A Method for Evaluating the Intensity of Electromagnetic Radiation of a Base Station
A technology of electromagnetic radiation intensity and electromagnetic radiation, applied in the fields of electromagnetic field characteristics, measurement of electrical variables, instruments, etc., can solve problems such as only a few minutes, and achieve the effect of great reference value
Active Publication Date: 2020-06-12
XIANGTAN UNIV
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Problems solved by technology
[0002] In the electromagnetic radiation test of the base station, the measured value of the electromagnetic radiation of the base station is constantly changing. We can select the maximum value from the measured value to evaluate the electromagnetic radiation intensity of the base station, but the problem is that in general electromagnetic radiation evaluation, the measurement time is only a few seconds. Minutes, is the maximum measured value obtained in those few minutes the maximum value in the actual electromagnetic radiation? If not, what is the probability that the maximum value in the actual electromagnetic radiation is greater than the maximum value in the current measurement? In the published literature and patents, there is no good way to solve this problem
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[0014] The present invention will be further described below in conjunction with embodiment.
[0015] The implementation object of the present invention is a GSM base station, the downlink transmission frequency is 935.4MHz, and the measurement equipment adopts 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 invention patent includes the following steps:
[0016] 1) First, test the electromagnetic radiation intensity of the communication base station, obtain 5000 electromagnetic radiation measurement values, and find the maximum value E among the 5000 measurement values max 3.75V / m;
[0017] 2) Randomly select 1000 (k=5000·20%=1000) from the 5000 electromagnetic radiation measurement values in step 1), and calculate the average value of these 1000 measurement values;
[0018] 3) Repeat random selection of 1000 electromagne...
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The invention discloses a base station electromagnetic radiation strength assessment method. The method comprises the steps that firstly, a certain amount of electromagnetic radiation measurement values are obtained through tests, and a maximum value is found from the electromagnetic radiation measurement values; then an operation is repeatedly performed (the operation is that 20% of the measuredvalues are randomly selected and conducted with average value taking) to obtain a certain number of mean values, a maximum value is found from the mean values; and then the probability of that an actual electromagnetic radiation maximum value is greater than the maximum value of the measured values is obtained through an electromagnetic radiation strength statistical distribution law. According tothe method, the probability of that the actual electromagnetic radiation maximum value is greater than the maximum value of the measured values is concluded through an electromagnetic radiation measurement value condition and the statistical distribution law of base station electromagnetic radiation strength changes, and the method has great reference value for base station construction and environmental protection.
Description
technical field [0001] This patent relates to a method for evaluating the intensity of electromagnetic radiation of a base station. Background technique [0002] In the electromagnetic radiation test of the base station, the measured value of the electromagnetic radiation of the base station is constantly changing. We can select the maximum value from the measured value to evaluate the electromagnetic radiation intensity of the base station, but the problem is that in the general electromagnetic radiation evaluation, the measurement time is only a few seconds. Minutes, is the maximum measured value obtained in those few minutes the maximum value in the actual electromagnetic radiation? If not, what is the probability that the maximum value in the actual electromagnetic radiation is greater than the maximum value in the current measurement? At present, in the published literature and patents, there is no good method to solve this problem. Contents of the invention [0003...
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IPC IPC(8): G01R29/08
CPCG01R29/0857
Inventor 杨万春张雪卢泽斌高协平邓书华彭艳芬
Owner XIANGTAN UNIV