A Covariance-based User Activity Detection and Channel Estimation Approach with Novel Pilot Design
A Covariance-based User Activity Detection and Channel Estimation Approach with Novel Pilot Design
This paper studies the massive machine-type communications (mMTC) for the future Internet of Things (IoT) applications. Building upon the fact that the covariance matrix of the received signal can be accurately estimated in the spatial domain if the base station (BS) is equipped with a massive number of antennas, we …