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An Adaptive Frequency Hopping Method in the Bluetooth Baseband  

Moon Sangook (목원대학교 정보전자영상공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.9, no.2, 2005 , pp. 237-241 More about this Journal
Abstract
In Bluetooth version 1.0, the frequency hopping algorithm was such that there was one piconet, using a specific frequency, resolving the frequency depending on the part of the digits of the device clock and the Bluetooth address. Basic pattern was a kind of a round-robin using 79 frequencies in the ISM band. At this point, a problem occurs if there were more than two devices using the same frequency within specific range. In this paper, we proposed a software-based adaptive frequency hopping method so that more than two wireless devices can stay connected without frequency crash. Suggested method was implemented with HDL(Hardware Description Language) and automatically synthesized and laid out. Implemented adaptive frequency hopping circuit operated well in 24MHz correctly.
Keywords
Frequency hopping; adaptive frequency hopping; wireless; HDL;
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  • Reference
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