INTERFERENCE CANCELLATION IN TDD MASSIVE MIMO WIRELSS SYSTEMS

摘要

Directed inter-cell interference experienced by the downlink of a massive MIMO wireless communication network base station due to pilot contamination that occurs as a result of pilot signal reuse is significantly reduced by encoding signals to be transmitted over the downlink into robust signals. The robust signals along with corresponding beamforming vectors are transmitted over the downlink where the beamforming vectors are estimated by the base station using received fast fading pilot sequences. The encoding is performed by an interference cancellation algorithm whose use is proper when the communication network can be characterized as having one transmitter at each of its nodes (i.e., the base stations) and all the channel coefficients of the network are known by every node.