On single-tap equalization for an FBMC multicarrier system in wireless channels

•The FBMC-PAM transceiver is a multicarrier scheme, based on pulse amplitude modulation (PAM) combined with a sine prototype filter with overlapping factor K=2, that can meet the requirements of cognitive radio (such as high level of adjacent channel leakage ratio and asynchronous communications) an...

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Bibliographic Details
Published in:Signal processing 2022-05, Vol.194, p.108434, Article 108434
Main Authors: Mattera, Davide, Tanda, Mario, Bellanger, Maurice
Format: Article
Language:English
Subjects:
Dispersive channel
Engineering Sciences
FBMC
MMSE
PAM
Single-tap equalization
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Summary:•The FBMC-PAM transceiver is a multicarrier scheme, based on pulse amplitude modulation (PAM) combined with a sine prototype filter with overlapping factor K=2, that can meet the requirements of cognitive radio (such as high level of adjacent channel leakage ratio and asynchronous communications) and outperforms OFDM as well as OFDM-OQAM systems in terms of CFO sensitivity.•Single-tap zero-forcing and more complex FFT-based equalization structures have been considered for FBMC-PAM systems. These FFT-based structures ensure a significant performance gain when channel dispersion cannot be neglected.•Researches dedicated to determine solutions able to achieve a better trade-off between complexity and performance are much useful.•In this paper the receiver based on the optimum single-tap gain in the minimum mean square error sense is derived and its performance is compared with that of previously considered receivers.•It is shown that, when the zero-mean output of the standard matched filter is noncircular, the proposed equalizer is superior to the existing single-tap alternative solution and comes close in performance to a more advanced FFT-based structure. This paper deals with single-tap equalization for the recently introduced FBMC-PAM system, a multicarrier scheme able to meet the requirements of cognitive radio such as high level of adjacent channel leakage ratio and asynchronous communications. The optimum single-tap gain in the minimum mean square error (MMSE) sense is derived and its performance is compared with that of previously considered receivers. It is shown that, when the zero-mean output of the standard matched filter is noncircular, the proposed equalizer is superior to the existing single-tap alternative solution and comes close in performance to a more advanced previously considered structure.
ISSN:0165-1684
1872-7557
DOI:10.1016/j.sigpro.2021.108434