Millimeter wave channel measurements and modeling for indoor femtocell applications

This paper presents the measurements, analysis and characterization of an indoor millimeter wave radio channel. The measurements have been performed in corridors, laboratory offices, as well as in residences between a fixed base station and a mobile receiver. All the provided channel parameters are supportive for a potential development of a wireless mobile system, e.g. femtocell that would operate at the millimeter wave band. The average spatial coherence of the channel was found 0.26λ. Temporal variations are induced only by the moving receiver causing a maximum Doppler spread around 400 Hz to the received signal envelope, verifying the theoretical expectations. Finally, a general model that characterizes the large and small scale nature of the millimeter wave channel is given.