The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
OFDM(직교 주파수 분할 다중화) 시스템의 직접 변환 수신기는 DC(직류) 오프셋, 주파수 오프셋 및 IQ 불균형으로 인해 어려움을 겪습니다. 우리는 시간 영역에서 프리앰블 신호를 사용하는 DC 오프셋과 주파수 오프셋이 있는 경우 IQ 불균형 추정 기법을 제안했습니다. 이 방식에서는 DC 오프셋이 차동 필터에 의해 제거됩니다. 그러나 주파수 오프셋이 작을수록 IQ 불균형 추정의 정확도가 저하됩니다. 이 문제를 극복하기 위해 본 논문에서는 차동 필터를 사용한 주파수 영역의 새로운 IQ 불균형 추정 기법을 제안했습니다. IQ 불균형은 파일럿 부반송파를 사용하여 추정됩니다. 컴퓨터 시뮬레이션을 통해 얻은 수치 결과는 주파수 오프셋이 작아도 추정 정확도와 비트 오류율(BER) 성능을 향상시킬 수 있음을 보여줍니다.
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부
Mamiko INAMORI, Shuzo TAKAYAMA, Yukitoshi SANADA, "IQ Imbalance Estimation Scheme in the Presence of DC Offset and Frequency Offset in the Frequency Domain" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 11, pp. 2688-2696, November 2009, doi: 10.1587/transfun.E92.A.2688.
Abstract: Direct conversion receivers in orthogonal frequency division multiplexing (OFDM) systems suffer from direct current (DC) offset, frequency offset, and IQ imbalance. We have proposed an IQ imbalance estimation scheme in the presence of DC offset and frequency offset, which uses preamble signals in the time domain. In this scheme, the DC offset is eliminated by a differential filter. However, the accuracy of IQ imbalance estimation is deteriorated when the frequency offset is small. To overcome this problem, a new IQ imbalance estimation scheme in the frequency domain with the differential filter has been proposed in this paper. The IQ imbalance is estimated with pilot subcarriers. Numerical results obtained through computer simulation show that estimation accuracy and bit error rate (BER) performance can be improved even if the frequency offset is small.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.2688/_p
부
@ARTICLE{e92-a_11_2688,
author={Mamiko INAMORI, Shuzo TAKAYAMA, Yukitoshi SANADA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={IQ Imbalance Estimation Scheme in the Presence of DC Offset and Frequency Offset in the Frequency Domain},
year={2009},
volume={E92-A},
number={11},
pages={2688-2696},
abstract={Direct conversion receivers in orthogonal frequency division multiplexing (OFDM) systems suffer from direct current (DC) offset, frequency offset, and IQ imbalance. We have proposed an IQ imbalance estimation scheme in the presence of DC offset and frequency offset, which uses preamble signals in the time domain. In this scheme, the DC offset is eliminated by a differential filter. However, the accuracy of IQ imbalance estimation is deteriorated when the frequency offset is small. To overcome this problem, a new IQ imbalance estimation scheme in the frequency domain with the differential filter has been proposed in this paper. The IQ imbalance is estimated with pilot subcarriers. Numerical results obtained through computer simulation show that estimation accuracy and bit error rate (BER) performance can be improved even if the frequency offset is small.},
keywords={},
doi={10.1587/transfun.E92.A.2688},
ISSN={1745-1337},
month={November},}
부
TY - JOUR
TI - IQ Imbalance Estimation Scheme in the Presence of DC Offset and Frequency Offset in the Frequency Domain
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2688
EP - 2696
AU - Mamiko INAMORI
AU - Shuzo TAKAYAMA
AU - Yukitoshi SANADA
PY - 2009
DO - 10.1587/transfun.E92.A.2688
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2009
AB - Direct conversion receivers in orthogonal frequency division multiplexing (OFDM) systems suffer from direct current (DC) offset, frequency offset, and IQ imbalance. We have proposed an IQ imbalance estimation scheme in the presence of DC offset and frequency offset, which uses preamble signals in the time domain. In this scheme, the DC offset is eliminated by a differential filter. However, the accuracy of IQ imbalance estimation is deteriorated when the frequency offset is small. To overcome this problem, a new IQ imbalance estimation scheme in the frequency domain with the differential filter has been proposed in this paper. The IQ imbalance is estimated with pilot subcarriers. Numerical results obtained through computer simulation show that estimation accuracy and bit error rate (BER) performance can be improved even if the frequency offset is small.
ER -