Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems
碩士 === 國立臺灣大學 === 電信工程學研究所 === 96 === Nowadays, direct-conversion radio frequency (RF) receivers become more appealing. However, orthogonal frequency division multiplexing (OFDM) systems with direct-conversion RF receivers are very sensitive to non-idealities at the front-end of receiver, such as I/...
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ndltd-TW-096NTU054350532016-05-11T04:16:50Z http://ndltd.ncl.edu.tw/handle/59833947525108289524 Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems 寬頻通訊系統中實虛部非協調、載波頻率位移、相位雜訊與通道響應之同估測 Kai-Di Wu 吳凱迪 碩士 國立臺灣大學 電信工程學研究所 96 Nowadays, direct-conversion radio frequency (RF) receivers become more appealing. However, orthogonal frequency division multiplexing (OFDM) systems with direct-conversion RF receivers are very sensitive to non-idealities at the front-end of receiver, such as I/Q imbalance, carrier frequency offset (CFO), and phase noise (PHN). These non-idealities at the receiver result in inter-carrier interference (ICI). Accurate estimates of the non-idealities and channel response are required in OFDM systems. In this thesis, the effects of I/Q imbalance, CFO, and PHN on OFDM systems are studied, and the estimation of these parameters is considered. To solve the problems, we propose a time domain method for joint estimation of I/Q imbalance, CFO, and PHN as well as channel response. The proposed method requires only one OFDM training block as a preamble to accomplish joint estimation. Moreover, we do not put any restrictions on the preamble signal and thus the proposed method can be adopted in any communication systems with a preamble. It is shown by simulation results that our proposed method performs well for any channels as long as their order is not longer than cyclic prefix (CP). 馮世邁 2008 學位論文 ; thesis 106 en_US |
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碩士 === 國立臺灣大學 === 電信工程學研究所 === 96 === Nowadays, direct-conversion radio frequency (RF) receivers become more appealing. However, orthogonal frequency division multiplexing (OFDM) systems with direct-conversion RF receivers are very sensitive to non-idealities at the front-end of receiver, such as I/Q imbalance, carrier frequency offset (CFO), and phase noise (PHN). These non-idealities at the receiver result in inter-carrier interference (ICI). Accurate estimates of the non-idealities and channel response are required in OFDM systems. In this thesis, the effects of I/Q imbalance, CFO, and PHN on OFDM systems are studied, and the estimation of these parameters is considered. To solve the problems, we propose a time domain method for joint estimation of I/Q imbalance, CFO, and PHN as well as channel response. The proposed method requires only one OFDM training block as a preamble to accomplish joint estimation. Moreover, we do not put any restrictions on the preamble signal and thus the proposed method can be adopted in any communication systems with a preamble. It is shown by simulation results that our proposed method performs well for any channels as long as their order is not longer than cyclic prefix (CP).
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author2 |
馮世邁 |
author_facet |
馮世邁 Kai-Di Wu 吳凱迪 |
author |
Kai-Di Wu 吳凱迪 |
spellingShingle |
Kai-Di Wu 吳凱迪 Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems |
author_sort |
Kai-Di Wu |
title |
Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems |
title_short |
Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems |
title_full |
Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems |
title_fullStr |
Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems |
title_full_unstemmed |
Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems |
title_sort |
joint estimation of i/q imbalance, carrier frequency offset, phase noise, and channel response for broadband communication systems |
publishDate |
2008 |
url |
http://ndltd.ncl.edu.tw/handle/59833947525108289524 |
work_keys_str_mv |
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