Phase shift-based pilot frequency design method in large-scale MIMO system
A pilot design, large-scale technology, applied in the field of phase-shift-based pilot design, which can solve problems such as system performance is not particularly ideal, large-scale information is considered, and phase shift is not optimal.
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[0054] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0055] The invention relates to a pilot design method based on phase shift in a massive MIMO system. The core idea of this scheme is: firstly, to establish an optimization problem with the goal of minimizing the sum of interference in the system, and then use the discrete particle swarm search algorithm to solve the optimization problem, so as to obtain the phase offset value of each cell in the system; In the second step, on the basis of the phase offset value obtained in the first step, a pilot allocation algorithm of tabu search is used to further reduce pilot pollution.
[0056] Specifically, in this preferred example, the cellular wireless communication system is taken as an example, such as figure 1 shown. The system contains L cells, each cell includes a base station placed in the ...
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