Forward discrete/inverse-discrete Fourier transform device and method for optical OFDM communication and transmitting and receiving apparatus comprising the device
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United States of America Patent
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Apr 7, 2015
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Jun 28, 2012
app pub date -
Mar 6, 2012
filing date -
Jan 4, 2008
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Disclosed are a forward discrete/inverse-discrete Fourier transform device and method for optical orthogonal frequency division multiplexing (OFDM) communication and a transmitting and receiving apparatus. The forward inverse-discrete Fourier transform device includes N 1:N splitters for splitting subcarrier signals received from N inputs corresponding to the number of optical frequencies of subcarriers, a phase shift delay array module for shifting phases of the split signals from the 1:N splitters, N N:1 power couplers for coupling signals output from the phase shift delay array module, a time delay array module for performing time delay on optical OFDM symbols from the N:1 power couplers, and an N:1 power coupler for coupling signals output from the time delay array module.
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