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Conference Paper
Cancellation of ICI by Doppler Effect in OFDM Systems
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- Authors
- Kap Seok Chang, Young Nam Han, Jeong Seok Ha, Young Hoon Kim
- Issue Date
- 2006-05
- Citation
- Vehicular Technology Conference (VTC) 2006 (Spring), pp.1411-1415
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- 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 Keywords
- Bit Error rate, Complexity analyses, Decision feedback, Equalization scheme, Frequency domain(FD), Inter-carrier Interference, Linear MMSE, Linear minimum mean squared error, Low complexity, MMSE equalization, Minimum Mean Square Error(MMSE)