Two Cosines (``In-Phase'' Case)
Figure 5.7 shows a spectrum analysis of two cosines
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(6.17) |
where













The longest window (
) resolves the sinusoids very well, while
the shortest case (
) does not resolve them at all (only one
``lump'' appears in the spectrum analysis). In difference-frequency
cycles, the analysis windows are two cycles and half a cycle in these
cases, respectively. It can be debated whether or not the other two
cases are resolved, and we will return to them shortly.
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One Sine and One Cosine ``Phase Quadrature'' Case
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