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The UWB (ultra wide band) technology can play an effective role in the fieldbus control system. It can offer extra facilities not offered by current available techniques in industrial environments. The aimed advances of UWB are that high data rates, low power consumption, precise ranging capabilities, resistance to multi-path fading, and penetration of dense objects. But, owing to a lot of short packets...
Fading is one of the common characters of a wireless channel. Many rate adaptation mechanisms were proposed to enhance the IEEE 802.11 systems, but these may cause multiple rates in a single network. However, IEEE 802.11 DCF faces the performance anomaly in multi-rate network, that is, when the stations with different rates collide, the low-rate station will greatly degrade the high-rate station....
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