wideband noise 中文意思是什麼

wideband noise 解釋
寬頻帶噪聲
  • wideband : 多種頻率的
  • 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〉...
  1. Fourthly, a wideband and low noise ladar receiver is manufactured

    研製了一種寬帶低噪聲激光雷達接收機。
  2. The use of interferometer to detect and analyze laser radiation is well known, but when the intense ratio of the laser radiation to the background natural light radiation is too small, the laser radiation cannot be detected. a novel more sensitive method for detect of wideband weak incident laser in strong background noise is introduced in this paper. the optical unit uses two wedge interferometers and two line array detectors. the incoming light radiation is divided into two beams and through the interferometers

    在被動激光偵察告警中，對微弱脈沖激光信號的探測是一個難點。當探測距離相當遠或視場內接收的背景光輻射很強時，脈沖激光信號到達探測器的能量很小，會淹沒在強大的背景光信號中而探測不到。本論文提出了一種探測微弱脈沖激光信號的方法，可對強烈背景光中的激光威脅信號進行探測和告警，並給出其波長參數。
  3. Because the noise that affects radio signals is partly, but not completely, manifested in amplitude variations, wideband fm receivers are inherently less sensitive to noise

    因為影響到無線電信號的噪音只是部分的，而不是整體出現于波幅變化中，調頻寬頻的接收器自身對噪音不夠敏感。
  4. So, the emphases are put on this part. first, all sources of noise are analyzed and calculated to determine the parameter of component and estimate the feasibility of the system. second, on the one hand, low noise wideband and high gain amplifier is detailed particularly in the design of hardware, on the other hand, several mathematical methods are introduced to reduce the noise further in the design of software

    首先，詳細分析了整個系統的噪聲來源，計算可能出現的噪聲，在器件的選擇上對參數提出要求，並分析方案的可行性；其次，在硬體設計上，兼顧帶寬，噪聲與放大倍數；在軟體設計上，採用累加平均，最小二乘擬合等信號處理方法，進一步降低噪聲。
  5. In chapter 3, under the wideband radar system, some parameter estimation methods of scattering center are studied in the white noise and clutter background

    第三章以寬帶階梯變頻雷達為研究背景，在白噪聲和雜波條件下，研究了提取目標強散射中心的參數估計方法。
  6. In the first part of this paper, the theory of laser range and dds technology was introduced, the factors of influencing range precision were also analysed. at the same time, put forward in the paper, with using the fpga embedded technology, the wideband and high resolution sin modulating signals can be generated easily, then analysed the noise of the dds ; in the second part, the theory of phase measurement based on fft was analysed. in the phase range system, by using the fft operation, the resolution and sensibility of phase measurement can be enhanced ; then some circuits were designed and come true, also simulated and validated ; in last part, the improvement of the phase range system was brought forward, summarized and expected

    論文首先闡述了激光測距和調制信號源的基本原理，分析了影響測距精度的因素，指出應用dds技術可以實現寬帶、高精度的調制信號輸出，說明了引起dds輸出信號雜散的原因和解決的辦法;同時分析了應用fft運算實現信號相位提取的基本原理及設計方法，採用這種檢相技術，可以極大地提高測相精度與靈敏度;然後提出了基於fpga嵌入式系統的相位式激光測距機的整體設計，並就各部分進行了詳細的分析與設計;接著介紹了激光測距系統的外圍電路和基於quartusii集成軟體平臺的部分硬體電路的設計，並對其中的設計進行了模擬和驗證;最後總結提出了對系統今後的進一步改進和完善的思路。
  7. The ecm includes a standoff jammer ( soj ) broadcasting wideband noise and targets attempting range gate pull off ( rgpo )

    Ecm場景包括一個遠距離支援干擾機（ soj ）和目標距離波門拖引（ rgpo ） 。
  8. The goal of this subject is to sum up and exploit our technique how to produce low phase noise wideband vcos, through investigating and studying the basic theory and recent research fruits, combining national condition, and produce our low phase noise wideband vcos. using high q components, such as : coaxial resonator, dielectric resonator, makes bandwidth of vco become narrower, so that recently common wideband vcos generally make inductor and capacitor ( lc ) as resonators, combining varactors with wide range tunable capacitance, and achieve the wideband

    本課題旨在通過對低相噪寬帶vco的基本原理、國內外在這方面的進展，結合國內的實際情況進行研究，總結和開發出自己的方法，形成自己的理論。並把它運用於實踐，以製造出低相噪的寬帶vco 。由於加入高q元件，如：同軸諧振器、介質諧振器等，會導致振蕩器帶寬比較窄，目前的寬帶vco一般採用電感電容（ lc ）作為諧振元件，輔之以大變容範圍的變容二極體，達到寬帶的目的。
  9. Abstract : a noise model for the analog correlator used in the ultra wideband receivers is proposed due to lack of simulation capability on noise performance of the correlator in current eda tools. the analog correlator circuit is divided into several parts to calculate the equivalent noise sources respectively. the ideal impulse generators, instead of the noise sources, are then applied to obtain the time varying transfer functions. fourier transforms are carried out to explore the relationship between the noise input and output in frequency domain for each part. then the symmetrical noise sources are grouped together and the periodicity of the circuit is utilized to further simplify the model. this model can be used to evaluate noise performance of the correlator

    文摘:給出了分析模擬相關器的噪聲模型.將相關器分成不同的幾個子模塊后，對各模塊分別計算等效噪聲源.然後用理想脈沖源代替噪聲源計算電路的時變傳輸函數，接著用傅里葉變換計算輸入輸出的頻域關系.利用電路的對稱結構合併對稱的子模塊可以進一步簡化模型.該模型可以用來估計相關器的噪聲性能
  10. For wideband noise interferences, this dissertation studies wavelet packet threshold method and uses it to suppress wideband noise interferences in signal domain and image domain

    對于寬帶噪聲干擾，本文研究了小波包閾值方法，並將之應用到信號域和圖像域來抑制寬帶噪聲干擾。
  11. The paper was based on the goal of low phase noise, high resolution to study and analyze the wideband frequency source

    本文正是基於低相位噪聲、高解析度為目的，對寬帶頻率源作了研究和分析。
  12. Simplified klt and wavelet transform based approach for enhancing speech degraded by non - stationary wideband noise

    和小波變換的非平穩寬帶噪聲語音增強
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