LARGE-SCALE MIMO WIRELESS COMMUNICATION METHOD BASED ON PILOT MULTIPLEXING

摘要

The present invention provides a large-scale MIMO wireless communication method based on pilot multiplexing. A large-scale antenna array is configured on a base station side, and a base station wirelessly communicates with multiple users on a same time-frequency resource. Pilot signals used by the different users that communicate with the base station on the same time-frequency resource are not required to be completely orthogonal, same pilot can be multiplexed between the different users, and the length of the pilot signals and the number of pilots can be smaller than the number of the users that communicate on the same time-frequency resource. The users send mutually-orthogonal detection signals, and the base station acquires statistic channel information of the users according to the received detection signals, and distributes pilot signals to dispatched users. The dispatched users send the respective distributed pilot signals, and the base station side performs uplink robust reception and downlink robust precoding transmission according to the statistic characteristics of channel estimated values and channel estimated errors. The present invention can reduce the pilot cost of a system, and improve the spectrum efficiency and the power efficiency of a wireless communications system.