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SVD-Based Techniques for Zero-Padded Block Transmission Over Fading Channels

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2 Author(s)
Bianchi, T. ; Dept. of Electron. & Telecommun., Univ. of Florence ; Argenti, F.

In this paper, the performance of filter bank transceivers in the presence of a dispersive time-variant channel is investigated. It is well known that filter bank transceivers can be adapted to the channel transfer function to yield intersymbol interference (ISI) cancellation. When the channel is time variant, several problems arise, since the transceiver should be changed whenever the channel evolves. In this paper, we will allow both the transmitter and the receiver to change and satisfy the interference-free condition, under the assumption of a zero-padded block transmission. In this case, the optimum transmitter-receiver pair can be computed by using a singular value decomposition (SVD) of the channel matrix. A fast receiver adaptation based on SVD tracking is presented. Simulation results show that minimum performance loss with respect to the optimum receiver can be achieved for our reduced complexity receiver

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Signal Processing, IEEE Transactions on  (Volume:55 ,  Issue: 2 )