CHANNEL SIMULATOR FOR MOBILE SYSTEMS

摘要

The invention relates to a device and a method at a mobile communications system which makes possible a flexible and realistic way of emulating the time dispersive qualities and the broadband frequency correlation qualities of one in said system included radio channel. The invention includes two or more flexible delay modules (B), where each module is arranged to emulate a tap and a continuously varying tap attenuation can be attained to describe the variation of the radio channel over the time. The modules (B) are realized in SAW-technology, and continuously varying tap attenuation is achieved by means of utilization of PIN-diode attenuators (H).