Pilot frequency sequence distribution method and pilot frequency sequence distribution device based on massive multiple-input multiple-output system

Abstract

An embodiment of the invention provides a pilot frequency sequence distribution method and a pilot frequency sequence distribution device based on a massive multiple-input multiple-output system. The method specifically includes: within a set time interval, aiming at every terminal user, judging whether the terminal user belongs to an edge user or not according to an acquired large-scale fading factor value of every terminal user; if yes, selecting a pilot frequency sequence from a first set and distributing the selected pilot frequency sequence to every terminal user; otherwise, selecting a pilot frequency sequence from a second set to serve as an initial pilot frequency sequence, obtaining a target pilot frequency sequence according to the initial pilot frequency sequence and a stored linear phase shift factor, and distributing the target pilot frequency sequence to the terminal user, wherein pilot frequency sequences in the first set are different from pilot frequency sequences in the second set, the pilot frequency sequences, stored in first cells, in the first set are different, and linear phase shift factors stored in the first cells are different. By the pilot frequency sequence distribution method and the pilot frequency sequence distribution device based on the massive multiple-input multiple-output system, pilot frequency pollution among the cells can be reduced.

Description

technical field [0001] The present invention relates to the technical field of pilot frequency processing, in particular to a pilot sequence allocation method and device based on a large-scale multiple-input multiple-output system. Background technique [0002] A massive multiple-input multiple-output system (Multiple-Input Multiple-Output, MIMO) includes multiple base stations, each base station serves a cell, and each cell has multiple terminal users. Each terminal user is configured with a single antenna, each base station is configured with a large number of antennas, and each base station serves multiple single-antenna terminal users in a corresponding cell at the same time. [0003] In a communication system, when performing uplink channel estimation, a terminal user in each cell sends a pilot sequence to the base station of the cell, and the base station estimates the uplink channel according to the received pilot signal. The pilot sequence for each end user of each ...

AI Technical Summary

Problems solved by technology

In this way, although the interference between pilot sequences of edge users can be reduced, the pilot sequences between central users of different cells are still multiplexed, and pilot pollution still exists.

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