Write a 3- to 5-page paper comparing the advantages of Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Code Division Multiple Access (CDMA), and Orthogonal Frequency Division Multiplexing, as used in wireless mobile communications.

Define the technical details of each access method, then compare their strengths and weaknesses in system use.

Address the following:

· Explain radio frequency (RF) transmission characteristics.

· Identify common frequency bands used in current RF communications.

· Analyze the necessity for different protocols in wireless communications.

· Compare the challenges of using satellites in end-to-end communications links.