echo degree 中文意思是什麼

echo degree 解釋
回聲度
  • echo : n (pl echoes)1 回聲,反響;共鳴,反映。2 重復,摹仿;摹仿者;應聲蟲。3 【音韻學】與上句末音押韻...
  • degree : n. 1. 程度;等級。2. 階層,地位。3. 學位,學術。4. 度,度數。5. 【數學】次;冪。6. 【音樂】階,度,音程。7. 【語法】(形容詞和副詞的)級。8. 【法律】親等。
  1. From the result we get the following conclusion : for narrow - band signal, the effect of the method based on fft is best. for wide - band signal, when snr is up to certain degree ( higher than - 7db or so ), the curves of square error of modified methods are more obvious and closer to crb. for an echo composed of more than one frequency or direction, space - frequency distribution could show more direct information of frequency and direction, which is more advantaged to make precise judge and estimation for doa of echo

    從估計結果發現,對于窄帶回波信號,基於fft的方法估計性能大大優于其他方法;對于寬帶回波信號,在信噪比達到一定程度(高於約- 7db )時,補償后的幾種估計法的性能改善均比較明顯,誤差曲線越來越接近crb曲線;對于回波中存在多頻率多方位的情況,空間?頻率分布圖能提供較為直觀的頻率及方位信息,因此應用空間?頻率估計法來進行方位估計,更有利於進一步對回波的具體方位進行準確判斷和估計。
分享友人