CN109738710A - A kind of base station indoor electromagnetic radiation estimation method based on path loss - Google Patents
A kind of base station indoor electromagnetic radiation estimation method based on path loss Download PDFInfo
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Abstract
The base station indoor electromagnetic radiation estimation method based on path loss that the invention discloses a kind of, this method considers influence of the path loss to base station indoor electromagnetic radiation, pass through the outdoor path loss of the horizontal distance calculation base station signal where story height and base station where Base Transmitter antenna height, user and user between building, in conjunction with wall penetration loss, calculation base station signal penetrates the power after building wall, calculates electromagnetic radiation intensity suffered by user further according to the distance between indoor path loss, user and building wall.The present invention can quickly and accurately assess base station indoor electromagnetic radiation intensity, have biggish reference value to the research of base station electromagnetic radiation exposure situation, have certain social benefit.
Description
Technical field
The base station indoor electromagnetic radiation estimation method based on path loss that the present invention relates to a kind of.
Background technique
With the development of mobile communication technology, the influence of Electromagnetic Radiation on Environment and public health caused by communication base station
Extensive concern by society.Currently, generalling use the special measurements such as spectrum analyzer to the assessment of base station electromagnetic radiation intensity
Instrument measures.However these measuring instrument prevailing prices are expensive, only the researcher of institution of higher learning and professional institution has
The condition of standby assessment base station electromagnetic radiation intensity.
In view of the deficiencies of the prior art, the present invention proposes a kind of base station indoor electromagnetic radiation estimation side based on path loss
Method.This method considers influence of the path loss to base station indoor electromagnetic radiation, by where Base Transmitter antenna height, user
The outdoor path loss of horizontal distance calculation base station signal between story height and base station and user place building, combining wall
Wall penetration loss, calculation base station signal penetrate the power after building wall, further according to indoor path loss, user and building wall
The distance between calculate electromagnetic radiation intensity suffered by user.Experiment shows that method proposed by the present invention can be got rid of specially
With the limitation of measuring instrument, base station indoor electromagnetic radiation intensity is accurately estimated.
Summary of the invention
The base station indoor electromagnetic radiation estimation based on path loss that in order to solve the above technical problem, the present invention provides a kind of
Method, comprising the following steps:
1) according to the water where story height and base station where Base Transmitter antenna height, user and user between building
The flat outdoor path loss apart from calculation base station signal；
2) the outdoor path loss obtained according to wall penetration loss and step 1), calculation base station signal penetrate building wall
Power afterwards；
3) it is penetrated according to the base station signal that the distance between indoor path loss, user and building wall and step 2) obtain
Power after building wall calculates electromagnetic radiation intensity suffered by user.
A kind of above-mentioned base station indoor electromagnetic radiation estimation method based on path loss, in the step 1), base station letter
Number outdoor path loss are as follows:
In above formula, LoutIndicate the outdoor path loss of base station signal, unit dB, hbsIndicate Base Transmitter antenna height,
Unit is rice, hufStory height where indicating user, unit are rice, the level where l indicates base station and user between building
Distance, unit are rice.
A kind of above-mentioned base station indoor electromagnetic radiation estimation method based on path loss, in the step 2), base station letter
Number penetrate the power after building wall are as follows:
In above formula, PinIndicate that base station signal penetrates the power after building wall, unit W, PtIndicate base station transmitting power,
Unit is W, and G indicates Base Transmitter antenna gain, unit dB, LoutIndicate that the outdoor path loss of base station signal, unit are
DB, LtwIndicate wall penetration loss, value 20, unit dB.
A kind of above-mentioned base station indoor electromagnetic radiation estimation method based on path loss, in the step 3), Yong Husuo
The electromagnetic radiation intensity being subject to are as follows:
In above formula, E indicates electromagnetic radiation intensity suffered by user, unit V/m, PinIndicate that base station signal penetrates building
Power after wall, unit W, dinIndicate the distance between user and building wall, unit is rice, LinIndicate indoor path
Loss, expression formula are as follows: Lin=0.5din, unit dB.
The beneficial effects of the present invention are: influence of the path loss to base station indoor electromagnetic radiation is considered, base station is passed through
Horizontal distance calculation base station signal between story height and base station where height of transmitting antenna, user and user place building
Outdoor path loss, in conjunction with wall penetration loss, calculation base station signal penetrates the power after building wall, further according to indoor road
The distance between diameter loss, user and building wall calculate electromagnetic radiation intensity suffered by user.This method can be got rid of
The limitation of special measurement instrument quickly and accurately estimates base station indoor electromagnetic radiation intensity, to base station electromagnetic radiation exposure situation
Research have biggish reference value, have certain social benefit.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in more detail.The present embodiment before being with the content of present invention
Progress is put, gives detailed implementation steps, but protection scope of the present invention is not limited to following embodiments.
The present embodiment estimates the base station the FDD-LTE electromagnetic radiation intensity in campus inside five building, certain laboratory building, to estimating
The experimental measurement that meter result is verified is portable frequency spectrum analyzer Keysight FieldFox N9918A and period
Logarithm antenna HyperLOG 60180.
The present invention provides a kind of base station indoor electromagnetic radiation estimation method based on path loss, comprising the following steps:
1) according to the water where story height and base station where Base Transmitter antenna height, user and user between building
The flat outdoor path loss apart from calculation base station signal；
2) the outdoor path loss obtained according to wall penetration loss and step 1), calculation base station signal penetrate building wall
Power afterwards；
3) it is penetrated according to the base station signal that the distance between indoor path loss, user and building wall and step 2) obtain
Power after building wall calculates electromagnetic radiation intensity suffered by user.
In the step 1), Base Transmitter antenna height hbs=51 meters, story height h where useruf=13.5 meters, base
L=31 meters of horizontal distance to stand between the building of user place, the outdoor path loss of base station signal are as follows:
In the step 2), base station transmitting power Pt=20W, Base Transmitter antenna gain G=16dB, wall penetration loss
Ltw=20dB, base station signal penetrate the power after building wall are as follows:
In the step 3), the distance between user and building wall din=2 meters, indoor path loss Lin=0.52
=1dB, electromagnetic radiation intensity suffered by user are as follows:
The present embodiment carries out the base station the FDD-LTE electromagnetic radiation intensity inside five building, laboratory building using spectrum analyzer
Measurement, measured value 0.0117V/m is almost the same with the estimated value of method used herein, illustrate to utilize the method can be with
Rapidly base station indoor electromagnetic radiation intensity is accurately estimated, demonstrates the validity of method used herein.
Claims (4)
1. a kind of base station indoor electromagnetic radiation estimation method based on path loss, which comprises the steps of:
1) according to where Base Transmitter antenna height, story height where user and base station and user between building it is horizontal away from
Outdoor path loss from calculation base station signal；
2) the outdoor path loss obtained according to wall penetration loss and step 1), after calculation base station signal penetrates building wall
Power；
3) building is penetrated according to the base station signal that the distance between indoor path loss, user and building wall and step 2) obtain
Power after wall calculates electromagnetic radiation intensity suffered by user.
2. a kind of base station indoor electromagnetic radiation estimation method based on path loss as described in claim 1, which is characterized in that
In the step 1), the outdoor path loss of base station signal are as follows:
In above formula, LoutIndicate the outdoor path loss of base station signal, unit dB, hbsIndicate Base Transmitter antenna height, unit
For rice, hufStory height where indicating user, unit are rice, the horizontal distance where l indicates base station and user between building,
Unit is rice.
3. a kind of base station indoor electromagnetic radiation estimation method based on path loss as described in claim 1, which is characterized in that
In the step 2), base station signal penetrates the power after building wall are as follows:
In above formula, PinIndicate that base station signal penetrates the power after building wall, unit W, PtIndicate base station transmitting power, unit
Base Transmitter antenna gain, unit dB, L are indicated for W, GoutIndicate the outdoor path loss of base station signal, unit dB, Ltw
Indicate wall penetration loss, value 20, unit dB.
4. a kind of base station indoor electromagnetic radiation estimation method based on path loss as described in claim 1, which is characterized in that
In the step 3), electromagnetic radiation intensity suffered by user are as follows:
In above formula, E indicates electromagnetic radiation intensity suffered by user, unit V/m, PinIndicate that base station signal penetrates building wall
Power afterwards, unit W, dinIndicate the distance between user and building wall, unit is rice, LinIndicate indoor path loss,
Its expression formula are as follows: Lin=0.5din, unit dB.
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| CN110342903A (en) * | 2019-06-28 | 2019-10-18 | 王新华 | A kind of low penetration loss base station 5G material and production method of laying bricks |
| CN110932804A (en) * | 2019-12-19 | 2020-03-27 | 湘潭大学 | Method for predicting average electromagnetic radiation of base station |
| CN110995380A (en) * | 2019-12-18 | 2020-04-10 | 湘潭大学 | Indoor base station electromagnetic radiation prediction method |
| CN110995371A (en) * | 2019-12-23 | 2020-04-10 | 湘潭大学 | Base station electromagnetic radiation evaluation method in diffraction environment |
| CN111010248A (en) * | 2019-12-23 | 2020-04-14 | 湘潭大学 | Base station electromagnetic radiation prediction method based on building |
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