It is known that high-pass filtered images can be treated as a form of 2D amplitude modulation signals (Peli, 1992); but what is more important is that this statement can also be extended to images that have been
band-pass filtered with symmetric filters (Papoulis, 1962, p.
The deviation of the series from the trend is the gap: [Y.sub.t.sup.Gap] = [Y.sub.t] - [Y.sub.t.sup.Trend] = [1 - [c.sup.Trend](L)][Y.sub.t], so that the
band-pass filter for the gap is 1 - [c.sup.Trend](L).
It is a good example of using wavelet decomposition as a
band-pass filter.
First we outline some important concepts from frequency domain analysis and show that the construction of the
band-pass filter can be viewed as a building block in the construction of the spectral representation of an economic variable.
To produce optimum results, the MakerBot Digitizer's camera is fitted with a
band-pass filter which rejects all wavelengths other than that of the laser, ensuring that the camera only records the laser lines on the object.
As studied in [25], for a ring resonator
band-pass filter, two TZs are produced in the lower and upper cutoff edges of the desired pass band resulting from electric currents in the two propagation paths (Path 1 and Path 2) canceling each other.
It acts as a
band-pass filter in the microwave frequency range and it can be also used in sensor applications.
Here proposed filtering applications can be divided to two groups: (i) first-order reconfigurable filter, (ii) second-order
band-pass filter. Comparison of selected solutions of first-order active filters in single-ended, fully-differential, or pseudodifferential form [10]--[14] is available in Table I.
The manufacturing techniques for third-order
band-pass filter based on SIW are given.
The function of the T-shape stub is as a resonator at 3.5 GHz, while the micro-strip lines work as a
band-pass filter at 5.5 GHz.