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A transmit MIMO scheme with frequency domain pre-equalization for wireless frequency selective channels

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2 Author(s)
Lai-U Choi ; Dept. of Electr. & Eng., Hong Kong Univ. of Sci. & Technol., China ; Murch, R.D.

In this paper, we introduce a transmit multiple-input multiple-output (MIMO) scheme with frequency domain pre-equalization for a multipath or frequency selective channel. In this scheme, MIMO processing in the frequency domain is performed at the transmitter or base station so that the receiver or mobile station only requires limited processing. This scheme provides high data rates and also inherits from the frequency domain equalization the property of relatively low complexity in severe multipath environments. The MIMO transmit processing is derived by minimizing the minimum mean square errors (MMSE), and expressions for the signal-to-interference-plus-noise ratio and error probability based on the Gaussian approximation of the interference term are provided. Some important associated issues, such as channel errors and computational complexity, are also investigated. Numerical simulations are also provided and these demonstrate the improved performance of our proposed scheme compared to other transmit MIMO schemes. In particular, they show that the proposed system can attain multipath or frequency diversity of the channel.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:3 ,  Issue: 3 )

Date of Publication:

May 2004

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