Select the correct statement(s) regarding OFDM. a. in the frequency domain, each

ID: 3722545 • Letter: S

Question

Select the correct statement(s) regarding OFDM.

a. in the frequency domain, each subcarrier must be separated by a guard channel

b. subcarriers in the frequency domain overlap one another at a specified spacing that prevents adjacent subchannel interference

c. OFDM is considered a spread spectrum technology

d. b and c are correct

What is true about terrestrial microwave systems?

a. use of directional parabolic antennas are typically required for high data rate applications’

b. since transmission frequencies are very high, line-of-sight between communicating antennas is required

c. security is poor since transmissions are easily intercepted

d. all are true

Select the correct statement(s) regarding OFDM.

Answers - A & B

(A) in the frequency domain, each subcarrier must be separated by a guard channel - to reduce the interference between the adjacent channels

(B)subcarriers in the frequency domain overlap one another at a specified spacing that prevents adjacent subchannel interference

What is true about terrestrial microwave systems?

d. all are true

Use of directional parabolic antennas are typically required for high data rate applications.

Since transmission frequencies are very high, line-of-sight between communicating antennas is required

Security is poor since transmissions are easily intercepted

All the three points are correct w.r.t Terrestrial Microwave System

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