In this study indoor propagation has been investigated by measurement and simulation. Measurement has been done in two different indoor environments using an automated site-survey measurement system built by the author for this purpose. simulation been done using a geometrical optics based program. Rician-K Factor has been estimated using four methods in literature. Rician-K Factor has been found for time and space variation of the received signal in measurements. Rician-K factor for simulations has been found for spatial variations of the received signal. Lots of interesting conclusions are drawn in this study.