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Adaptive antenna arrays for OFDM systems with cochannel interference

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2 Author(s)
Ye Li ; Dept. of Wireless Syst. Res., AT&T Labs.-Res., Red Bank, NJ, USA ; Sollenberger, N.R.

Orthogonal frequency-division multiplexing (OFDM) is one of the promising techniques for future mobile wireless data systems. For OFDM systems with cochannel interference, adaptive antenna arrays can be used for interference suppression. This paper focuses on a key issue for adaptive antenna arrays, that is, parameter estimation for the minimum mean square error (MMSE) diversity combiner (DC). Using the instantaneous correlation estimation approach developed in the paper, an original parameter estimator for the MMSE-DC is derived. Based on the original estimator, we propose an enhanced parameter estimator. Extensive computer simulation demonstrates that the MMSE-DC using the proposed parameter estimators can effectively suppress both synchronous and asynchronous interference in OFDM systems for packet and continuous data transmission

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Communications, IEEE Transactions on  (Volume:47 ,  Issue: 2 )