This paper derives new implementations of the baseband and passband OFDM-OQAM scheme, that allow to nearly halve the number of arithmetic operations required every symbol period, by exploiting the symmetries in the transmitted sequences. It also propose a novel scheme, named Conjugate, that employs two different filters being the time reversed version of each other, one in the modulator for the even subchannels and in the demodulator for the odd ones, the other in the modulator for the odd subchannels and in the demodulator for the even ones.
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