shift code 中文意思是什麼

shift code 解釋
移位碼
  • shift : vt 1 變動;改變;搬移;移動;轉移;變換;替換;更換。2 推卸;轉嫁。3 消除;撤除。4 【語言學】變換...
  • code : n 1 法典;法規。2 規則,準則;(社會、階級等的)慣例,習俗,制度。3 (電)碼,代碼,密碼,暗碼;...
  1. Bcfsk binary code frequency shift keying

    二進制編碼頻率移位鍵控法
  2. By complementing the proposed scheme with methods to estimate the fractional code delay, the acquisition unit an provide high quality delay estimates such that it can instead of the delay locked loop in the traditional ds receiver. after dispreading successfully, this dissertation introduces a method to estimate the doppler - shift directly from some samples based maximum likelihood estimation, and then revise it forwardly

    在成功解擴之後,本文利用最大似然估計從l個樣點中直接估計出殘余多普勒頻偏,並進行前向頻偏校正,來代替傳統擴頻接收機中的科斯塔斯環,經模擬證明該方法的估計精度完全滿足解調的要求。
  3. At first we improve the methods of iris image preprocessing, including an efficient arithmetic of evaluation iris images, an improving method of locating iris, calibrating iris image by the translation of coordinate and the circular shift of code, a eatimate of the background illumination by bicubic spline, and the image enhancement by the dual tree complex wavelet transform. next we designed the recognition arithmetic based on the location of the local maxima of the wavelet transform modulus. in the thesis lots of simulation are performed by means of matlab and visual c + +

    首先改進了虹膜預處理方法,實現了一種快速高效的虹膜質量評價演算法;設計了一種改進的兩步虹膜定位演算法,準確的定位了虹膜的內外邊界;利用坐標轉換和編碼的循環移位實現了對虹膜圖像的配準;利用雙三次樣條函數擬合虹膜圖像背景,去除了非均勻光照對虹膜識別的影響;使用二分樹復數小波方法增強了虹膜圖像的對比度;在識別演算法方面,本文設計了一種「基於小波模極值點位置的虹膜識別演算法」 。
  4. To combine a key with shift, precede the key code with

    若要將一個鍵與shift組合,請在該鍵代碼之前加上
  5. Through utilizing the shift multiplication characteristics of m series, this kind of radar system eliminates the bad effect of doppler frequency. in theory, the doppler tolerance of the radar system can reach the half of the code rate with proposed echo pretreatment method in this paper

    從理論上說,應用於該雷達系統的信號處理方法可以使得雷達系統的多普勒容限達到偽碼子碼重復頻率的一半,從而使偽碼調相雷達可以有效地發現高速目標。
  6. We propose an algorithm, which integrate the shift invariance of redundant discrete wavelet transformation ( rdwt ) and the flexibility of multi - resolution motion estimation, to overcome the shift variance of dwt and get the precise motion vector. under the different code parameter, we take the proposed algorithm compared to several present algorithms, and experiment results have shown that proposed algorithm could leave less energy in the residual frames, get more precise motion vector and better reconstructed frames

    文章最後在不同的編碼參數下,將所提演算法與兩種傳統小波域運動估計演算法作比較,根據實驗所得數據分析,發現所提演算法在性能上要優于另外幾種演算法,具體體現在運動估計后所得殘差幀能量更小,重構幀客觀與主觀質量更高。
  7. There are two uncertain factor about it : the phase of the pn code and the doppler - shift. after capturing the received signal successfully, the traditional ds receiver always uses a delay locked loop ( dll ) to synchronize the pn code and then uses a costas loop to realize the carrier synchronization. this complex closed - loop structure not only take long time to realize the synchronization, but also has the defect of “ hang up ”

    傳統的擴頻接收機通常在捕獲偽碼信號后利用遲早門鑒相的延時鎖定環來實現偽碼的精同步,解擴后利用科斯塔斯環實現載波同步,這種閉環結構不僅同步時間長、結構復雜,而且鎖相環還存在所謂的「 hang - up 」現象。
  8. Secondly, we prove the self - relation function and correlation function of pseudo noise code sequence and obtain the shift register generating circuit from it ' s generating function

    然後,通過偽碼的生成多項式,導出偽碼的移位寄存器生成電路,並分析了偽碼的自相關特性和互相關特性。
  9. In this paper, bit - error rate performance analyses are presented for coded and un - coded frequency hopping m - ary frequency - shift keyed systems under the condition of additive white gaussian noise ( awgn ) and partial band noise jamming and multitone jamming. the use of error - correct codes provide a way to improve the performance of frequency hopping system, particularly the use of reed - solomon code in a fh system under the condition of partial band noise jamming can greatly improve the performance of system. so we provide the way of coding and decoding of rs code in c language. in the end, we offer the simulation of the performance of time diversity fh / 2fsk system over partial band jamming noise channels

    第一章為緒論,敘述跳頻通信的發展趨勢,以及基本概念,第二章及第三章介紹提高抗部分頻帶干擾的前向糾錯碼reed - solomon碼的原理和實現方法。第四章研究跳頻通信系統在各種干擾條件下的性能。最後在第五章以fh mfsk系統為例,探討在部分頻帶干擾下的系統性能,並進行計算機模擬,模擬結果表明採用分集技術和各種編碼技術對于系統的性能改善具有明顯的效果。
  10. A code extension character that can is used by itself to cause a return to the character set in effect prior to the departure caused by a shift out character, usually to return to the standard character set

    一種代碼擴充字元,其作用是返回原字符集,即返回到在移出字元之前起作用的那個字符集,通常是返回到標準字符集。
  11. At the last we program the parameter detecting methods for frequency - shift track signal with c language and assembly language base on code composer studio of dsp. then we realize it on the dsp chip of tms320f2812. experiments shows that it can satisfy the demand of real time and precision

    最後在dsp的集成開發環境ccs ( codecomposerstudio )上採用c語言和匯編語言混合編寫移頻軌道信號的參數檢測演算法,並將該演算法移植到dsp晶元( tms320f2812 )上實現,測試結果表明上述演算法能夠滿足實時性和精度的要求。
  12. The authors argue that the fruits can be diagnosed online and exactly located by cycle shift of pattern vectors ' binary code

    通過對模式向量二進制編碼后進行牡循環移位實現對故障的在線診斷和精確定位。
  13. The method was correlate search and fft carrier detection, which could solve the problem of the capture of the spread spectrum code under the condition of low snr and big frequency offset. we also put forward a method, shift receiving window and correlate with local sequence, which not only could solve the problem of symbol synchronization but also could acquire the statistics of the multipath. then we utilized the results of the channel estimation and the technology of rake receiver to decode the received spread spectrum sequence and acquire rude information

    方案中提出了:相關搜索、 fft檢測信號載波的方法,解決了低信噪比、大頻差條件下擴頻碼的同步捕獲難題;滑動相關完成位同步的方法,解決了低信噪比下的同步問題;在時域利用相關進行通道估計,然後利用rake接收技術完成相關解擴的方法,一定程度上解決了多徑衰落影響解擴性能的問題。
  14. The character code 65, if it is pressed with the shift key

    字元代碼65 (如果與shift鍵一起按下)
  15. Menu, click stop debugging, press shift f5, or click the icon in the debugging toolbar, to stop code execution

    在「調試」菜單上單擊「停止調試」 ,再按shift + f5或單擊「調試」工具欄中的圖標,以停止執行代碼。
  16. To shift focus from the code editor to the navigation bar

    將焦點從「代碼編輯器」移到「導航欄」
  17. If you open a document or workbook from the getting started task pane, holding down shift does not bypass the code

    如果從「開始」任務窗格中打開文檔或工作簿,按下shift不會跳過代碼。
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