Question

Which of the following breaks a signal into many lower rate bit streams where each is less susceptible to multipath problems? A) MIMO B)OFDM C)Channel Coding D) DSSS E) Equalization

Answer 1

Answer: OFDM

Explanation:The correct answer is B) OFDM (Orthogonal Frequency Division Multiplexing).

OFDM is a modulation technique used in wireless communication systems to transmit data over multiple subcarriers. It breaks a high-rate signal into several lower-rate subcarriers, each carrying a part of the original signal. These subcarriers are orthogonal to each other, meaning they do not interfere with one another.

OFDM is particularly effective in mitigating the effects of multipath propagation, where signals can take multiple paths due to reflection, diffraction, and scattering. Since the subcarriers are transmitted in parallel, they can be received and processed independently, making OFDM less susceptible to multipath problems.