BlueHound: An Integrated Bluetooth And GPS Radio

Michael McCullagh

Abstract:	With the increasing use of mobile communications devices has come a requirement in the US for the location of 911 calls to within 150m, the so-called E911 requirement. Similarly, the difficulty of cabling buildings for LAN infrastructure in constantly changing business environments has meant that wireless LAN standards such as 802.11 and HomeRF have become attractive options for networking. Finally, the number of personal communications and computing devices that users carry with them is increasing and has led to the development of PANs (Personal Area Networks) such as 802.15 and Bluetooth. The creation of a compact, low-cost wireless communications and computing device requires that some or all of the aforementioned wireless communications technologies must be integrated into a single device. A dual mode radio architecture is proposed that shares a large part of the same receiver strip for both Bluetooth and GPS. The design minimises silicon area and hence cost by reusing a large number of the radio blocks for both GPS and Bluetooth modes. This includes a shared synthesizer featuring frequency switching between Bluetooth and GPS using regenerative division. This single chip design results in a significant reduction of silicon area and hence cost when compared with the conventional separate radio solution as well as the additional benefit of the reduction in standby current.
Published in:	Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001) September 11 - 14, 2001 Salt Palace Convention Center Salt Lake City, UT
Pages:	2828 - 2837
Cite this article:	McCullagh, Michael, "BlueHound: An Integrated Bluetooth And GPS Radio," Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 2828-2837.
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