EE 421: Introduction to Wireless Communications

• Syllabus
• AM: Here's a zip file of a demo simulating AM with a sine wave (am_sine.m) and another with a wav file (am_wav.m).
• Sampling:  Zip file of a demo simulating the effect of increasing the frequency of a sine wave beyond fs/2..
• Pulse Bandwidth:  Zip file of a demo displaying three pulse shapes, their spectrum, and computation of their bandwidths.
• Digital Modulation (the following are zip files of Matlab directories)
• OOK modulation with noise demo.
• Simple BPSK modulation with noise demo.
• BPSK modulation with timing and phase estimates demo.
  

Assignments

• Understand and experiment with this implementation of a simple Binary PSK tranceiver using ASCII data.
• Experiment with this implementation of a simple Binary PSK tranceiver using random data.  In particular: 
• Understand the difference between Power SNR and Energy SNR.
• Vary the pulse duration and noise variance.
• Adjust the phase error.
• Compare the emperical bit-error-rate (BER) with the theoretical error probability (Pe).
• Understand and modify this implementation of a Binary PSK tranceiver using random data.  In particular: 
• Locate the error causing the data to be reversed.
• Fix and experiment with the quality of the phase estimate versus noise power.
• Compare the emperical bit-error-rate (BER) with the theoretical error probability (Pe)
• Understand this set of files (edited in class) including Binary PSK, CFSK, and NFSK .
• Compare the emperical bit-error-rate (BER) with the theoretical error probability .

Handouts

• Notes on the (7,4) Hamming code.
• Paper on the Communications Aspects of CD's.
• Sheet of theoretical error probabilities.