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Conjugate-Root Offset-QAM for Orthogonal Multicarrier Transmission
Current implementations of OFDM/OQAM are restricted to band-limited symmetric
filters. To circumvent this, non-symmetric conjugate root (CR) filters are
proposed for OQAM modulation. The system is applied to Generalized Frequency
Division Multiplexing (GFDM) and a method for achieving transmit diversity with
OQAM modulation is presented. The proposal reduces implementation complexity
compared to existing works and provides a more regular phase space.
GFDM/CR-OQAM outperforms conventional GFDM in terms of symbol error rate in
fading multipath channels and provides a more localized spectrum compared to
conventional OQAM.Comment: 4pages, revised version submitted to IEEE WC
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