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Comparison of two FFT structures for fractionally-spaced frequency domain equalizers

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Authors
Ryu, Jae-Ho; Lee, Kwang-Bok; Lee, Yong-Hwan
Issue Date
2002-05
Citation
VTC Spring 2002. IEEE 55th Vehicular Technology Conference, vol. 4, pp.1710-1713, 2002
Keywords
FFTequalizerfast Fourier transforms
Abstract
A fractionally-spaced frequency domain equalizer (FS-FDE) is needed to transform a received signal into the frequency domain. We consider two fast Fourier transform (FFT) schemes, one with a single 2N-point FFT and one with two N-point FFTs, for the transform of oversampled N symbol data in the FS-FDE receiver. It is shown that the two receiver schemes are equivalent in terms of the characteristics of the FFT output, per-bin SNR after maximum-ratio combining, computational complexity and the residual out-of-band noise rejection property. These properties are verified by computer simulation in additive white Gaussian noise (AWGN) and typical multipath channel.
Language
English
URI
http://www.ewh.ieee.org/soc/vtc02spring/

https://hdl.handle.net/10371/7271
DOI
https://doi.org/10.1109/VTC.2002.1002912
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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