Determination of separating capacity for chemical analysis filter paper 化學分析濾紙分離性能的測定法
The principle , structure and characteristics of the adc system has been discussed and studied , the main conclusions and contributions include : the general perfect reconstruction ( pr ) condition of linear phase prqmf banks is deduced mathematically , which consists of combination relation between analysis filter ' s odd length or even length and its symmetry or antisymmetry , relation of analysis filters " lengths and relation of the coefficients among different analysis filters 從理論上推導(dǎo)出了線性相位prqmf濾波器組理想重建的一般規(guī)律,該規(guī)律表現(xiàn)為分析濾波器組中: ( 1 )濾波器對稱性及其長度奇偶性的組合關(guān)系; ( 2 )濾波器的長度應(yīng)滿足的關(guān)系; ( 3 )非同一濾波器的系數(shù)之間應(yīng)滿足的關(guān)系。
A multiwavelet - based code - division multiple - access ( mw - cdma ) scheme is presented based on the application of recent results in multiwavelet analysis filter , preprocessing and balancing to communications area . in mw - cdma . at first , the received signal is decomposed into the components in the orthogonal wavelet spaces , and then the multiuser demodulation is implemented in each wavelet space 多子波分析濾波器可將信號投影到線性無關(guān)的子空間上進行處理使得cdma中的特征碼可以重復(fù)使用;時間上重疊的多個子波及其平移相互正交使得單位時間內(nèi)可傳輸更多的pn碼;優(yōu)化設(shè)計的多子波時頻特性使得頻帶的利用更為有效。
Abstract : all three types of transmultiplexer are explained from the view of filter banks . addtionally , an optimal algorithm for the analysis filter banks is proposed under the environment of additive white gauss noise ( awgn ) . the analysis filter banks derived from the algorithm can match the spectrum characteristics of the input siganls 文摘:從濾波器組的角度出發(fā),對多路復(fù)用通信方式進行了解釋,同時給出了高斯加性白噪聲情況下分析濾波器組的最優(yōu)求解方法,通過該方法得到的分析濾波器組能夠較好地跟蹤輸入信號的譜特性。