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A prediction method of non-center frequency electromagnetic radiation of fdd-lte base station

A prediction method and electromagnetic radiation technology, applied in electrical components, digital transmission systems, data exchange networks, 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: 2021-04-13
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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  • A prediction method of non-center frequency electromagnetic radiation of fdd-lte base station
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  • A prediction method of non-center frequency electromagnetic radiation of fdd-lte base station

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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-center frequency electromagnetic radiation prediction method, the steps of which are as follows: firstly, the downlink transmission bandwidth of the non-center frequency is divided into resource block groups (RBGs), and according to the downlink physical layer transmission mechanism of the FDD-LTE base station , combined with the data traffic of the base station, calculate the transmission duration of the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) of each group of RBGs of the non-center frequency of the FDD-LTE base station, so as to obtain the FDD-LTE signal The duty cycle, combined with the maximum electromagnetic radiation intensity of each group of RBG frequencies measured by the spectrum analyzer, finally obtains the prediction result of the average electromagnetic radiation intensity of the non-center frequency of the FDD‑LTE base station. According to the transmission situation of FDD-LTE non-central frequency downlink signals, the present invention accurately predicts the average electromagnetic radiation intensity of FDD-LTE base station non-central frequency in combination with base station data traffic and queuing model calculation.

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 Patents(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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