COMPUTER FUNDAMENTALS

Detailed explanation-1: -One of the parameter of Time Dispersion Parameters is RMS (Root Mean square) delay spread which is anticipated in order to overcome the multipath propagation delays due to fading and it explains the nature of the received signal.

Detailed explanation-2: -Excess delay spread is the arrival time difference between the first and final multipath components (MPCs) at the receiver side. For example, suppose the first multipath component arrives at the receiver at time t1, and the last multipath component arrives at time t2. The Excess Delay Spread will then be (t2-t1).

Detailed explanation-3: -It is generally defined as the difference between the time of arrival of the earliest component (e.g., the line-of-sight wave if there exists) and the time of arrival of the latest multipath component. Delay spread is a random variable, and the standard deviation is a common metric to measure it.

Detailed explanation-4: -Time dispersion occurs when the channel is band-limited or when the coherence bandwidth of the channel is smaller than the modulation bandwidth. The time dispersion leads to inter-symbol-interference (ISI), where the energy from one symbol spills over into another symbol, thereby increasing the bit-error-rate (BER).