| الملخص: | In the practical application of multi-cell multi-user massive MIMO systems,a large number of users are randomly allocated to the same sector,resulting in a decline in user communication quality or even a failure in reliable communication.To address the problem,this paper proposes a pilot allocation method based on user location information.The method takes the angle difference between users reaching the base station and the distance difference between users as a basis for allocation,and designs an interference metric function to reasonably guide the dynamic pilot allocation of all users in the cell,thereby reducing user interference within the sector.Simulation results show that compared with the full orthogonal and full multiplexing pilot allocation methods,the proposed method significantly improves the average Signal to Interference Noise Ratio(SINR) of users when the number of antennas is small.It can still maintain good overall system performance when the number of antennas increases.Also,it improves the number of user connections and ensures reliable simultaneous communication between a large number of users in the same sector.
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