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ISI-Free Block Transceivers for Unknown Frequency Selective Channels

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3 Author(s)
Chih-Hao Liu ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei ; See-May Phoong ; Yuan-Pei Lin

The orthogonal frequency-division multiplexing (OFDM) transceiver has enjoyed great success in many wideband communication systems. It has low complexity and robustness against channel-induced intersymbol interference (ISI). When the channel order does not exceed the length of cyclic prefix, any frequency-selective channel is converted to a set of frequency-nonselective subchannels. This channel-independent ISI-free property is useful for many applications. In this correspondence, we study general block transceiver with such a property. We will show that the solutions of channel-independent ISI-free block transceivers are given in a closed form. It is found that except for some special cases, the solutions are identical to the Lagrange-Vandermonde and Vandermonde-Lagrange transceivers

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Signal Processing, IEEE Transactions on  (Volume:55 ,  Issue: 4 )