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Title:
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Frequency-Domain ICI Estimation, Shortening, and Cancellation in OFDM Receivers |
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Author:
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Sestok, Charles K.; Radosavljevic, Predrag
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Type:
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Conference Paper |
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Keywords:
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OFDM; equalization; inter-carrier interference; ICI; windowing; channel shortening |
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Citation:
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C. K. Sestok and P. Radosavljevic,"Frequency-Domain ICI Estimation, Shortening, and Cancellation in OFDM Receivers," in IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, |
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Abstract:
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Orthogonal frequency division multiplexing (OFDM) communication systems encounter performance limitations due to time-varying channels common in wireless applications. The channel variations introduce inter-carrier interference (ICI) in the received signal. To compensate, groups of adjacent OFDM carriers can be processed to cancel the interference. This paper considers a two-stage ICI cancellation technique. In the first stage, linear preprocessing compresses the effective ICI response. The second stage generates an MMSE estimate of the transmitted data. Simulation results for a DVB-T receiver using this technique show that frequency domain ICI response shortening performs best when combined with the receiver channel estimator. |
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Date Published:
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2006-04-01 |
