Development of multipath measurement and simulation equipment for wideband mobile radio

Equipment which has the capabilities of multipath measurement and also for wideband (16 MHz) digital simulation of a land mobile radio channel is described. Since the equipment has the capability for reproducing measured multipath, the authors propose to use measured data (successive impulse response sequences) to make a standard propagation model. This can then be used as an alternative to the conventional simplified model for developing and evaluating radio equipment operating in the land mobile multipath environment. In the multipath measurement mode, the equipment has the capability to store signals from multiple receiving antennas. One can use three-dimensional antenna array on vertical and horizontal polarizations simultaneously. Consequently, one can measure arbitrary incoming path directions. This capability is useful for developing and evaluating adaptive arrays and space diversity antennas as countermeasures to channel distortion in the multipath propagation environment