Joint Communication and Localization in Millimeter Wave Networks

Joint communication and localization will be a key in beyond 5G networks for emerging context-aware applications such as Internet-of-Things and autonomous vehicles. In particular, millimeter wave (mmWave) networks using a massive number of antennas and large bandwidth are considered for high-rate communication and high-accuracy localization. In mmWave networks, beamforming (BF) and power allocation need to be jointly designed to simultaneously achieve high data rates and high localization accuracies. This paper proposes cooperative BF and power allocation scheme with multiple base stations to maximize the weighted sum rate of mobile stations while guaranteeing position and orientation estimation error bounds. The proposed scheme consists of two stages. In the first stage, pilot overhead is minimized while satisfying the accuracy constraints. In the second stage, the weighted sum rate for data transmission is maximized based on the estimated channel information. Numerical results show that the proposed scheme achieves a larger rate-accuracy region compared to conventional schemes.