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학술대회
Cancellation of ICI by Doppler Effect in OFDM Systems
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- 발행일
- 200605
- 출처
- Vehicular Technology Conference (VTC) 2006 (Spring), pp.1411-1415
- 협약과제
- 05MM1100, 4세대 이동통신 기술개발, 황승구
- 초록
- This paper observes the inter-carrier interference (ICI) by Doppler effect in time domain in orthogonal frequency division multiplexing systems. This observation allows us to propose a new time domain two-stage equalization scheme that iteratively cancels the ICI. The proposed scheme consists of the following two stages: First, we apply low-complexity linear minimum mean squared error (MMSE) employing partial rank of time impulse response matrix to shorten the ICI components into diagonal region. Second, we propose new parallel interference cancellation with hard decision feedback to remove the residual ICI. Performance evaluations and complexity analyses show that the bit error rate and the signal-to-interference-plus-noise ratio performances of the proposed scheme are very close to those of the classical frequency domain linear MMSE equalization scheme with much reduced complexity. © 2006 IEEE.
- KSP 제안 키워드
- Bit Error Rate(And BER), Complexity analyses, Decision feedback, Inter-carrier interference, Linear minimum mean squared error, MMSE equalization, Minimum Mean Square Error(MMSE), OFDM systems, Orthogonal frequency division Multiplexing(OFDM), Performance evaluation, Reduced complexity