DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Yong-Hoon | - |
dc.contributor.advisor | 이용훈 | - |
dc.contributor.author | Sohn, Il-Hyun | - |
dc.contributor.author | 손일현 | - |
dc.date.accessioned | 2011-12-14 | - |
dc.date.available | 2011-12-14 | - |
dc.date.issued | 2003 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=181165&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/35152 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 전기및전자공학전공, 2003.2, [ ix, 86 p. ] | - |
dc.description.abstract | This thesis investigates digital signal processing (DSP) techniques for compensating both the I/Q mismatch and the DC offset in communication receivers. First, a data-aided adaptive I/Q mismatch and DC offset compensation method is developed in frequency-selective channel environments. This method is derived by extending the existing compensation technique, which is derived in AWGN environment, to frequency-selective channels. The method compensates for not only the I/Q mismatch and the DC offset but also the inter-symbol-interference (ISI). The optimal filter tap coefficients are analyzed in a mean-square error (MSE) criterion. After evaluating theoretical performance of the compensation method, a filter tap coefficient initialization scheme is developed using the recursive least-squares (RLS) algorithm. In the second part, a new I/Q mismatch and DC offset compensation method is proposed. In this method, the I/Q mismatch and the DC offset are estimated using the least-squares (LS) method with the aid of a training sequence. The I/Q mismatch and the DC offset are eliminated using the estimates. In addition, a group of training sequences that minimizes the MSE of the estimate is determined. Since this compensation scheme is based on an estimation technique, it requires a shorter training sequence than the above compensation method which is based on an adaptive filtering technique. The advantages of proposed method are demonstrated through computer simulations. Finally, the proposed I/Q mismatch and DC offset estimation method is extended to time-varying channel environments. To extend the estimation method to fast fading channels, polynomial time-varying channel model is employed. Through computer simulations, it is shown that the estimation method exhibits robust performance in fast fading channel environments. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | I/Q mismatch | - |
dc.subject | DC offset | - |
dc.subject | DC 옵셋 | - |
dc.subject | I/Q 불균형 | - |
dc.title | I/Q mismatch and DC offset compensation in communication receivers | - |
dc.title.alternative | 통신 수신기의 I/Q 불균형과 DC 옵셋 보상 방법 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 181165/325007 | - |
dc.description.department | 한국과학기술원 : 전기및전자공학전공, | - |
dc.identifier.uid | 000985180 | - |
dc.contributor.localauthor | Lee, Yong-Hoon | - |
dc.contributor.localauthor | 이용훈 | - |
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