1. Explain the purpose of digital carrier communications.
2. Describe the line codes and modulation techniques to create ASK, FSK, and PSK signals.
3. Determine the power spectral density for different modulation techniques.
4. Evaluate the received signal for different modulation techniques.
5. Explain why non-coherent or coherent detection can be used for different modulation techniques.
6. Calculate the error probability for the different methods.
7. Explain M-QAM systems and the performance based on symbol constellations.
8. Determine the probability of error for M-QAM.
9. Design an M-QAM system to meet certain power, data rate, and error constraints.

1. Explain how frequency hopping and spread spectrum technologies work.
2. Calculate the delay spread of a channel and determine if it is a frequency selective channel.
3. Describe how OFDM technology combats a frequency selective fading channel.

1. Explain what entropy is and calculate entry for a source.
2. Compress a source and find the average length, efficiency, etc.
3. Explain and show how batching can increase compression efficiency.

(There are 4-5 questions or less, upload one every time you complete one)(Once you received the questions you need to finish them in 140 minutes)(Please make sure that you can complete the questions within this scope)(Questions will be posted after we start)