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Instructor: Dr Kumaresan
email: kumar@ele.uri.edu

TA : Vijay Kumar Peddinti
office hours: MF 9-10 (Kelley 201)
email: vijay@ele.uri.edu

Lab Schedule
Tuesday: 11AM to 2PM
Wednesday: 2PM to 4:45PM

In the lab students use TIMS (Telecommunication Instructional Modelling System) 301 Modeling systems, and Matlab.

Students are advised to join the mailing list. Click here to join the mailing list.

Labs

• Lab Policy

• Lab0 : Periodic Signals and the Fourier Series
  Grading/Report Format For Lab0
  MATLAB Results for Square Wave input   Triangle Wave input   Sawtooth Wave input  
  FFT : tutorial written by Jesse Hansen
  Fourier Series Approximation Johns Hopkins University Link

• Lab1 : Modeling an Equation and DSBSC Generation
  You will be using the TIMS 301 Modeling systems, here is the documentation
  Grading/Report Format For lab1

  MATLAB Hints and plots
  • MATLAB Hint To compute the filter coefficients:
    [b] = fir1(filter_order,Cutoff_freq/(sampling_freq/2),'filter_type');
    
    
  • MATLAB Results: When signals are inphase and out of phase
    DSBSC time domain signal and the Spectrum
    

• Lab2: Sampling Theorem
  Grading/Report Format For lab2
  New lab handout Sampling Theorem
  

• Lab3: Amplitude Modulation
  Grading/Report Format For lab3
  If you get a chance please check this Tutorial for Amplitude Modulation
  New lab handout Amplitude Modulation

  MATLAB plots
  • MATLAB Results for a cosine wave and the FFT: (you can also unwrap the phase)
    cosine wave   Real and Imaginary plots of FFT   Magnitude and Phase plots of FFT  
    

• Lab4: Envelope and Envelope Recovery
  Grading/Report Format For lab4
  New lab handout Envelope Recovery
  

• Lab5 Part a: PCM Encoding
  Please Note: There is no Grading/Report Format for this lab.
  Reference Sampling with Sample and Hold
  PCM Data for 0V input
  

• Lab5 Part b: PCM Decoding
  Grading/Report Format For lab5
  

  Additional Material
  • Wikipedia References for terms in the lab handout: "Companding" "A Law" "Mu Law"
    Also can be found in the textbook: Pages 147 to 152
    
  • PCM online tutorials Pdf file (L3 Communications) ppt file (www.signal.uu.se)
  MATLAB plots
  • MATLAB Results for Quantization: 8 levels   and 16 levels  
    

• Lab 6: FM   FM Generation   FM Demodulation
  Reference handout for FM
  Grading/Report Format For lab6
  

  MATLAB plots
  • FM spectra for:
    f2 = 1000Hz beta = 2   and beta = 8  
    f2 = 200Hz   beta = 2   and beta = 8  
    Demodulated signal Should be a sinusoid of frequency f2
    

• Lab 7: BPSK Generation   Demodulation
  

Announcements

• The Matlab section of Exam I is due Friday October 16th.
• Due date for Lab 2 Sampling Theorem extended till Monday, Oct 12 2009
• Check "Lab Policy" Under "Labs" for more details about lab reports

Latest Updates

• Posted Lab7, BPSK modulation, Demodulation -- 11/22/2009
• Posted Matlab Plots for Lab6 -- 11/02/2009
• Posted Preliminary version of Grading/Report Format for Lab6 -- 11/01/2009
• Posted Lab6, FM -- 10/28/2009
• Updated Grading/Report Format for Lab5 -- 10/27/2009
• Posted Preliminary version of Grading/Report Format for Lab5 -- 10/25/2009
• Posted the new lab handouts for Sampling Theorem, Amplitude Modulation -- 10/20/2009

Lab Pictures