高頻率信號 的英文怎麼說
中文拼音 [gāobīnlǜxìnháo]
高頻率信號
英文
radio-frequency signal-
Due to existing signal processing technology ’ s shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high - precise signal processing technology : firstly, to get power spectrum with hanning windowed welch modified periodogram, search its peak value frequency ; secondly, to apply zooming analysis via goertzel algorithm ; at last, to get a highly precise doppler frequency with energy centrobaric rectifying algorithm 。 the simulating result indicated that this technology introduced could get accurate doppler frequency 。 depending on above discussed technology, we designed a signal processing scheme, and developed a signal processing system. the running result showed high performance, verified the feasibility and reliability of the highly precise signal processing technology introduced. in a word, the technology improved ldv ’ s performance such as measurement precision, measurement range, dynamic response time 。 and it will have a wide application foreground
針對存在的缺點，本文提出了一種應用於激光多普勒測速的高精度信號處理技術，即首先利用加hanning窗的welch修正周期圖演算法得到信號功率譜，搜索其譜峰值頻率，接著利用goertzel頻譜細化演算法對搜索的譜峰進行細化分析，再引入能量重心頻譜校正演算法對細化后的譜峰進行校正分析，從而將離散頻譜分析演算法、頻譜細化演算法和頻譜校正演算法三者有機結合起來，充分發揮各自的優點:通過加hanning窗的welch修正周期圖演算法快速得到功率譜及峰值頻率，通過goertzel演算法獲得分析頻帶的高解析度頻譜，然後通過能量重心校正演算法對細化后的頻譜進行高精度校正，這樣不僅保證了演算法的高效性，而且大大提高了分析的精度。The cumulation of tdfcsd in a certain period eliminates the remainder noise more, and the ability of detecting signal ' s frequency is improved
通過對某段時間得到的功率譜密度累積，進一步改善snr ，提高信號頻率的檢測能力。Whatever it is radar, eccm equipment, communication equipment or instrument, frequency source with high stability is needed to guarantee the quality of carrier signal
無論是雷達、電子對抗，還是通信、儀器設備等都需要高穩定度的頻率源，以保證載波信號的質量。The brief name ring, measures a device right high, inside, low and each segment scope for ability for even emersion of signal, pointing lowestly validity returning putting the frequency with tallestly validity returning put of the frequencying. request towards device rang contain both side, on is a scoping as far as possible breadth, can be namely frequency bottom that replay the is as far as possible low, and the upper limit is as far as possible high ; two is a frequency scope the inside is at all point to respond to as far as possible flat, avoided to appeared the big motion
簡稱頻響，衡量一件器材對高中低各頻段信號均勻再現的能力，指最低有效回放頻率與最高有效回放頻率之間的范圍。對器材頻響的要求有兩方面，一是范圍盡量寬，即能夠重播的頻率下限盡量低，上限盡量高二是頻率范圍內各點的響應盡量平坦，避免出現過大的波動。In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab
針對無連接和面向連接的各種復雜網路環境下，通信頻帶資源緊張，音頻傳輸帶寬有限且復雜多變，而各種音頻數據又日益增多的局面，本文研究小波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義，在前人不斷工作的基礎上，提出了一種優化小波包變換編碼方案用於音頻數據的壓縮演算法，兼考慮了編碼效率、多碼率和壓縮時延多個方面，並在matlab環境下做了模擬實驗，對各種音頻信號及多種小波函數做了模擬結果比較，實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮效果，達到多碼率下實現實時編解碼的過程，在高速dsp晶元等硬體設備支持下，可以有效應用於實際復雜多變信源編碼。The experiment apparatus has been developed, which is based on software ( labview ) and hardware ( pci board ni 6024e ). the displacements and generative force at the tip of the ipmc actuators were measured with respect to the different voltages, frequents and various waveforms which include square, sinusoidal, and triangular wave
實驗選取了不同電壓幅值，不同頻率的方波、三角波、正弦波三種波形作為電激勵信號，利用高速攝像記錄ipmc的位移變形，並通過力傳感器實測了ipmc試樣末端的輸出力。In this thesis a high precision frequency ( range ) estimation technique based on the phase of the fft of the beat - note signal is presented. the phase of the fft of the beat - note signal changes with the range between the radar and the liquid surface
差拍信號的fft幅度最大處的相位隨距離變化，因此可以利用fft相位在一個頻率（距離）分辨單元范圍內估計差拍信號的頻率（距離）的位置，從而提高頻率（距離）估計精度。This paper presents a method of improving on frame & horizontal synchronization in laser phototypesetter, by using singal - chip computer system to detect real - time frequency deviation and adjust film transmission speed
摘要提出了一種在激光照排機電控系統中，利用單晶片微機對轉鏡掃描光柵頻率信號的暫態波動量進行檢測、提取，並以此實時校正系統輸片速度，實現場掃描對行掃描的跟蹤、補償，從而提高行、場掃描同步精度的方案。By applying dwt and mallat in wavelet analysis, the oscillation signal of active power on transmission line is decomposed and reconstructed ; the strategy of upfc ' s secondary control based on wavelet is proposed by using the reconstructed active power as input signal. simulation results verify the efficiency of damping subsequent swing quickly under serious power oscillation circumstance that is hard to damp by ordinary upfc controller. the system dynamic stability is apparently enhanced
針對系統功率波動頻率較高情況下upfc對系統后續擺穩定的控製作用難以得到充分發揮的情況，採用小波分析的mallat塔式演算法對系統功率波動信號進行分解，並基於mallat塔式重構演算法的思想濾除了信號的冗餘擾動成份，尋找到一個高壓縮比、低相對誤差的重構功率信號，從而使其能夠符合upfc實際控制需要。But modern electronic counterwork technic could exactly estimate the carrier frequency, signal period, even the pseudo - random ( pn ) sequence itself of direct sequence spread spectrum ( dsss ). it is urgency to investigate a new dsss to achieve lower probability of detection ( lpd ) and higher anti - jamming
然而現代電子對抗技術可以準確估計直接序列擴頻通信的載波頻率、符號周期甚至擴頻碼本身，為達到更低截獲率和更高抗干擾的通信目的，必須研究新的直擴通信技術。The cpld can offer its particular functions. for example, reducing the number of components and devices, making the layout board convenience and simple, decreasing the device ' s volume. it is propitious to make portable oscilloscope
選用一般的a / d轉換器和up控制器即能實現對高頻率的重復信號進行測量，大大降低了成本和外圍電路復雜程度和設備體積，有利於製作便攜式示波器。In the time - domain, based on the principle of random sampling of dso. two way ( " time amplifing in dual slope integral " and " time - voltage convert " ) are implemented to measure the time between the system triger and writing clock. thus random sampling interpolate can be done to measure repeated signal in high frequency with the a / d convert and controller which frequency are lower
在時域，根據數字示波器隨機取樣原理，用兩種方法（雙斜率積分時間放大測量方法和時間? ?電壓轉換測量方法）測量數字示波器系統觸發和采樣寫時鐘間時間間隔，用低速a / d轉換器及控制器進行模?數轉換和控制，以此進行隨機取樣內插，從而實現了對高頻率重復信號的測量。These requirements are too hard to reached by using normal analog circuit. frequency synthesizer is the key technology to produce a great deal of frequency signal
這些技術要求用普通的模擬電路技術是達不到的，頻率合成技術是產生大量高精度頻率信號的主要技術。It is very difficult to design a high - quality underwater acoustic data transmission system. in our study, we use frequency diversity and frequency - hopped technology. this method is an effective solution for the isi and signal fading
該方法起到保證mfsk傳輸系統使用頻率中文摘要統使雨頻率分集技術能得以有效的實現；並可用於提高mfsk信號檢測精度，因此在頻率信號檢測中它有廣泛應用意義，它是本文重要創新之處。An effect that occurs when a signal is sampled at a rate less than twice the highest frequency present in the signal. the subsequent signal recovered from the samples will not contain the high frequency component of the original signal and will display a false low frequency signal
以低於信號中最高頻率兩倍的頻率進行信號取樣時出現的一種效應，即當由取樣狀態還原時，還原后的信號將不再含有原來信號中的高頻成分，並將顯示出虛假的低頻信號。This invention relates to a hearing system for human beings in which high frequency electromagnetic energy is projected through the air to the head of a human being and the electromagnetic energy is modulated to create signal that can be discerned by the human being regardless of the hearing ability of the person
此發明是一個針對人的聽覺系統?高頻率電磁波從空中輸送到人的腦內?此電磁波攜帶聲音信號?聲音作用不會被接收的人聽力限制（涵意?聾子也聽得到） 。Because the sonar system have high frequency, high resolving capability and 128 receiving channels, the unit can not only sampling, store and translate the receiving sound - signals, but also have the property of lower power
由於聲納系統工作在高頻率，並且具有高解析度和128個接收通道，所以水下單元的設計不僅能夠對接收聲信號進行高速採集、存儲和傳輸，而且還具有低功耗， 。A method to measure the frequency of high frequency electrical - signal through pld
器件實現高頻電信號頻率的測量Avalanche diode high order frequency multipliers are able to transform microwave signals to millimeter wave signals in single stage by fierce nonlinear inductance effect in avalanche phenomena. it has obvious advantages in high order frequency multiply with high efficiency and is a good approach to provide high quality millimeter wave source
雪崩高次倍頻器能夠將微波信號單級高次倍頻至毫米波頻段，它倍頻效率高、輸出功率較大，具有高頻率穩定度和低相位噪聲的特點，能夠為毫米波應用提供優質的毫米波信號源。Firstly, this paper introduces the basic theory and the key technology of digital intermediate frequency system, secondly the method of the sampling rate conversion, multirate signal, and which is the important, essential theory in digital intermediate frequency system, is studied carefully. then it analyses the components of the flow chat. finally we simulated the designed system on spw and the properties of the system is make out
文章首先闡述了數字中頻系統的基本思想、關鍵技術和發展概況，然後研究了數字中頻系統涉及的數字信號處理理論，主要內容包括欠采樣技術、多速率信號處理、正交變換理論與高效數字濾波技術，然後詳細分析了數字中頻系統的設計，並在spw模擬平臺上加以實現，最後根據模擬結果分析了數字中頻系統的性能。分享友人