Considering the main problem of the high loss rate in wireless environments, this paper proposes a linear networking coding-aware 802.11 distributed coordination function(LEC-DCF). A double-decoding method is introduced to decode the transmitted packets. The decoding success rate of the destination node is greatly improved. It develops a Markov chain model to characterize the mathematical modeling of LEC-DCF. Analysis result shows that LEC-DCF can improve throughput in high loss rate wireless environments.