1 / 3

Fourier Application to Signal Modulation and Demodulation

Fourier Application to Signal Modulation and Demodulation. 3.8 Kamen and Heck. 3.8.1 Amplitude Modulation. s(t) = Ax(t) cos(  c t) Acos(  c t)—carrier signal x(t) is the information signal Figure 3.31 Example 3.19—Figure 3.32

victoria-randolph
Download Presentation

Fourier Application to Signal Modulation and Demodulation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fourier Application to Signal Modulation and Demodulation 3.8 Kamen and Heck

  2. 3.8.1 Amplitude Modulation • s(t) = Ax(t) cos(ct) • Acos(ct)—carrier signal • x(t) is the information signal • Figure 3.31 • Example 3.19—Figure 3.32 • The Modulation Property can be used to determine the Fourier Transform of the signal—Figure 3.33. • S() = A/2 [X( + c) + X( - c)]

  3. 3.8.2 Alternative Form of AM • s(t) = A[1 + k x(t)] cos(ct) (3.77) • k is a positive constant called the amplitude sensitivity. • 1 + k x(t) > 0 for all t • Example 3.20—Fig. 3.34. • S() = A [( + c) + ( - c)] + Ak/2 [X( + c) + X( - c)] • DSB-SC vs. DSB

More Related