A MMSE Joint Feedback Feed-forward Equalizer for FBMC-OQAM Baseband Receiver in the 60 GHz Band

Chun Yi Liu; Edmund Wen Jen Leong; Chang Ting Wu; Meng Siou Sie; Henry Lopez; Chih-Wei Jen; Shyh-Jye Jou

doi:10.1109/JETCAS.2017.2748565

A MMSE Joint Feedback Feed-forward Equalizer for FBMC-OQAM Baseband Receiver in the 60 GHz Band

Chun Yi Liu^*, Edmund Wen Jen Leong, Chang Ting Wu, Meng Siou Sie, Henry Lopez, Chih-Wei Jen, Shyh-Jye Jou

^*Corresponding author for this work

Institute of Electronics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

In this paper, a minimum mean square error (MMSE) joint feedback feed-forward equalizer (MJFFE) is proposed to deterministically suppress the inter-symbol interference and inter-carrier interference that arose from the filter bank multi-carrier in a long multipath channel of the 60-GHz indoor wireless transmission. The decision device is discarded in the decision feedback loop to reduce error propagation while at the same time applying the MMSE criterion to prevent over compensation influenced by additive white Gaussian noise. As a result, in an non-line-of-sight (NLOS) channel with 7.65-ns rms delay spread, a 3-tap MJFFE provides 3-dB improvement at the bit error rate (BER) 10 ^-2 crossing and improve error floor effect at the BER 10 ^-3 crossing, as compared with the 1-tap zero-forcing equalizer. Furthermore, the proposed equalizer coefficients calculation based on linear convolution for the MJFFE is also presented. The hardware complexity achieves 50% reduction by using several methods including multiplexing, memory sharing, and computation element sharing.

Original language	American English
Article number	8025344
Pages (from-to)	558-568
Number of pages	11
Journal	IEEE Journal on Emerging and Selected Topics in Circuits and Systems
Volume	7
Issue number	4
DOIs	https://doi.org/10.1109/JETCAS.2017.2748565
State	Published - 1 Dec 2017

Keywords

60 GHz
FBMC
IEEE 802.11ad
MJFFE
MMSE
OFDM

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10.1109/JETCAS.2017.2748565

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@article{983f485e14f84cb5a768ae99e3de1972,

title = "A MMSE Joint Feedback Feed-forward Equalizer for FBMC-OQAM Baseband Receiver in the 60 GHz Band",

abstract = " In this paper, a minimum mean square error (MMSE) joint feedback feed-forward equalizer (MJFFE) is proposed to deterministically suppress the inter-symbol interference and inter-carrier interference that arose from the filter bank multi-carrier in a long multipath channel of the 60-GHz indoor wireless transmission. The decision device is discarded in the decision feedback loop to reduce error propagation while at the same time applying the MMSE criterion to prevent over compensation influenced by additive white Gaussian noise. As a result, in an non-line-of-sight (NLOS) channel with 7.65-ns rms delay spread, a 3-tap MJFFE provides 3-dB improvement at the bit error rate (BER) 10 -2 crossing and improve error floor effect at the BER 10 -3 crossing, as compared with the 1-tap zero-forcing equalizer. Furthermore, the proposed equalizer coefficients calculation based on linear convolution for the MJFFE is also presented. The hardware complexity achieves 50% reduction by using several methods including multiplexing, memory sharing, and computation element sharing. ",

keywords = "60 GHz, FBMC, IEEE 802.11ad, MJFFE, MMSE, OFDM",

author = "Liu, {Chun Yi} and Leong, {Edmund Wen Jen} and Wu, {Chang Ting} and Sie, {Meng Siou} and Henry Lopez and Chih-Wei Jen and Shyh-Jye Jou",

year = "2017",

month = dec,

day = "1",

doi = "10.1109/JETCAS.2017.2748565",

language = "American English",

volume = "7",

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AU - Liu, Chun Yi

AU - Leong, Edmund Wen Jen

AU - Wu, Chang Ting

AU - Sie, Meng Siou

AU - Lopez, Henry

AU - Jen, Chih-Wei

AU - Jou, Shyh-Jye

PY - 2017/12/1

Y1 - 2017/12/1

N2 - In this paper, a minimum mean square error (MMSE) joint feedback feed-forward equalizer (MJFFE) is proposed to deterministically suppress the inter-symbol interference and inter-carrier interference that arose from the filter bank multi-carrier in a long multipath channel of the 60-GHz indoor wireless transmission. The decision device is discarded in the decision feedback loop to reduce error propagation while at the same time applying the MMSE criterion to prevent over compensation influenced by additive white Gaussian noise. As a result, in an non-line-of-sight (NLOS) channel with 7.65-ns rms delay spread, a 3-tap MJFFE provides 3-dB improvement at the bit error rate (BER) 10 -2 crossing and improve error floor effect at the BER 10 -3 crossing, as compared with the 1-tap zero-forcing equalizer. Furthermore, the proposed equalizer coefficients calculation based on linear convolution for the MJFFE is also presented. The hardware complexity achieves 50% reduction by using several methods including multiplexing, memory sharing, and computation element sharing.

AB - In this paper, a minimum mean square error (MMSE) joint feedback feed-forward equalizer (MJFFE) is proposed to deterministically suppress the inter-symbol interference and inter-carrier interference that arose from the filter bank multi-carrier in a long multipath channel of the 60-GHz indoor wireless transmission. The decision device is discarded in the decision feedback loop to reduce error propagation while at the same time applying the MMSE criterion to prevent over compensation influenced by additive white Gaussian noise. As a result, in an non-line-of-sight (NLOS) channel with 7.65-ns rms delay spread, a 3-tap MJFFE provides 3-dB improvement at the bit error rate (BER) 10 -2 crossing and improve error floor effect at the BER 10 -3 crossing, as compared with the 1-tap zero-forcing equalizer. Furthermore, the proposed equalizer coefficients calculation based on linear convolution for the MJFFE is also presented. The hardware complexity achieves 50% reduction by using several methods including multiplexing, memory sharing, and computation element sharing.

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KW - IEEE 802.11ad

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KW - OFDM

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A MMSE Joint Feedback Feed-forward Equalizer for FBMC-OQAM Baseband Receiver in the 60 GHz Band

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