Spread

Delay spread in wireless communication

Delay spread in wireless communication
  1. What is delay spread in wireless communication?
  2. What is delay spread and Doppler spread?
  3. What are the effects of delay spread?
  4. What is delay spread in OFDM?

What is delay spread in wireless communication?

Delay spread is a measure of the multipath profile of a mobile communications channel. 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.

What is delay spread and Doppler spread?

Delay spread helps determine coherence bandwidth and coherence time of a wireless system. Doppler Spread: Doppler frequency shift is usually different from path to path when signal arrives at the wireless receiver.

What are the effects of delay spread?

Frequency-selective fading caused by multipath time delay spread degrades digital communication channels by causing intersymbol interference, thus resulting in an irreducible BER and imposing a upper limit on the data symbol rate.

What is delay spread in OFDM?

The delay-spread information provided by the proposed technique can be adaptively used to improve the accuracy of the frequency domain channel response interpolation process in OFDM systems. Published in: 2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).

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