Pilot frequency distribution method and device
A pilot allocation and population technology, which is applied in pilot signal allocation, allocation standards, transmission path sub-channel allocation, etc., can solve the problems of limited number of orthogonal pilot sequences, MIMO system pilot pollution, interference, etc.
Pending Publication Date: 2022-05-31
베이징에스윈컴퓨팅테크놀로지씨오엘티디
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Problems solved by technology
Due to the shortage of time-frequency resources, the number of available orthogonal pilot sequences is limited, and the user terminals in each cell in a large-scale antenna system reuse pilot sequences, which inevitably leads to channel estimation results being affected by the same Interference of pilot sequence user terminals, causing pilot pollution in massive MIMO systems
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[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0026] Such as figure 1 As shown, the embodiment of the present invention provides a pilot allocation method, the method mainly includes:
[0027] 101. Obtain multiple pilot allocation matrices, where the pilot allocation matrix is obtained based on allocating K pilots to K user terminals in each of the L cells of the large-scale antenna system, and the K pilots are in L multiplexing in a cell.
[0028] The pilot allocation met...
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The invention discloses a pilot frequency distribution method and device, and the technical scheme comprises the steps: obtaining a plurality of pilot frequency distribution matrixes, the pilot frequency distribution matrixes are obtained based on the distribution of K pilot frequencies for K user terminals in each of L cells of a large-scale antenna system, and the K pilot frequencies are multiplexed in the L cells; setting a primary population according to the plurality of pilot frequency distribution matrixes; genetic iteration is carried out on the basis of the primary population, each genetic iteration is carried out on the basis of the fitness value of each pilot frequency distribution matrix in the current population corresponding to the current genetic iteration, and the fitness value reflects the pilot frequency pollution degree generated when pilot frequency distribution is carried out on the user terminal in the large-scale antenna system according to the corresponding pilot frequency distribution matrix; and under the condition that a genetic iteration termination condition is satisfied, determining a fitness value of each pilot frequency distribution matrix in the population corresponding to the termination of genetic iteration, and performing pilot frequency distribution on the user terminal of the large-scale antenna system based on the pilot frequency distribution matrix corresponding to the maximum fitness value.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for allocating pilot frequencies. Background technique [0002] Compared with traditional MIMO technology, massive MIMO (Multiple-Input Multiple Output) technology has significantly improved spectrum efficiency and energy efficiency. Therefore, massive MIMO technology is currently a research hotspot in the field of wireless communication. [0003] In a massive antenna system using massive MIMO technology, accurate estimation of channel state information by base stations in each cell is crucial to achieve high spectral efficiency in a massive antenna system. During uplink communication, the user terminal sends a pilot signal to the base station, and the base station uses the received pilot sequence to perform channel estimation. Due to the shortage of time-frequency resources, the number of available orthogonal pilot sequences is limited...
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Login to View More IPC IPC(8): H04L5/00H04B7/0452
CPCH04L5/0048H04L5/0058H04B7/0452Y02D30/70
Inventor 马子昌
Owner 베이징에스윈컴퓨팅테크놀로지씨오엘티디