A New Coupling Channel Estimator for Cross-Talk Cancellation at Wireless Relay Stations

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In this paper, the authors are concerned with cross-talk interference from the transmit to the receive antenna of a wireless Channel-Reuse-Relay-Station (CRRS) that forwards signals over the same channel as it receives signals. By estimating the coupling channel from the transmit to the receive antenna, the proposed scheme performs cross-talk reconstruction and cancellation at the RS. Different from the conventional coupling channel estimation schemes that require the RS to transmit dedicated pilots, the proposed scheme utilizes the random forwarded signals of the RS as pilots for coupling channel estimation, thus avoiding changing the structure of the RS's transmitted signal.