| 摘要 |
A method of channel estimation in an OFDM transmission system having a transmitter and a receiver according to standard IEEE 802.11x, comprising, in the transmitter, setting an identifier in the reserved bits section of the header following the preamble in a physical layer frame, attaching a postamble at the end of said frame without altering the length information in the header, and transmitting said frame over the channel; and in the receiver, checking said reserved bits section in the header of a frame received over the channel for said identifier and, if said identifier is detected, using the postamble and the preamble of the frame to estimate the channel.
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