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We examine the impact of physical layer rate adaptation mechanisms on the performance of real applications over 802.11 wireless links in diverse channel environments. Our evaluations are based on a testbed with real wireless devices equipped with commodity 802.11 hardware and a hardware channel emulator. We consider two different and well-known 802.11 rate adaptation mechanisms (Onoe and SampleRate) and study their performance under several realistic workloads, including multimedia streamingdoi:10.1109/wcnc.2006.1696649 dblp:conf/wcnc/YangMB06 fatcat:4vij5ka6k5bnjlmok7goztadmu