| 摘要 |
A method comprising wirelessly transmitting, by a base station in a multi-hop network, a preamble series to be received by a subscriber station in the network, wirelessly transmitting, by the base station, a reverse version of the preamble series to be received by a relay station in the network, receiving, by the relay station, the transmitted reverse version of preamble series, and receiving, by the subscriber station, the transmitted preamble series.
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