discrete carrier 中文意思是什麼
discrete carrier
解釋
離散載波-
The forming of signals, such as those employed in telegraph transmission, by the interruption of a direct current or modulation of a carrier between discrete values of some characteristics
斷開或接通直流電路或者在具有某些特點的離散值之間對載波進行調制而形成信號的過程和方法。如電報傳輸中使用的就是鍵控法。 -
In the synchronous techniques based pilot symbols, here propose a frequency offset estimating arithmetic using discrete pilot symbols. we pick up integer times sub - carrier frequency offset from the same ofdm symbol and estimate exact
此外，在頻偏估計方面，推導出短訓練序列前後兩段時域符號間的關系，並利用此進行粗頻偏估計，使頻率偏移的估計范圍大大增加。 -
As an implementing method of multi - carrier modulation ( mcm ), discrete multi - tone ( dmt ) modulation uses inverse discrete fourier transform ( idft ) vector as its modulating vector, and discrete " fourier transibrm ( dft ) vector as its demodulating vector, and the process of modulating and demodulating can be realized by using their fast calculating method
作為多載波調制的一種實現形式，離散多音頻（ dmt ）調制分別採用逆傅立葉變換矢量和傅立葉變換矢量作為調制矢量和解調矢量，從而調制和解調過程可以利用這兩種變換的快速演算法實現。 -
In this paper, aimed at the problems existed in theoretical analysis and application of ftm, the discrete fourier transform method is applied to analyze the traditional ftm ( tftm ). and computer simulation is applied. the main propose is to solve the problem, such as frequency shifting, selection of carrier frequency big or small and selection of filter window size. considering the feature of double - exposure holographic interferometry, we propose a modified ftm ( mftm )
針對二次曝光數字全息干涉術中ftm存在的理論缺陷和具體應用到二次曝光全息干涉計量中存在的問題，本文從離散傅立葉變換的角度對傳統的傅立葉變換法（ tftm ）進行了理論分析和計算機模擬計算，並重點致力於解決ftm中的移頻問題、載頻大小的選擇以及濾波窗口大小的選擇等關鍵問題，結合二次曝光全息干涉的特點提出了改進的傅立葉變換法（ mftm ） 。
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