Howtosignalprocessing
- What causes intersymbol interference?
- What is intersymbol interference in communication?
- How intersymbol interference affects the bandwidth in optical fiber communication?
- How can we prevent intersymbol interference at the receiver?
- What is band-limited channels?
What causes intersymbol interference?
ISI is usually caused by multipath propagation or the inherent linear or non-linear frequency response of a communication channel causing successive symbols to blur together. The presence of ISI in the system introduces errors in the decision device at the receiver output.
What is intersymbol interference in communication?
Intersymbol interference (ISI) is a phenomenon in which the energy of a symbol spills over into succeeding symbols causing interference. Tight filtering at the transmitter and receiver and/or channel distortion can cause the waveform that represents a symbol to spread out into succeeding symbol periods.
How intersymbol interference affects the bandwidth in optical fiber communication?
It causes increase in path loss, delay spread, degraded performance, achieving high data rates becomes impossible, and power penalty increases due to ISI increases due to shortest slot durations.
How can we prevent intersymbol interference at the receiver?
Equalization. The use of an equalization scheme, such as distributed feedback equalization, is intended to recover signals through an estimation algorithm. This will, ideally, remove intersymbol interference or other noise that may be superimposed on the received signal.
What is band-limited channels?
band-limited channel A transmission channel with defined finite bandwidth. All physically realizable channels are band-limited by the constraints of the transmission medium and the drivers and receivers. The bandwidth may be deliberately constrained by filtering to limit the emission of or susceptibility to EMI.
