Provided by: Cornell University
Corrupted frames with CRC errors potentially provide a useful channel through which information can be transmitted. Using measurements taken in an outdoor environment, it is demonstrated that for 802.11 wireless links the channel provided by corrupted frames alone (i.e. ignoring frames with PHY errors and frames received correctly) can be accurately modeled as a Binary Symmetric Channel (BSC) provided appropriate pre- and post-processing is carried out. Also, the channel provided by corrupted frames and other frames combined can be accurately modeled as a hybrid binary-symmetric/packet-erasure channel.