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Design of isotropic orthogonal transform algorithm-based multicarrier systems with blind channel estimation

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4 Author(s)
J. Du ; Sch. of Electr. Eng., R. Inst. of Technol. (KTH), Stockholm, Sweden ; P. Xiao ; J. Wu ; Q. Chen

Orthogonal frequency division multiplexing (OFDM) technique has gained increasing popularity in both wired and wireless communication systems. However, in the conventional OFDM systems the insertion of a cyclic prefix (CP) and the transmission of periodic training sequences for purpose of channel estimation decrease the system's spectral efficiency. As an alternative to OFDM, isotropic orthogonal transform algorithm (IOTA)-based multicarrier system adopts a proper pulse shaping with good time and frequency localisation properties to avoid interference and maintain orthogonality in real field among sub-carriers without the use of CP. In this study, the authors propose linearly precoded IOTA-based multicarrier systems to achieve blind channel estimation by utilising the structure of auto-correlation and cross-correlation matrices introduced by precoding. The results show that the proposed IOTA-based multicarrier systems achieve better power and spectral efficiency compared with the conventional OFDM systems.

Published in:

IET Communications  (Volume:6 ,  Issue: 16 )