An Indoor mmWave Joint Radar and Communication System with Active Channel Perception

As a promising candidate for future 5G and beyond, millimeter-wave (mmWave) has received considerable attention. However, mmWave channel estimation remains to be a challenging problem. To tackle this issue, this paper proposes a mmWave joint radar and communication system for indoor scenarios. By cooperating with mmWave radar, the propagation environment is perceived. Then, high-accuracy channel estimates are obtained, which helps in designing more accurate precoders and combiners. Compared with the conventional channel estimation methods, the proposed scheme significantly reduces the spectrum overhead and computational complexity, especially when massive antennas and multiple users are involved. Our results may shed some lights on the system design for future mmWave communications.