A Channel Estimation Algorithm for OFDM Based on Frequency Domain Windowing

Tang Tian; Zhang Zhi; Zhang Ping

doi:10.3724/SP.J.1146.2006.00709

Volume 29 Issue 12

Jan. 2011

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Article Navigation > Journal of Electronics & Information Technology > 2007 > 29(12): 2930-2933

Tang Tian, Zhang Zhi, Zhang Ping. A Channel Estimation Algorithm for OFDM Based on Frequency Domain Windowing[J]. Journal of Electronics & Information Technology, 2007, 29(12): 2930-2933. doi: 10.3724/SP.J.1146.2006.00709

Citation:

Tang Tian, Zhang Zhi, Zhang Ping. A Channel Estimation Algorithm for OFDM Based on Frequency Domain Windowing[J]. Journal of Electronics & Information Technology, 2007, 29(12): 2930-2933. doi: 10.3724/SP.J.1146.2006.00709

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A Channel Estimation Algorithm for OFDM Based on Frequency Domain Windowing

doi: 10.3724/SP.J.1146.2006.00709

Received Date: 2006-05-24
Rev Recd Date: 2006-10-08
Publish Date: 2007-12-19

Abstract

Abstract

The leakage of Channel Impulse Response (CIR) in the time domain channel estimation for the practical OFDM systems is analyzed. A novel channel estimation algorithm in the time domain is proposed for OFDM. The frequency domain windowing is used to reduce the leakage of CIR. The noise of CIR is direct cut according to a threshold. Comparison has been done between the proposed algorithm and the existing time domain channel estimation algorithms in the non-sample-spaced multipath fading channel. Simulation results show the decreasing of channel estimation MSE and the improvement of BER performance by the proposed algorithm.

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References(1)

References

[1] Zhao Yuping and Huang Aiping. A novel channel estimation method for OFDM mobile communication system based on pilot signals and transform domain processing. IEEE 47th VTC, Phoenix, 1997, Vol.3: 2089-2093. [2] Minn H and Bhargava V K. An investigation into time-domain approach for OFDM channel estimation[J].IEEE Trans. on Broadcasting.2000, 46(4):240-248 [3] Fukuhara H, Hao Yuan, and Takeuchi Y, et al.. A novel channel estimation method for OFDM transmission technique under fast time-variant fading channel. IEEE 57th VTC, Jeju, 2003, Vol.4: 2343-2347. [4] Pei Yun Tsai and Tzi Dar Chiueh. Frequency-domain interpolation-based channel estimation in pilot-aided OFDM systems. IEEE 59th VTC, Milan, 2004, Vol.1: 420-424. [5] Van de Beek J J, Edfors O, and Sandell M, et al.. On channel estimation in OFDM systems. IEEE 45th VTC, Chicago, 1995, Vol.2: 815-819. [6] Yang Baoguo, Cao Zhigang, and Letaief K B. Analysis of low-complexity windowed DFT-based MMSE channel estimator for OFDM systems[J].IEEE Trans. on Communications.2001, 49(11):1977-1987

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