Temporal Cognitive UWB Medium Access in the Presence of Multiple Strong Signal Interferers


Thomas Zasowski, Frank Althaus, and Armin Wittneben


14th IST Mobile & Wireless Communications Summit, Dresden, Germany, June 2005.

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To enable reliable transmission, UWB receivers have to cope with interference from several existing wireless services. Based on spectrum analyzer measurements we will show that stationary or quasi-stationary noise can be handled using a high pass filter. For a narrowband interferer (NBI) in close vicinity such a filtering is not sufficient since the receiver may be clipping. This can happen especially in wireless body area networks (BAN) where a number of different NBIs are placed in close vicinity to the UWB receiver. Since most NBI transmit their data burst-wise, as, e.g., GSM or Bluetooth (BT), we propose UWB transmission between adjacent interferer bursts to avoid the UWB receiver's clipping. Based on extensive time domain measurements where GSM, BT and IEEE 802.11b WLAN are all active at the same time, it will be shown that reasonable data rates can be achieved and that strict latency time requirements can be met with such a temporal cognitive medium access.


UWB, Medium Access, Interference avoidance

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Copyright Notice: © 2005 T. Zasowski, F. Althaus, and A. Wittneben.

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