Sub-channel equalizer design based on geometric interpolation for FBMC/OQAM systems

Author

Rocha, Carlos Aurélio Faria da ; Bellanger, Maurice G.

Author_Institution

GPqCom, Fed. Univ. of Santa Catarina, Florianopolis, Brazil

fYear

2011

fDate

15-18 May 2011

Firstpage

1279

Lastpage

1282

Abstract

The interpolation of complex signals is frequently encountered in the signal processing chains of high performance transmission systems. Linear interpolation might be inappropriate for this kind of situation and, here, geometric interpolation is proposed instead. Specifically, it is proposed, in a Filter Bank-based Multi-Carrier/Offset QAM (FBMC/OQAM) transmission system, to use geometric interpolation to determine the frequency domain intermediate points of each sub-channel needed to calculate the T/2-spaced sub-channel equalizer coefficients at the beginning of the burst. The equalizer coefficients are computed using the inverse fast Fourier transform (IFFT). This equalizer must compensate ISI and ICI caused by a selective channel and timing offset. Simulation results demonstrate the effectiveness of the proposed equalizer.

Keywords

adjacent channel interference; channel bank filters; equalisers; fast Fourier transforms; frequency-domain analysis; interference suppression; interpolation; inverse transforms; quadrature amplitude modulation; FBMC; ICI; ISI compensation; OQAM systems; equalizer coefficients; filter bank based multicarrier; frequency domain analysis; geometric interpolation; inverse fast Fourier transform; linear interpolation; offset QAM; signal processing; signal transmission; sub-channel equalizer design; Delay; Equalizers; Filter banks; Finite impulse response filter; Interpolation; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2011 IEEE International Symposium on

Conference_Location

Rio de Janeiro

ISSN

0271-4302

Print_ISBN

978-1-4244-9473-6

Electronic_ISBN

0271-4302

Type

conf

DOI

10.1109/ISCAS.2011.5937804

Filename

5937804