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OFDM Modulation and Demodulation
4.0
Cyclic prefix insertion is commonly used in orthogonal frequency division multiplexing (OFDM) systems as a way  to mitigate the effects of intersymbol-interference (ISI). It copies the end section of an inverse fast Fourier  transform (IFFT) packet to the beginning of an OFDM symbol. Usually the length of the cyclic prefix is longer  than the length of the dispersive channel to completely remove ISI. OFDM modulation therefore mostly revolves  around cyclic prefix: OFDM modulation includes IFFT operation and cyclic prefix insertion; OFDM demodulation  includes cyclic pr
huyrro911522
2016-08-23
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