second-order doppler shift 中文意思是什麼

second-order doppler shift 解釋
二次多普勒位移
  • second : adj 1 第二的；第二次的；二等（的）。2 次等的；較差的；劣於…的 （to）。3 〈美國〉較年輕的。4 另一...
  • order : n 1 次序，順序；整齊；（社會）秩序，治安；狀況，常態；健康狀態；條理；會場秩序；議事程序，日程；...
  • doppler : 多普勒效應
  • 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. And then the stability and the stable error response of the dpll are analyzed. there is an obvious doppler shift frequency offset in the received signal with flight at a high speed, in the dissertation the uniform sampling second - order dpll is used to remove the frequency bias for its excellent high - pass characteristic of the error transfer function

    由於高速飛行的遙測目標在接收信號中會出現較大的多普勒頻率分量，而典型均勻采樣二階數字鎖相環dpll （ digitalphase - lockedloop ）的誤差函數具有高通特性，所以本文提出一種利用其高通特性來去除多普勒頻率分量的新方法。
  2. 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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