Guard Interval
The Guard Interval is the ratio of the Cyclic Prefix "CP"
time to the inverse FFT time "T(IFFT)."
The guard interval is used to eliminate inter-symbol and inter-carrier interference. A copy of the last guard interval T(GI) of
the useful symbol period "T(IFFT)", termed Cyclic Prefix "CP", is used to collect multipath, while maintaining the orthogonality of the subcarriers. Each symbol is transmitted for a slightly longer time,
extended symbol time T(s), than the active......
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