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Introduction to DSSS (Spread Spectrum)
In this lab, students will recover a variety of messages from an amplitude modulated carrier signal and develop an understanding of the demodulation process. Designed for NI ELVIS III.
Modeling Equations
In the lab students will investigate the addition of two signals and compare the theoretical calculation with measured results. Designed for NI ELVIS III.
Double Sideband Modulation and Demodulation (DSBSC)
Students will create a DSBSC signal and gain insight into the meaning of “Suppressed Carrier," and they will use product demodulation to recover the message and examine the effect of phase and...
Amplitude Demodulation
In this lab students use the Emona Communication board to learn two methods for amplitude modulation (AM) and demodulation. Designed for NI ELVIS III.
FM Modulation
In this lab, students will generate a frequency modulated signal using a variety of message sources, measure the power and bandwidth, and calculate the frequency deviation of the modulator circuit....
SSB Modulation and Demodulation
Students will generate an SSB signal by implementing the mathematical model for the phasing method, and then use a product detector (with a stolen carrier) to recover the message. Designed for NI...
Sampling and Reconstruction
Students will sample a message using sample-and-hold scheme, examine the message in the frequency domain, reconstruct the message, as well as explore the relationship between sampling frequency and...
Lab 2: Amplitude Modulation
This laboratory exercise has two objectives: to gain a firsthand experience in actually programming the USRP to act as a transmitter and a receiver, and to investigate classical analog amplitude...
FM Demodulation
In this lab, students construct a demodulation process that translates the frequency variations of a frequency modulated signal into voltage variation in a linear manner. Designed for NI ELVIS III.
FFT and Spectra
In this lab, students will investigate the frequency spectrum of common signals by using the FFT mode of the Oscilloscope and relate this to the signals in the time domain