Reference no: EM132535401

Questions:

Question 1: What do these terms stand for? TDM, FDM, CDMA, FDMA, TDMA.

Question 2: Why is FDMA (Frequency Division Multiple Access) using radio more difficult to coordinate than FDM (Frequency Division Multiplexing) on a single cable?

Question 3: A frequency-hopping spread-spectrum system hops to each of 300 frequencies every 15 seconds. How long does it spend on each frequency?

Question 4: How random is "pseudo-random noise" in a frequency-hopping system?

Question 5: How many methods are there for doing spread-spectrum?

Question 6: Can TDM (Time-division multiplexing) be used for analog signals?

Question 7: Is this a correct statement? " With CDMA, all stations can be transmitting on the same band at the same time".

Question 8: Why is high frequency radio wave propagation over long distances better during peaks in the sunspot cycle?

Question 9: When do we use TDMA instead of TDM?

Question 10:  What is the difference between "Processing gain" and "Spreading gain"?

Question 11: What do TDR, HF, SWR, VSWR, EIRP stand for?

Question 12: Name at least 3 forms of ElectroMagnetic radiation.

Question 13: At what frequencies are the "Ground waves" most effective?

Question 14:  Why can AM (Amplitude Modulation) radio stations often be received at distances beyond the horizon?

Question 15: What is the input impedance to a lossless antenna at resonance?