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논문 기본 정보

자료유형
학술대회자료
저자정보
Yi-Jen Chiu (National Cheng Kung University) Szu-Lin Su (National Cheng Kung University) Shao-Ping Hung (National Cheng Kung University)
저널정보
대한전자공학회 ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications ITC-CSCC : 2007
발행연도
2007.7
수록면
1,400 - 1,401 (2page)

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Direct conversion receiver is widely utilized in today’s communication system. However, it usually faces a common problem of front-end distortions such as IQ imbalance and frequency offset. When treated separately, effective algorithms exist for estimating and compensating for IQ imbalance as well as frequency offset. With both effects present, such algorithms do not lead to useful estimates of the related parameters. OFDM is sensitive to nonidealities in the receiver front-end. This leads either to stringent front-end specifications and, thus, an expensive device, or large performance degradations. A good summary, Guanbin [1] discusses the transmitter calibration briefly and proposes an estimation technique for calculating the imbalance parameters. For the IEEE 802.11a OFDM standard, Tubbax observe that additional effects from OFDM channel estimation and correction can affect the IQ correction circuits and proposes a smoothing procedure to compensate. The above procedure is not effective when the CFO is too small.
This paper extends the previous results mentioned above by developing a simple and adaptive least-square (LS) algorithm to estimate and compensate for IQ imbalance assuming the IQ imbalance compensation is not affected by the CFO, then the CFO is estimated using any of several conventional algorithms. With the additional requirement of a known periodic trai ... 전체 초록 보기

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