instantaneous bandwidth 中文意思是什麼

instantaneous bandwidth 解釋
射頻包絡
  • instantaneous : adj 即刻的，瞬間的。 an instantaneous bomb 瞬發炸彈。 instantaneous death 即刻死去。 an instantan...
  • bandwidth : （帶寬）：電纜，鏈路或系統傳輸數據的能力。
  1. 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

    摘要針對跳頻接收機的體制和靈敏度、動態范圍、瞬時工作帶寬、測頻精度等設計參數，通過改變預選器組成、本振頻率和本振帶寬，分析接收通道的中頻選取原則，以實現跳頻接收機的互調抑制設計。
  2. The system has 6. 8mhz digitalizing bandwidth and 70db instantaneous dynamic range, which can be obtained by using rf / if converter vxi3570, high precision digitalizer e1437a and proper signal processing arithmetic

    系統數字化帶寬設計為6 . 8mhz ，選用rf if變換模塊vx13570 、高精度數字化儀e1437a和適當的信號處理演算法可獲得70db以上的瞬時動態范圍。
  3. The control tactics of space voltage vector are investigated, and the simplified algorithm which judges the sector location of reference vector and calculates switch operation time is put forward. by analyzing the current hysteresis control, the relation between switch frequency, and hysteresis bandwidth and input inductance of pwm rectifier is deduced. by applying instantaneous power theory, the principle of pwm rectifier power control is analyzed, and the direct power control by matlab toolbox through estimating active power and reactive power with virtual flux is realized, and the simulation results prove that it is correct

    對常用空間電壓矢量控制策略進行分析，提出了給定參考矢量所在區間判斷的簡化方法，以及電壓矢量作用時間的求取方法；分析了電流滯環控制策略，推導出開關頻率與滯環帶寬以及整流器輸入電感之間的關系；應用瞬時功率理論分析pwm整流器功率控制原理，通過虛擬磁鏈估計有功功率和無功功率，用matlab實現了直接功率控制，並驗證了該控制方法的正確性。
  4. According to transcendent knowledge, this algorithm classifies modulation systems by computing instantaneous frequency and instantaneous bandwidth of signal and regarding them as modulation parameters

    該演算法憑借先驗知識，通過計算信號的瞬時頻率和瞬時帶寬，並以此作為制式識別參數來判斷信號的調制類型。
  5. However, the instantaneous bandwidth of signals is restricted for general phased array because of its transition time and aperture effect

    但是，基於移相器的普通相控陣天線在進行寬帶寬角掃描時，由於渡越時間和孔徑效應的影響，使信號的瞬時帶寬受限。
  6. On the other hand, in order to distinguish and identify the targets, and to solve the problems of radar imaging, phased array radar must have also wide instantaneous signal bandwidth

    另外，為了提高天線的分辨、識別能力和對多目標成像的能力，相控陣雷達還必須具有大的瞬時信號帶寬。
  7. Due to restriction with the array aperture transition time, traditional phased array radar works under relative narrow signal bandwidth, so this restricts the application of phased array radar in the field where high performance is demanded. however, optically controlled phased array radar ( ocpar ) adopts the photoelectron technology, counteracts the aperture transition time via the method of optical true time delay ( ottd ), so it can realize wide instantaneous bandwidth and squint - free operation ; meanwhile, it can realize the miniaturization of phased array radar and has super anti - electromagnetism interference capability

    而光控相控陣雷達採用光電子技術，通過光實時延遲的方法來抵消孔徑渡越時間，可以實現相控陣雷達的寬帶寬角掃描;同時也可以使得相控陣雷達小型化，並具有強的抗電磁干擾的能力;另外，由於光纖傳輸具有損耗低、頻帶寬等固有優點，採用光纖連接雷達天線和雷達控制中心，可以使兩者的距離較採用同軸電纜有較大的提高，更有利於保護雷達控制中心。
  8. Rising computer power has recently enabled wireless devices operating in these upper bands to offer gigabits per second of instantaneous bandwidth within very small areas, or “ picocells, ” of coverage

    電腦運算效能提高，也讓無線裝置可在這些較高的頻帶運作，在非常小的區域（即所謂的微微細胞）內，提供每秒數十億位元的短時間頻寬。
  9. In this dissertation, the mathematic model of optically controlled phased linearity array is established by basic theory of phased array radar. the problems of instantaneous bandwidth of ocpar and subarray number are researched, the relationship between the excursion of the direction pattern and subarray number, main lobe stretched - out of the direction pattern and bandwidth, side - lobe level of the direction pattern and subarray number, pulse compression and bandwidth, pulse compression and subarray number is analyzed. after corresponding simulations are done, a summary of advantages of ocpar compared with the traditional phased array radar is presented

    針對x波段信號，仔細研究了光控相控陣的瞬時帶寬問題和子陣數問題，分析了光控相控陣列方向圖偏移與信號帶寬及子陣數的關系，光控相控陣列方向圖主瓣展寬與帶寬的關系，方向圖旁瓣電平與子陣數的關系，脈沖壓縮與信號帶寬及子陣數的關系，完成了相應的模擬，通過與普通相控陣的對比，總結出了光控相控陣相對于傳統相控陣的巨大優勢。
  10. For radar is a complicated electronic system, the implementation of uwb will be subject to the level of electronic hardware. the large instantaneous bandwidth of uwb return causes great trouble to receiver

    由於雷達是綜合性很強的電子系統，超寬帶雷達的具體實現要受到實際硬體水平的限制，其中視頻回波信號瞬時大帶寬給接收機數據採集造成了很大的困難。
  11. The system can shape video stream with data partitioning technology and tune rate of shaping according to network instantaneous bandwidth adaptively

    該系統採用數據劃分技術實現碼率整形，並且能夠根據網路瞬時帶寬動態地調整整形碼率。
  12. The dissertation is focused on uwb waveforms, which achieve uwb return without increasing the instantaneous bandwidth, and signal processing to generating sar images with the desired waveform

    本論文基於當前的硬體水平限制，研究在不增加接收機瞬時帶寬的情況下獲得超寬帶回波的信號形式，探討超寬帶波形在合成孔徑雷達成像中的應用。
  13. Ieee electronics communication engineering journal, 1996, 8 : 156 - 164. 20 shiomoto k, chaki s, yamanaka n. a simple bandwidth management strategy based on measurements of instantaneous virtual path utilization in atm networks. ieee acm trans

    在模擬的結果中，我們可以發現使用fc - rwa確實更能掌握網路的狀態以判斷建立連結與否，並將可以避免浪費網路的資源以達到較好的傳輸品質。
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