range affected by the point of burst measuring system is made, and all related factors that have an impact on the effect range are analyzed as well

    從探測器靶面上輻照度信噪比的概念、探測器的可探測輻照度最小值出發，在詳細分析目標、天空背景的光譜輻射特性、大氣條件、光譜濾波技術以及系統各環節對探測器靶面上目標與背景輻照度信噪比的影響的基礎上，推導了炸點測量系統對爆炸的飛行彈體的作用距離方程，分析了影響作用距離的諸因素。
  2. For micro - cavity semiconductor laser, station model is proposed in this paper and its steady - state and instantaneous characteristics when the coupling efficiency of spontaneous emission into a lasing mode is equal to 1 are analysised. for current noise, sp noise, noise, p noise, as well as current modulation, sp modulation, modulation and p modulation, using small - signal approximation, we derive the laser ' s corresponding transfer functions. and we calculate their signal - to - noise ratio ( snr ) gain in various parameters through frequency domain analysis in the premiss of large input snr

    本文對于微腔半導體激光器，提出站模型，能夠較直觀簡潔地分析微腔半導體激光器的穩態和瞬態特性，利用此模型對具有重要實用價值的= 1的微腔半導體激光器進行了討論；對于電流i噪聲、自發發射壽命_ （ sp ）噪聲、自發發射因子噪聲、光子壽命_ p噪聲，以及電流調制、 _ （ sp ）調制、調制、 _ p調制，在小信號近似下，得到了相應的激光器的傳遞函數；在大信噪比的前提下，對激光器進行了頻域分析，分別計算了它們在不同參數下的信噪比增益，分析了其抗噪聲性能。
  3. It has a signal - to - noise ratio ( snr ) of at least 75 db

    它有一個信號雜訊比（信噪比）的至少有75分貝。
  4. Snr signal to noise ratio

    信號噪聲比
  5. 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。
  6. Methods of estimating baud rate, signal to noise ratio ( snr ) and reference phase are investigated. a modified euclidean algorithm is proposed to estimate baud rate of the burst packets. a cumulant based algorithm of estimating snr of star - qam is proposed which has better estimation performance in medium scope of snr

    研究了自適應調制中波特率，信噪比和載波相位等參數的估計演算法；提出一種基於修改的歐幾里得演算法的波特率估計演算法，這種演算法可以對突發分組的波特率做出準確估計；提出一種星型qam信號的信噪比估計演算法，在中等信噪比條件下，具有較好估計性能。
  7. Speech enhancement as the front - end processing module is used to improve the signal - to - noise ratio ( snr ) of the input signal for recognition in the latter stages

    為了讓語音識別系統在安靜的環境和有噪聲的環境中都獲得令人滿意的工作性能，研究了一個將語音增強器和語音識別器級連起來的系統。
  8. Nanc has two adaptive filters : a main filter ( mf ) and a subfilter ( sf ). the signal - to - noise ratio ( snr ) of the input signals is estimated using the sf

    該自適應噪聲抵消系統由主自適應濾波器（ mf ）與分自適應濾波器（ sf ）組成。
  9. 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 ） 。
  10. It is found that the signal - to - noise ratio ( snr ) of the system is affected not only by the coupling coefficient between two noise terms, but also by the noise correlation time t

    研究結果表明，系統的信噪比不僅受到兩種噪聲之間的禍合系數兄的影響，而且受到噪聲相關時間公的影響，即噪聲有色性的影響。
  11. The theoretical analysis and simulation show that the ssnr and the sksnr are equal to or greater than the original signal - to - noise ratio ( snr ), and that employing third order cumulant slices can effectively extract the mot - radiated quadratic phase dynamic coupling signals from asymmetrical distribution noise

    理論分析與模擬表明：切片信噪比、歪度信噪比總是大於相關信噪比；用該演算法十分有效地實現了二次相位耦合信號與非對稱分佈色噪聲的分離。
  12. The main tasks and innovative points of this study as follow : 1. based on the spectrum anlysis, statistical characteristic and snr ( signal to noise ratio ) of hyperspectral remote sensing image, some optimal bands for desertification monitoring was selected

    本研究的主要工作和創新點包括以下幾個方面： 1從光譜特性、圖象的統計特徵和信噪比三個方面討論了高光譜遙感數據波段選擇的方法。
  13. As the pitch doubling and halving problems of nccf algorithm often occurred with varied noises and signal to noise ratio ( snr ), vad algorithm is employed to separate speech and non - speech segments

    針對nccf基音檢測演算法在不同噪聲、信噪比下容易發生清濁誤判的問題，本文在基音檢測前端引入語音檢測演算法劃分語音段與非語音段。
  14. However, as to correlated especially coherent signals and adjacent signals with small signal to noise ratio ( snr ), music algorithm cannot estimate their doa

    然而，對于相關信號（特別是相干信號）以及相隔比較近的小信噪比信號， music演算法卻分辨不了它們的doa 。
  15. 3. studying still image transmission systems without channel coding or with turbo codes over both awgn and rayleigh fading channels by matlab simulation. simulation results show that turbo codes not only advance the dependability of communication systems, but also reduce channel signal - to - noise ratio ( snr )

    將turbo碼應用於靜止圖像傳輸系統，信源編碼採用矢量量化編碼，分別在awgn通道和rayleigh衰落通道下，對不採用通道編碼和採用turbo碼作為通道編碼的各種情況進行模擬。
  16. Stochastic resonance has attracted the attentions in many fields of science in recent decades, but it is a new method and theory in signal processing. in context of signal processing, for signal transmission by nonlinear systems, stochastic resonance is commonly described as an increase hi the signal - to - noise ratio ( snr ) at the output, which is obtained through an increase of noise level or tuning system parameters

    從信號處理的角度來講，隨機共振是在非線性系統信號處理中，輸入為強噪聲背景下的微弱信號，系統輸出以適宜的物理量來衡量，如信噪比，通過調節輸入噪聲強度或系統參數，都可使得系統輸出信噪比達到一個最大值，此時，稱信號、噪聲和非線性系統所產生的協同現象為隨機共振。
  17. Bits transmitted by every subchannel are determined by its value of signal to noise ratio ( snr ), and the unwanted power caused by noise is distributed to every subchannel, so their damage is weakened

    它根據各個子通道信噪比的情況確定其傳送比特數，由噪聲引起的干擾功率被分散到各個子通道中，降低了其引起的干擾。
  18. A new cumulant based algorithm of estimating signal to noise ratio ( snr ) and reference phase is proposed for likelihood ratio classification of mpsk signals, which is blind to unknown phase order of mpsk signals. the asymptotic statistic distribution characteristics of cumulant function estimation of mpsk signals are given

    針對mpsk信號似然比分類中的參數估計問題，提出了在未知調制類型的前提下，基於累量分析的（對調制類型）盲的信噪比和參考相位估計演算法，並理論分析了累量函數估計值的漸進統計分佈特性。
  19. I combine snr ( signal to noise ratio ), put forward an improved dwt algorithm

    將信噪比snr與該dwt演算法相結合，提出了一個改進的dwt演算法。
  20. Through the noncoherent integration of great numbers of data, and by using hough transform the features of signals in low snr ( signal - to - noise - ratio ) can be extracted. therefore, the hough transform may play an important role in the automatic track initiation and the processing of images with low snr environment

    通過大量數據的非相干積累，利用hough變換可在低信噪比下提取信號特徵，這在低信噪比自動航跡起始以及低信噪比圖像處理中有重要的應用價值。
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