distortion shift 中文意思是什麼

distortion shift 解釋
畸變位移
  • distortion : n. 1. 歪扭，扭曲。2. 【電學】（信號、波形等的）失真；【物理學】（透鏡成像產生的）畸變；【醫學】扭轉，變形。3. 竄改，歪曲，曲解。adj. -al
  • 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...
  1. On the following, on the basis of formulas given above, three kinds of effects due to ionosphere are presented : image shift due to group delay which was caused by the difference between the group velocity and the velocity of light in the ionosphere ; image distortion due to ionospheric dispersion which can create second phase error of lfm signals ; the last, the phase perturbation caused by the irregularities of the ionosphere can reduce the coherent length and affect azimuthal resolution

    文中主要研究了電離層的三種影響：信號經過電離層傳播的群延遲引起的成像偏移；電離層的色散效應給線性調頻信號帶來二次相位誤差，導致圖像退化、失真；以及電離層的閃爍、湍流等不規則性引起的信號相位起伏。在此基礎上，比較分析了不同波段、帶寬條件下電離層的影響。
  2. When snris below to some extent, the distortion of signal will be so great that the new randomshift invalidates the algorithm, so an improved adaptive centroid estimation algorithmis presented according to signal grouping and the principle of grouping is analyzed. correlation function algorithm is a classical method on shift estimation

    由於當信噪比低到一定程度時，有用信號的損失過大，會導致引入新的隨機時移，使演算法完全失效，因此通過將信號分組的方式提出改進的自適應質心估計演算法，並對分組的原則進行研究。
  3. Taxation is a distortion to the perfect economic system. individuals are also expected to arbitrarily adjust their economic behaviours so that they may avoid or shift the tax burden to others

    任何稅制都會令一個完善的經濟體系產生偏差，一般人亦都會很自然地透過各種經濟行為逃避付稅或將付稅責任轉嫁他人。
  4. In case where long - range communication is needed, spatial diversity blind equalizer ( sdbe ) is an effective way to improve snr and suppress distortion. joint carrier phase recovery with sdbe using second order digital phase lock loop is presented to track the doppler shift, and a kind of quantization method is used to reduce the complexity of the multi - channel algorithm. its performance is very similar to the original one

    模擬結果表明，採用二階數字鎖相環的空間分集均衡演算法的跟蹤性能超過了採用一階鎖相環和未加鎖相環的演算法，可有效補償由於水聲通道時變而引入的載波相位快速變化；採用誤差量化的演算法和原演算法的收斂和踉蹤性能都很接近。
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