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| Doubly Selective Fading Channel Estimation Based on Polynomial
Interpolation in MIMO Systems |
| Yu Xiao-yan; Wang Jia-qing; Yang Lü-xi |
| Department of Radio Engineering, Southeast University, Nanjing 210096, China |
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Abstract High data transmission rates and high mobility give rise to time selectivity and frequency selectivity in wireless communication channels. This paper investigates Multi-Input Multi-Output (MIMO) time and frequency doubly selective channel estimation using polynomial interpolation method for data block transmissions. Firstly, a polynomial interpolation model is introduced to represent doubly selective MIMO channel; then, relying on channel Doppler fading rate and the polynomial error term, the polynomial model order and the length of the whole data block are obtained; Finally, based on polynomial interpolation channel model, MIMO doubly selective channels are estimated using pilot symbol assisted modulation. Simulation results show that the proposed estimation method has effective performance.
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Received: 06 September 2004
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2006, Vol. 28 
