Channel Prediction based Adaptive Channel Tracking cheme in MIMO-OFDM Systems with Null Sub-carriers 


Vol. 32,  No. 5, pp. 556-564, May  2007


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  Abstract

This paper proposes an efficient scheme to track a time variant channel induced by multi-path Rayleigh fading in mobile MIMO-OFDM systems with null sub-carriers. The proposed adaptive channel tracking scheme removes in the frequency domain the interfering signals of the other transmit (Tx) antennas by using a predicted channel frequency response before starting the channel estimation. Time domain channel estimation is then performed to reduce the additive white Gaussian noise (AWGN). The simulation results show that the proposed method is better than the conventional channel tracking method [3] in time varying channel environments. At a Doppler frequency of 300 ㎐ and bit error rates (BER) of 10-3, signal-to-noise power ratio (Eb/N0) gains of about 2.5 ㏈ are achieved relative to the conventional channel tracking method [3]. At a Doppler frequency of 600 ㎐, the performance difference between the proposed method and conventional one becomes much larger.

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  Cite this article

[IEEE Style]

H. Jeon, "Channel Prediction based Adaptive Channel Tracking cheme in MIMO-OFDM Systems with Null Sub-carriers," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 5, pp. 556-564, 2007. DOI: .

[ACM Style]

Hyoung-Goo Jeon. 2007. Channel Prediction based Adaptive Channel Tracking cheme in MIMO-OFDM Systems with Null Sub-carriers. The Journal of Korean Institute of Communications and Information Sciences, 32, 5, (2007), 556-564. DOI: .

[KICS Style]

Hyoung-Goo Jeon, "Channel Prediction based Adaptive Channel Tracking cheme in MIMO-OFDM Systems with Null Sub-carriers," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 5, pp. 556-564, 5. 2007.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880