Measurement Method of High Time-Resolution Power Delay Profile Using In-Band and Out-of-Band Spectrums Under Local 5G System Operation

A measurement method of Power Delay Profile (PDP) using both in-band and out-of-band spectrums for high time-resolution under system operation is proposed for local 5G in this paper. We have proposed the PDP passive measurement method using a receiver antenna for reference near a transmitter equipment under system operation without using any special transmitting (Tx) signal. In this former method, no special Tx signal is necessary. However, there is one disadvantage of limited time-resolution decided by system bandwidth in the former method. We propose one approach using both in-band and out-of-band spectrums for high time-resolution in this paper. An availability of this method is confirmed by a simulation at first. We have also applied this method to PDP measurement for bandwidth-limited RU (Radio Unit) of local 5G system in German factory. Finally, we can confirm an availability of this proposed method.