通頻帶寬度 的英文怎麼說

中文拼音 [tōngbīndàikuān]
通頻帶寬度 英文
pass-band width
  • : 通量詞(用於動作)
  • : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  1. 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,資源緊張,音傳輸有限且復雜多變,而各種音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。
  2. Intermodulation suppression for fh ( frequency hopping ) receiver is designed by selecting the intermediate frequencies and changing group of filters, local oscillation ( lo ) frequency, bandwidth of lo frequency under the condition that receiver configuration, sensitivity, dynamic range, instantaneous bandwidth and precision of frequency measurement are fixed

    摘要針對跳接收機的體制和靈敏、動態范圍、瞬時工作、測等設計參數,過改變預選器組成、本振率和本振,分析接收道的中選取原則,以實現跳接收機的互調抑制設計。
  3. The factors limiting the frequency band of the wide - band amplifier are introduced. through analyzing the effects of the intrinsic parameters and parasitical on the frequency characteristics, a method of improving fr of mosfet by using short channel device and making mosfet work at the saturation region through raising vgs is put forward ; the effects of different kinds of circuit configurations on the frequency characteristics and the junction voltage on the voltage pattern circuit, current pattern circuit and frequency characteristics are analyzed. according to the linear theory of transconductance which is applied in the bit circuit, the current pattern amplifier circuit, current transfer circuit and output circuit which consist of mosfet and the wide - band amplifier composed of them are put forward

    介紹了限制放大器的因素,過分析mosfet的本徵參數、寄生參數對率特性的影響,提出了採用短溝器件、使mosfet工作在飽和區、抬高柵源電壓等提高mosfet特徵率的方法;分析了不同電路組態對放大器率特性的影響、節點電壓對電壓模電路、電流模電路率特性的不同影響,根據應用於雙極晶體管電路的跨導線性原理,提出了採用mosfet構成的電流模放大電路、電流傳輸電路、輸出電路以及由它們所組成的放大器,獲得了良好的率響應。
  4. Isar transmits wide bandwidth signals to obtain high range resolution. the cross - range resolution is obtained by the doppler frequency information of the target ’ s rotation

    逆合成孔徑雷達過發射大信號獲得好的距離解析,利用目標相對于雷達的轉動產生多普勒率梯來獲取好的方位向分辨力。
  5. Combined with researches on propagation characteristics, the micro - current sensor for on - line pd monitoring is developed and the effects of coil number, stray capacitance and loading resistance on pass - band and sensitivity are also studied

    同時,結合傳播特性,研究了局部放電在線監測微電流傳感器,並就線圈匝數、雜散電容和負載電阻等對傳感器、靈敏等性能參數的影響進行了分析。
  6. Finally according to the above mentioned results, two universal ulpa were made and their performance were tested. these results indicated that on the whole, the values of parameters, such as sensitivity of each element, center frequency, relative bandwidth and cross coupling among near elements and so on, and their consistency all meet the ask of technique. therefore, both of transducers performance are favorable

    最後根據上述研討結果,製作了兩個用超產相控線陣換能器,並進行了性能測試,結果表明兩個換能器各陣元靈敏、中心率、相對、相鄰陣元間串波等參數值及其一致性均基本滿足技術要求,換能器性能良好。
  7. The results showed conversion loss less than 11. 2db and image rejection ratio more than 20db over 4ghz rf bandwidth, when if is 70 mhz fixed

    過測試,當中固定在70mhz ,在射大於4ghz內,變損耗小於11 . 2db ,鏡抑制大於20db 。
  8. The amplitude and phase balance of the unit mixer is controlled strictly through designing. wideband image rejection is realized in the condition of the fixed if

    過設計控制單元混器幅和相位平衡,在固定低中下,實現了抑制。
  9. The paper first reviews the research background and actuality of the filter " s design in china and other country, introduces the meaning of the project and the work of the paper, narrates the theory of the switched - capacitor network and the basic switch building blocks, analyses the related factors of the design of sc filter. such as the selection of the architecture, the trade off of the opamp " s gain, bandwidth, phase margin, slew rate and setting time, the effect of the switch " s on resistor, how to reduce the charge injection and the clock feed - through, the power consumption and the selection of the sampling frequency and so on

    本文首先回顧了濾波器設計的國內外研究背景和現狀,介紹了本課題提出的意義以及本文的主要工作,論述了開關電容網路原理和基本開關模塊,分析了開關電容濾波器設計的相關因素:電路結構的選擇,對運算放大器設計中高增益、、相位裕、轉換斜率和建立時間等的折中考慮,開關的打開電阻對電路的影響,開關電容電路中怎樣減少電荷注入和時鐘饋,以及整個電路的功耗問題和采樣率的選擇等。
  10. Based on the dds technology, the waveform generator first stored data in high speed ram, then used dac to synthesize waveform by the data. many waveforms could then be generated easily. besides, the wave generator could get high performance on frequence resolution and stability, phase continuum, relative bandwidth etc. the dds technology was widely used in frequence synthesis field

    基於dds技術的波形發生器以高速存儲器作為波形數據查找表、過高速d / a轉換器對存儲器的波形進行合成,可以靈活產生多種波形,同時具有率解析高、率穩定性好、率轉換快、相位連續性好以及相對等特點。
  11. By using optical cable communication methods, which have advantages of great information transmission capacity, rapid velocity, wide frequency band, strong anti - jamming capability, low circuitry loss and easy construction, modern sky - wave over - the - horizontal radar can achieve information transmission and system control of full coherent radar, which has excellent abilities of security, stabilization, anti - jamming and anti - destruction

    過採用光纖傳輸技術,利用其信息傳輸容量大,速快,,抗干擾能力強,線路損耗低,易於施工等特點,實現全相參雷達的信息傳輸和系統控制,具有優良的保密性,穩定性、抗干擾性和抗摧毀能力。
  12. The spot responder system which is the necessary part of ctcs is analyzed in the dissertation and three key technologies of the channel in the responder system are researched. firstly, a new kind of rectangular plate magnetic inductive loop antenna is designed to transmit the power frequency. researching the near field inter - inductive characters, the relationship among the inductive efficiency, the perimeter and the conductor width of the antenna is found out

    本文在對ctcs中的點式應答器系統原理及組成進行分析和消化的基礎上,對系統中道的幾個關鍵技術進行了詳盡的研究,主要分為三個方面: 1 ,提出並研製了新型的片式環形磁感應天線,並對傳輸能量載波的天線的近場互感特性進行了分析,得到互感效率隨天線的周長大小以及導的變化規律,並過計算機模擬和試驗對天線的近場波瓣圖進行了研究;過分析匹配技術中的實法理論,設計了信號載波天線的匹配網路。
  13. Secondly, ground on the duct noise control, the delayed - lms algorithm, which is actulized easily, is brought forward, then the simulation on pc is achieved. it is shown from the computer simulation that for the single frequency noise, there will be a good effect when choosing the suitable parameters ; but for the narrowband noise, the effect will become worse with increasement of the bandwidth. this result is helpful to analyze the parameters influencing anc

    結果表明: ( 1 )隨著濾波器長的增大,系統收斂速變快; ( 2 )隨著值的增大,系統的收斂速增大,但是當值超過某一范圍時會引起系統的發散; ( 3 )次級路的延遲數與初級噪聲率有關; ( 4 )對于窄信號, dlms演算法可以取得一定的降噪量,但是隨著窄信號的增大,降噪效果明顯變差。
  14. Because gyrotron traveling wave tube amplifier ( gyro - twt ) is an important millimeter wave amplifier with the characteristics of the high output power, the broadband width, and good efficiency, which has vast application vistas in many areas such as millimeter radar, communications, electronic countermeasure, and so forth, it has been pay much respect in the world

    迴旋行波管是一種大功率、高效率、放大器,在毫米波雷達,信與電子戰等方面有十分重要的應用前景,因而在國際上受到高重視。由俄羅斯人g . denisov等提出的螺旋波紋波導是一種比較理想的結構。
  15. Specialties : the range of center frequency it can achieve is bigger than one - piece filter ; at the time it has the features of wide pass - band, low insertion loss and high restraint outside the band

    特點:可實現的中心率范圍較單片濾波器范圍大,插入損耗小,外抑制高。
  16. Using a general approach for designing two - dimensional photonic crystals of square lattice, we have found many structures whose absolute band gap hi the low or high frequency range is much larger than what has been reported in the previous literature. to speed up the computation, a fast plane - wave expansion method is introduced for calculating the band structures for such special photonic crystals

    最後以gaas和te材料為基礎,過像素分析法,從理論上提出了多種在低、高區域有大絕對禁的二維光子晶體,並且其禁顯著優于所有已有文獻報道的光子晶體結構。
  17. Compared with analog oscilloscope, digital storage oscilloscope contains excellent trigger function, measure function and various data collection methods. it could save and copy the wave data by connecting with pc, printer, and the like. the bandwidth, distinguishability, and sensitivity of digital storage oscilloscope are all better than analog oscilloscope

    和模擬示波器相比,數字示波器有著超強的觸發功能和測量功能以及多樣化的採集方式和自動量程,可以存儲波形並進行硬拷貝,過介面與pc機、印表機等數字設備相連,其、解析和靈敏比模擬示波器更好。
  18. The relationship between the body dynamic frequency bandwidth and the precision of the dynamic surveying with incomplete inertial sensors is clarified which can be a guideline for practical inertial system designs

    域分析,闡明了載體姿態運動與動態測量精的關系,對實際工程中慣性系統設計具有重要的指導作用。
  19. The vertical delay stacked source obtains optimum matching with wall rock by controlling the charge mode and the excitation velocity, and maximum utilizes its energy. thus the seismic signal with the high frequency abundance and frequency bandwidth wide be obtained

    垂直延遲迭加震源過控制裝藥方式和控制炸藥速來達到與圍巖的最佳匹配,最大限的利用其激發的能量,激發出高成份豐富、、高能量高的地震信號。
  20. This task uses the ds - ss technology, and researchs the important technologies, such as synchronization of ds - ss, rake receive, narrow - band interference suppression, etc. these technology are useful for the voice - band channel of hf. i designed one system of very low bit rate for hf data communication, and completed the softwave module design of the system. i get the result of system ' s simulator, it ' s useful for the system realization

    根據短波音道的特點,重點對系統的擴同步技術、 rake接收技術和窄抗干擾技術進行了專題的研究。並根據自己多年的科研經驗,設計了一種具有實際意義的短波最低限信系統,並對實際的軟體實現進行了模塊化的設計。
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