A low power divider for high frequency FMCW based localization systems

Indoor local positioning systems have become very popular in recent years. Similar to the evolution of wireless communication systems, the variety, functionality and performance of indoor localization systems are increasing. A wide field of usability like in medical, industrial, logistics and transportation systems is possible. Localization data not only allows diverse applications, but also requires highly accurate and energy efficient localization systems with low costs and a highly integrated structure. In this context, FMCW (frequency modulated continuous wave) radar enables spectral efficient and accurate positioning together with basic communication schemes like frequency shift keying [1], [2]. Although high performance is a key element, small sizes and low power consumption of the systems are appreciated more often due to the flexibility of small battery operating localization modules. To reach this power efficiency new system structures for the localization system are necessary. For speed improvement as well as size and power consumption reduction a combined divider structure of CMOS and TSPC (true single phase clock) logic is shown in this paper.