On channel estimation for OFDM/TDM Using MMSE-FDE in a fast fading channel

Haris Gacanin; Fumiyuki Adachi

doi:10.1155/2009/481214

On channel estimation for OFDM/TDM Using MMSE-FDE in a fast fading channel

Haris Gacanin, Fumiyuki Adachi

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

MMSE-FDE can improve the transmission performance of OFDM combined with time division multiplexing (OFDM/TDM), but knowledge of the channel state information and the noise variance is required to compute the MMSE weight. In this paper, a performance evaluation of OFDM/TDM using MMSE-FDE with pilot-assisted channel estimation over a fast fading channel is presented. To improve the tracking ability against fast fading a robust pilot-assisted channel estimation is presented that uses time-domain filtering on a slot-by-slot basis and frequency-domain interpolation. We derive the mean square error (MSE) of the channel estimator and then discuss a tradeoff between improving the tracking ability against fading and the noise reduction. The achievable bit error rate (BER) performance is evaluated by computer simulation and compared with conventional OFDM. It is shown that the OFDM/TDM using MMSE-FDE achieves a lower BER and a better tracking ability against fast fading in comparison with conventional OFDM.

Original language	English
Article number	481214
Journal	Eurasip Journal on Wireless Communications and Networking
Volume	2009
DOIs	https://doi.org/10.1155/2009/481214
Publication status	Published - 2009

ASJC Scopus subject areas

Signal Processing
Computer Science Applications
Computer Networks and Communications

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10.1155/2009/481214

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abstract = "MMSE-FDE can improve the transmission performance of OFDM combined with time division multiplexing (OFDM/TDM), but knowledge of the channel state information and the noise variance is required to compute the MMSE weight. In this paper, a performance evaluation of OFDM/TDM using MMSE-FDE with pilot-assisted channel estimation over a fast fading channel is presented. To improve the tracking ability against fast fading a robust pilot-assisted channel estimation is presented that uses time-domain filtering on a slot-by-slot basis and frequency-domain interpolation. We derive the mean square error (MSE) of the channel estimator and then discuss a tradeoff between improving the tracking ability against fading and the noise reduction. The achievable bit error rate (BER) performance is evaluated by computer simulation and compared with conventional OFDM. It is shown that the OFDM/TDM using MMSE-FDE achieves a lower BER and a better tracking ability against fast fading in comparison with conventional OFDM.",

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On channel estimation for OFDM/TDM Using MMSE-FDE in a fast fading channel

Abstract

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