Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems

Terng-Yin Hsu; Wei Chi Lai; Tsung Yeh He

doi:10.1109/SCET.2012.6342153

Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems

Terng-Yin Hsu^*, Wei Chi Lai, Tsung Yeh He

^*Corresponding author for this work

Department of Computer Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Radio frequency (RF) imperfections, such as DC offset, frequency offset and I/Q imbalance, are important issues in wireless broadband systems. In this paper, preamble-aided estimation and compensation of I/Q imbalance with filter mismatch are proposed to enhance signal quality and link reliability for 2x2 MIMO-OFDM systems. The proposed preamble-aided estimation is able to detect filter, gain and phase mismatches by using the cross-ratio property of preambles. Then the estimated result is programmed to correct this distortion. Through simulations in frequency-selective fading, they hint that this solution can solve I/Q imbalance with 2 dB gain error, 20° phase error and 180° filter mismatch.

Original language	English
Title of host publication	2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings
DOIs	https://doi.org/10.1109/SCET.2012.6342153
State	Published - 12 Dec 2012
Event	2012 Spring World Congress on Engineering and Technology, SCET 2012 - Xi'an, China Duration: 27 May 2012 → 30 May 2012

Publication series

Name	2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings

Conference

Conference	2012 Spring World Congress on Engineering and Technology, SCET 2012
Country/Territory	China
City	Xi'an
Period	27/05/12 → 30/05/12

Keywords

Filter mismatch
Frequency dependent imbalance (FDI)
I/Q imbalance
MIMO OFDM

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10.1109/SCET.2012.6342153

Cite this

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title = "Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems",

abstract = "Radio frequency (RF) imperfections, such as DC offset, frequency offset and I/Q imbalance, are important issues in wireless broadband systems. In this paper, preamble-aided estimation and compensation of I/Q imbalance with filter mismatch are proposed to enhance signal quality and link reliability for 2x2 MIMO-OFDM systems. The proposed preamble-aided estimation is able to detect filter, gain and phase mismatches by using the cross-ratio property of preambles. Then the estimated result is programmed to correct this distortion. Through simulations in frequency-selective fading, they hint that this solution can solve I/Q imbalance with 2 dB gain error, 20° phase error and 180° filter mismatch.",

keywords = "Filter mismatch, Frequency dependent imbalance (FDI), I/Q imbalance, MIMO OFDM",

author = "Terng-Yin Hsu and Lai, {Wei Chi} and He, {Tsung Yeh}",

year = "2012",

month = dec,

day = "12",

doi = "10.1109/SCET.2012.6342153",

language = "English",

isbn = "9781457719646",

series = "2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings",

booktitle = "2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings",

note = "2012 Spring World Congress on Engineering and Technology, SCET 2012 ; Conference date: 27-05-2012 Through 30-05-2012",

}

Hsu, T-Y, Lai, WC & He, TY 2012, Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems. in 2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings., 6342153, 2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings, 2012 Spring World Congress on Engineering and Technology, SCET 2012, Xi'an, China, 27/05/12. https://doi.org/10.1109/SCET.2012.6342153

Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems. / Hsu, Terng-Yin; Lai, Wei Chi; He, Tsung Yeh.
2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings. 2012. 6342153 (2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems

AU - Hsu, Terng-Yin

AU - Lai, Wei Chi

AU - He, Tsung Yeh

PY - 2012/12/12

Y1 - 2012/12/12

N2 - Radio frequency (RF) imperfections, such as DC offset, frequency offset and I/Q imbalance, are important issues in wireless broadband systems. In this paper, preamble-aided estimation and compensation of I/Q imbalance with filter mismatch are proposed to enhance signal quality and link reliability for 2x2 MIMO-OFDM systems. The proposed preamble-aided estimation is able to detect filter, gain and phase mismatches by using the cross-ratio property of preambles. Then the estimated result is programmed to correct this distortion. Through simulations in frequency-selective fading, they hint that this solution can solve I/Q imbalance with 2 dB gain error, 20° phase error and 180° filter mismatch.

AB - Radio frequency (RF) imperfections, such as DC offset, frequency offset and I/Q imbalance, are important issues in wireless broadband systems. In this paper, preamble-aided estimation and compensation of I/Q imbalance with filter mismatch are proposed to enhance signal quality and link reliability for 2x2 MIMO-OFDM systems. The proposed preamble-aided estimation is able to detect filter, gain and phase mismatches by using the cross-ratio property of preambles. Then the estimated result is programmed to correct this distortion. Through simulations in frequency-selective fading, they hint that this solution can solve I/Q imbalance with 2 dB gain error, 20° phase error and 180° filter mismatch.

KW - Filter mismatch

KW - Frequency dependent imbalance (FDI)

KW - I/Q imbalance

KW - MIMO OFDM

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T3 - 2012 Spring World Congress on Engineering and Technology, SCET 2012 - Proceedings

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Y2 - 27 May 2012 through 30 May 2012

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Frequency-dependent I/Q Imbalance compensator for 2x2 MIMO-OFDM systems

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Keywords

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