OFDM Modulation and Demodulation
2016-08-23
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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
vhdl
ofdm
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