Vectorial channel sounding of MISO propagation channels without synchronization

In this contribution a vectorial channel sounder with multiple transmitting antennas and one receiving antenna is presented. This channel sounder characterizes time variant propagation channels providing a measure of how wave propagation deviates from ideal free space propagation. In particular, it quantifies additional amplitude modulation characteristics in a multipath environment as well as a frequency modulation due to moving scatterers in the propagation path. Moreover, this vectorial channel sounder distinguishes properties of a propagation that depend on emitting antennas with different characteristics, such as polarization, location and emitting directions. This paper focusses on coding and detection algorithms of individual timing schemes applied to emitting antennas allowing a vectorial channel sounding without any synchronization. A reduction of the required sample rate is achieved by a down conversion of the channel´s RF to an intermediate frequency. A typical application is the measurement of narrowband multipath propagation channels of navigation systems. As an example a multipath environment with a miniaturized rotating wind turbine is measured.