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In wireless communications, fading is the variation of signal attenuation over variables like time, geographical position, and radio frequency. Fading is often modeled as a random process. In wireless systems, fading may either be due to multipath propagation, referred to as multipath-induced fading, weather (particularly rain), or shadowing from…
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signal channel time frequency receiver diversity coherence also ofdm phase fade channels may wireless different change doppler communication experience interference
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Fading | is a | variation of signal attenuation over variables like time | 0.90 | text |
| Fading | is a | radio propagation anomaly caused by partial cancellation of a radio signal by itself | 0.90 | text |
| shadowing | instance of | Slow fading can be caused by events | 0.80 | text |
| where a large obstruction such as a hill or large building obscures the main signal path between the transmitter | instance of | Slow fading can be caused by events | 0.80 | text |
| the receiver | instance of | Slow fading can be caused by events | 0.80 | text |
| orthogonal frequency-division multiplexing | instance of | Certain modulation schemes | 0.80 | text |
| application of cyclic prefix | instance of | techniques | 0.80 | text |
| Fading | related to Block fading | Block | 0.60 | section |
| Fading | related to Block fading | Many | 0.60 | section |
| Fading | related to Block fading | In | 0.60 | section |
| Fading | related to Block fading | Typically | 0.60 | section |
| Fading | related to Block fading | Rayleigh | 0.60 | section |
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