Frequency-Domain Equalization Incorporated with Frequency-Domain Redundancy for OFDM Systems

This paper proposes a frequency-domain equalizer (FEQ) which utilizes not only guard interval but also redundancy in the frequency domain to eliminate inter-symbol and intercarrier interferences. The proposed FEQ employs the hybrid criterion, i.e., the zero-forcing (ZF) criterion for compensating de...

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Bibliographic Details
Main Authors: Okazaki, A., Motoyoshi, K., Higashinaka, M., Nagayasu, T., Kubo, H., Shibuya, A.
Format: Conference Proceeding
Language:English
Subjects:
Computational complexity
Equalizers
Finite impulse response filter
Forward error correction
Frequency domain analysis
Interference suppression
Mean square error methods
Mobile communication
OFDM
Redundancy
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Summary:This paper proposes a frequency-domain equalizer (FEQ) which utilizes not only guard interval but also redundancy in the frequency domain to eliminate inter-symbol and intercarrier interferences. The proposed FEQ employs the hybrid criterion, i.e., the zero-forcing (ZF) criterion for compensating desired subcarriers and the minimum mean square error (MMSE) criterion for suppressing interference. The proposed hybrid-FEQ achieves a good equalization performance, because it can suppress the noise enhancement caused by the ZF criterion with relatively small computational complexity exploiting soft-decision forward error correction (FEC). In this paper, we show its equalization performance and complexity compared with the conventional FEQs
ISSN:2166-9570
DOI:10.1109/PIMRC.2006.254430