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FDD-LTE base station non-central frequency electromagnetic radiation prediction method

A prediction method, electromagnetic radiation technology, applied in electrical components, digital transmission systems, transmission systems, etc., can solve problems that cannot be used to predict the average electromagnetic radiation intensity of non-center frequencies of FDD-LTE base stations

Active Publication Date: 2018-06-29
XIANGTAN UNIV
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Problems solved by technology

The methods provided in these documents only consider the maximum electromagnetic radiation intensity at the center frequency of the FDD-LTE base station, and cannot be used to predict the average electromagnetic radiation intensity of the non-center frequency of the FDD-LTE base station

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  • FDD-LTE base station non-central frequency electromagnetic radiation prediction method
  • FDD-LTE base station non-central frequency electromagnetic radiation prediction method
  • FDD-LTE base station non-central frequency electromagnetic radiation prediction method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] The implementation object of the present invention is an FDD-LTE base station, the downlink bandwidth is 20MHz (1840MHz-1860MHz), wherein the downlink transmission bandwidth is 18MHz (1841MHz-1859MHz), and the center frequency of the downlink transmission bandwidth is 1850MHz. The measurement equipment uses a portable spectrum analyzer (KEYSIGHT N9918A, the maximum measurement frequency is 26.5GHz) and a logarithmic periodic antenna (HyperLOG 60180, the measurement frequency range is 680MHz-18GHz). The antenna factor AF of the receiving antenna at 1.8GHz is 30dB / m. The cable loss is 3dB. The flow chart of the present invention is as figure 1 shown.

[0034] A kind of FDD-LTE base station non-center frequency electromagnetic radiation prediction method of the present invention comprises the following steps:

[0035] 1) There are physical downli...

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Abstract

The invention discloses a FDD-LTE base station non-central frequency electromagnetic radiation prediction method. The method comprises the following steps: partitioning a downlink transmission bandwidth of non-central frequency according to a resource block group (RBG) at first; computing transmission duration of a physical downlink control channel (PDCCH) and a physical downlink shared channel (PSDCH) of the frequency located by each group of RBG of the non-central frequency of the FDD-LTE base station by combining with the base station data service traffic according to the FDD-LTE base station downlink physical transmission mechanism, thereby obtaining a FDD-LTE signal duty ratio; and finally obtaining a prediction result of the average electromagnetic radiation strength of the non-central frequency of the FDD-LTE base station by combining with the maximum electromagnetic radiation strength of the frequency located by each group of RBG measured by a frequency spectrum analyzer. According to the transmission situation of the non-central downlink signal of the FDD-LTE, the average electromagnetic radiation strength of the non-central frequency of the FDD-LTE base station can be accurately predicted by combining the base station data service traffic and queen model computation.

Description

technical field [0001] The invention relates to a method for predicting non-center frequency electromagnetic radiation of an FDD-LTE base station. Background technique [0002] The current research on electromagnetic radiation of long-term evolution frequency division duplex (FDD-LTE) base stations, the document "In situ LTE exposure of the general public: Characterization and extrapolation" (JosephW, Verloock L, Goeminne F, et al.In situ LTE exposure of the general public:Characterization and extrapolation[J].Bioelectromagnetics,2012,33(6):466.) Predict the maximum electromagnetic radiation intensity of FDD-LTE base stations by measuring synchronization signals and reference signals; literature "Low-costextrapolation method for maximal LTE radio base station exposure estimation:test and validation》(Verloock L,Joseph W,Gati A,et al.Low-cost extrapolation method for maximal LTE radio base station exposure estimation:test and validation[J].Radiation Protection Dosimetry,2013, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/08H04L12/24
CPCH04L41/147H04W24/08
Inventor 杨万春罗昱谭平安彭艳芬
Owner XIANGTAN UNIV
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