Electromagnetic radiation prediction method of center frequency of FDD-LTE base station

Abstract

The invention discloses an electromagnetic radiation prediction method of center frequency of an FDD-LTE base station. The method comprises the following steps: separately calculating transmission time lengths of a physical broadcast channel (PBCH), a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a downlink control channel (PDCCH) and a downlink shared channel (PDSCH) of the FDD-LTE base station on a 1.08 MHz bandwidth at the center frequency of a downlink transmission bandwidth according to a downlink physical layer transmission mechanism of the FDD-LTE basestation so as to obtain a signal duty ratio of the center frequency of the FDD-LTE base station, and calculating average electromagnetic radiation intensity of the center frequency of the FDD-LTE basestation in combination with the maximum electromagnetic radiation intensity of the center frequency measured by a spectrum analyzer. By adoption of the electromagnetic radiation prediction method disclosed by the invention, the signal transmission conditions on the 1.08 MHz bandwidth at the center frequency of the FDD-LTE downlink transmission bandwidth are analyzed, and the signal duty ratio ofthe center frequency of the FDD-LTE base station is calculated in combination with the data service traffic of the base station and a queuing model, thereby accurately predicting the average electromagnetic radiation intensity of the center frequency of the FDD-LTE base station.

Description

technical field [0001] The invention relates to a method for predicting the center frequency electromagnetic radiation of an FDD-LTE base station. Background technique [0002] Long-term evolution frequency division duplex technology (FDD-LTE) has become the mainstream commercial mobile communication network, and a large number of FDD-LTE base stations have been built, which makes the evaluation of electromagnetic radiation of FDD-LTE base stations very important. In the current research on electromagnetic radiation of FDD-LTE base stations, the literature "In situ LTE exposure of the general public: Characterization and extrapolation" (Joseph W, Verloock L, Goeminne F, et al.Insitu 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 station by measuring synchronization signal and reference signal; Document "Low-cost extrapolation method for max...

AI Technical Summary

Problems solved by technology

The methods provided by these documents cannot be used to predict the average electromagnetic radiation intensity of FDD-LTE base stations

At the same time, the signal transmission at the center frequency of the FDD-LTE base station is different from that at the non-center frequency. There will be differences between the average electromagnetic radiation intensity prediction technology of the FDD-LTE base station center frequency and the average electromagnetic radiation intensity prediction technology of the non-center frequency. There is no relevant literature at present and patents to solve this problem

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