@inproceedings{discovery10080752,
         journal = {IEEE Vehicular Technology Conference},
       publisher = {IEEE},
            year = {2019},
           title = {Quadrupling the data rate for narrowband internet of things without modulation upgrade},
           month = {June},
       booktitle = {2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)},
         address = {Kuala Lumpur, Malaysia},
            note = {This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.},
            issn = {1550-2252},
          author = {Liu, X and Darwazeh, I},
        abstract = {This work proposes a novel signalling method for
Narrowband Internet of Things (NB-IoT) mobile system where a
quadrupled data rate can be achieved by combining two orthogonal techniques; the frequency orthogonal Fast-Orthogonal Frequency Division Multiplexing (Fast-OFDM) scheme coupled with
the time orthogonal Hilbert transform (HT) pair. In this paper,
the orthogonality features of one dimension in Fast-OFDM and of
the HT pair are explored. The newly designed system structure
is presented where the HT pulse pair is generated by square
root raised cosine (SRRC) filter with a matched configuration
at the receiver. System performance is investigated in terms of
bit error rate (BER), effective data rate and spectral efficiency.
Simulation results show that the HT-Fast-OFDM system provides
4 times the data rate relative to an OFDM system employing the
same modulation scheme and occupying the same bandwidth.
Furthermore, the proposed system has compelling advantages
over 16-QAM OFDM for it achieves a better BER performance
at the same spectral efficiency},
             url = {https://doi.org/10.1109/VTCSpring.2019.8746685},
        keywords = {Fast-OFDM, Hilbert transform pair, data rate,
spectral efficiency, NB-IoT}
}