頻帶重疊 的英文怎麼說
中文拼音 [bīndàizhòngdiě]
頻帶重疊
英文
band overlapping-
Doing the further research on the division frequency stack on the foundation of study of predecessor, at first the residual moveout correction is done to the seismic record, make the phase axle regularity, doing foundation for the same phase stack ; then carried on division scale processing by wavelet transform ; spectrum whitening is done to each scale, the high and low frequency band need to do prolongs, the middle frequency bands only increase the value of the frequency spectrum ; several kinds of methods that estimate the value of signal - noise ratio has been studied further, and summarize their advantage and disadvantage as well as the scope of application ; the seismic record after spectrum whitening is stacked by weighting with the value of the signal - noise ratio ; then estimate the value of signal - noise ratio which is each scale section after stacking, the scale that the signal - noise ratio is big is assigned big weighting, otherwise, the scale that signal - noise ratio value is small is assigned small weight ing, and carried on weighted reconstruct to each scale section
本文在前人研究的基礎上，在分頻疊加方面做了進一步的研究。首先對地震記錄進行剩餘時差校正，校齊同相軸，為同相疊加做好基礎工作；然後對地震記錄用小波變換的方法進行分尺度處理；對各個尺度分別做譜白化，對于高、低頻段需要做頻帶延拓，中間頻段僅提升頻譜值；對于幾種信噪比定量估計的方法進行了深入的研究，並且總結了它們的優缺點以及適用范圍；對譜白化后的地震記錄用信噪比估計值作為加權系數進行加權疊加；對于各尺度的疊加剖面也進行信噪比估計，對于信噪比大的尺度給予大的加權系數，反之，信噪比值小的尺度給予小的加權系數，對各尺度疊加剖面進行加權重構。Some valuable conclusions are given by simulation experiments for a kind of anti - radiation - missile attacking dual sources. 6. the method for prs counteracting interference of two noise fm jammers is presented
對于兩個頻基本重疊的窄帶瞄準式噪聲調頻干擾源，提出了prs跟蹤兩個干擾源中大功率源的方法。For getting better filter performance, we design quadrature mirror filter banks using window function method. considering the frequency response of filter change rapidly, we make the filter is perfect reconstruction on the point of center frequency. the error of reconstruction is small by the point
考慮到濾波器組在過渡帶出現的其幅頻特性變化的情況，選擇在兩個濾波器交疊的中心頻率處，使其滿足濾波器的完全重構條件，其附近頻率處的誤差也降到很小的范圍之內。
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