Performance evaluation of a Bluetooth channel estimation algorithm

Since Bluetooth devices have to share the already crowded unlicensed ISM band with WLAN spread spectrum devices that may be operating in close proximity, a mechanism that detects interference and avoids transmission in the so-called ´bad´ channels is key in order to prevent mutual interference and the resulting performance degradation. We describe a dynamic channel estimation algorithm and evaluate its performance in conjunction with a Bluetooth scheduling algorithm that avoids transmission in frequencies used by other devices. Simulation results for several scenarios of interest including different traffic types are presented and analyzed.