Real-Time mmWave Channel Sounding Through Switched Beamforming With 3-D Dual-Polarized Phased-Array Antennas

We propose a 28.5-GHz channel sounder that switches through all antennas of multiple dual-polarized $8 \times 8$ phased arrays at the transmitter and receiver and performs beamforming in postprocessing through digital weights to synthesize a sweepable beam. To our knowledge, we are the first to implement—what we refer to as—<...