Spectral Analysis of Sinusoidal Signals Consider g[n]=cos(0on+φ)，-o<n<o It can be expressed as gl川=ea,n+)+eon+） Its DTFT is given by G(ejo)=n∑ej06(o-0+2π) =-00 00 +π ej06(o-oo+2π =-00Spectral Analysis of Sinusoidal Signals Its DTFT is given by g[n] = cos(ωon +φ), − ∞ < n < ∞ ( ) ( ) ( ) 2 1 [ ] ω +φ − ω +φ = + j n j n g n e o e o = ∑ − + ∞ =−∞ ( ) π δ (ω ω 2π) ω φ o j j G e e + ∑ − + ∞ =−∞ −  π δ (ω ω 2π) φ o j e Consider It can be expressed as