The combo of User Defined Bit Sequence Generator (BSG) and Return-to- Zero pulse Generator produces a digital pulse spectrum
depending upon their inputs.
First, we see that root raised cosine pulse spectrum
is a real and even function of frequency, f.
But it is possible to compensate the frequency dependent power degradation by optimizing the input pulse spectrum.
pm-im]([omega]) as its amplitude variation may be compensated by modifying the input chirp-free pulse spectrum .
The computer simulations and experiments of the P-SPM and CW SPM measuring techniques allow for the statement that in the method with a laser source of pulses the OF influence on the propagation of optical signal is noticeably greater, since there is pronounced pulse spectrum
extension due to a shift in the nonlinear phase; in turn, in the case of a CW laser source in the spectrum infinitesimal additional spectral components arise.
Hence, the narrower pulse spectrum
magnitude will be down in the middle but up on the sides compared to the wider pulse spectrum
In particular, the overshoot and ringing with Chebyshev filters was determined to be severe when the incoming pulse spectrum
was not centered within the filter bandwidth.
However, the pulse spectrum
of a soliton, as well as its shape, changes little over great distances.
7% of signal energy is concentrated into main lobe of pulse spectrum
Preferably it could be the dominating first harmonic but similarly behaves also any harmonic which has a noticeable value in single pulse spectrum
The continuous transform was used in this case to calculate the pulse spectrum
over an unsymmetrical frequency range, necessary for placing the pulse at different positions relative to the IF band center in the analysis.
The pulse spectrum
appears as a sin(x)/x spectrum on the analyzer's display, as shown in Figure 7.