隨機調制載波 的英文怎麼說

中文拼音 [suídiàozhìzǎi]
隨機調制載波 英文
randomly-modulated carrier
  • : Ⅰ動詞1 (跟; 跟隨) follow 2 (順從) comply with; adapt to 3 (任憑; 由著) let (sb do as he li...
  • : machineengine
  • 調 : Ⅰ動詞1 (配合得均勻合適) harmonize; suit well; fit in perfectly 2 (使配合得均勻合適) mix; adju...
  • : Ⅰ動詞1 (製造) make; manufacture 2 (擬訂; 規定) draw up; establish 3 (用強力約束; 限定; 管束...
  • : 載Ⅰ名詞(年) year : 一年半載 six to twelve months; six months to a year; 三年五載 three to five ...
  • : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
  • 隨機 : random stochasticrandom
  • 載波 : signal carrier; carrier wave; carrier: 3路載波 three channel carrier載波傳輸 carrier transmission...
  1. However, the efficiency of pwm at light load is low and the filter design of pfm is rather difficult due to the random characteristic of the frequency spectrum distribution

    採用相應調方式的ic品種繁多,各有千秋。但pwm在輕時效率較低,而pfm由於頻譜分佈,不利於后續濾器的設計。
  2. This waveform library not only contains those typical radar signals like single - carrier frequency signal, encoded signal, lfm etc, but also include many hybrid modulated signals, like fsk / psk signal, fsk / ppm signal, psk / ppm signal, pseudo - random fsk / psk signal, etc. we use visual c + + 6. 0 to implement this software program, this makes it easy in control operation and provides a nice human - machine interactive interface

    形庫中既包含了傳統的雷達形,如單頻脈沖信號、 lfm 、編碼信號等,又包括了復合調形,如fsk / psk信號、 fsk / ppm信號、 psk / ppm信號、偽fsk / psk信號等。採用vc編程實現,使其具有友好的人界面和靈活的控操作。
  3. This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits

    本文採用了一種基於fpga的通用數字調調方案,該方案在調端採用了正交平衡調技術,在解調端採用了中頻帶通采樣、數字匹配濾、延時差分解調等技術,直接在中頻上進行數字信號處理,不需要進行下變頻,也不需要增加額外的偽碼同步捕獲和提取電路。
  4. Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency

    Ds信號是經過高速偽序列和正弦二次調的寬帶信號,因此具有周期平穩特性,它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了頻和偽碼速率信息特徵,在譜頻率等於頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍頻截面切片上包含了初相信息特徵。
  5. In the view of stochastic resonance ( sr ) and signal processing, parameter - turning sr ( psr ) theory and method is proposed and the characteristics of bistable systems are studied. the applications of psr in multi - frequency analog signal processing, digital baseband pulse - amplitude modulation signal transmission and digital carrier modulation signal transmission are investigated. this thesis has also introduced the concepts of parameter - adaptive sr and array - induced sr

    本文主要從共振物理力學理與信號處理的角度,研究了非線性雙穩態系統的數字特徵,提出了參數調共振( psr )理論和方法,並將這一理論應用到多頻模擬信號處理、數字基帶信號傳輸和數字調信號傳輸中,引入了參數自適應共振和陣列共振系統的概念。
  6. The mainlobe - sidelobe characters of the pn codes are also discussed when modulated by the signals and carrier - doppler exsists in chapter 3

    本文第三章分析了存在多普勒、有符號調時的周期偽序列的主旁瓣特性。
  7. Take the hoc based blind modulation detection algorithm as an example, the relationship between the blind modulation detection algorithm and synchronization is investigated. an unproved detection algorithm robust to frequency offset is proposed which solves the problem caused by the error in carrier synchronization. how to synchronize a received signal with unknown modulation type is studied and a blind algorithm to estimate symbol timing of the signals with unknown modulation type is presented

    研究了同步和碼元定時同步與調方式盲檢測演算法的關系;以自適應單中高階累積量調方式盲檢測演算法為例,對于同步誤差引起的頻偏問題,提出一種基於頻偏穩健的mdpsk信號調方式盲檢測演算法;對于未知調方式信號的定時同步問題,提出一種盲定時估計演算法,該演算法可以估計mdpsk和mqam信號的定時同步信息,實現數字信號的同步分類;提出了一種基於調方式盲檢測的自適應接收結構,把調方式盲檢測,信噪比估計和同步解調聯合起來進行,實現調方式通道質量而自適應變化的信號的正確接收。
  8. The adaptive sr, studied in this thesis, means that the system automatically selecting parameter with a recursive algorithm, not adaptively adding noise. a parallel connection sr system is introduced and its application in digital frequency shift modulation signal transmission is discussed

    我們初步提出了參數自適應共振的思想以及收斂演算法,同時,我們還研究了數字信號調傳輸中的並聯共振系統。
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