Question

Delay spread in signal propagation is due to:

• A. Guidance of waves through a single path
• B. Signals arriving at the receiver at different times
• C. Transmission of signals through wires
• D. Signals travelling along a straight line

Hint:

Delay spread is a major factor in wireless communication as it can lead to inter-symbol interference (ISI), affecting signal clarity in broadband and mobile networks.

Answer 1

The Correct Option is B

Step 1: Understanding Delay Spread
Delay spread is a phenomenon in wireless communication where a transmitted signal takes multiple paths to reach the receiver due to reflections, diffractions, and scattering. As a result, different copies of the signal arrive at the receiver at different times.
Step 2: Analyzing the Given Options
- Option (A) Guidance of waves through a single path: Incorrect, as delay spread occurs due to multiple paths.
- Option (B) Signals arriving at the receiver at different times (Correct): This is the precise definition of delay spread.
- Option (C) Transmission of signals through wires: Incorrect, as delay spread is primarily a wireless phenomenon.
- Option (D) Signals travelling along a straight line: Incorrect, as straight-line propagation would not cause delay spread.