本文選題：電磁輻射　切入點：頻譜分析儀　出處：《湘潭大學》2017年碩士論文

【摘要】：近年來,隨著信息技術的迅速發(fā)展,電磁輻射準確測量引起了越來越多研究者的關注,當采用頻譜分析儀對某個電子設備的電磁輻射進行準確測量時,不可避免有噪聲的干擾,噪聲存在給電磁輻射測量結果帶來很大的誤差,特別是對一些弱電磁輻射的測量,噪聲對測量結果的影響很大。目前,為了提高電磁輻射測量的準確性,主要采用的方法是合理設置頻譜分析儀參數(shù),降低噪聲對測量值的影響,但是僅僅設置頻譜分析儀的參數(shù),并不能得到非常準確的基站電磁輻射準確值,而且該方法通用性不強。針對目前存在的問題,本文主要研究內(nèi)容及創(chuàng)新工作如下:(1)在高斯白噪聲環(huán)境下,本文提出了用高斯白噪聲模型計算電磁輻射測量修正因子,從而得到準確的電磁輻射強度值。首先根據(jù)頻譜分析儀工作原理和高斯白噪聲功率譜密度推導出修正因子理論計算公式,然后通過理論值和實測值的比較,來驗證修正因子的準確性。用修正因子修正測量結果,通過實驗發(fā)現(xiàn)用頻譜分析儀測量電磁輻射強度為0.14V/m,修正后電磁輻射強度為0.11V/m,本論文通過實驗驗證了修正因子的準確性,并在實際電磁輻射測量環(huán)境中采用修正因子來得到更加準確的電磁輻射強度值。(2)在脈沖噪聲環(huán)境下,本文提出了用脈沖噪聲模型作為修正因子來修正測量結果。首先根據(jù)脈沖噪聲環(huán)境下噪聲源之間不均衡的概率大大增加,且脈沖噪聲幅度比高斯白噪聲幅度高很多,所以本文根據(jù)頻譜分析儀工作原理及脈沖噪聲模型推導出脈沖噪聲環(huán)境下電磁輻射修正因子,然后通過實驗來驗證修正因子準確性。用修正因子修正測量結果,通過實驗發(fā)現(xiàn)用頻譜分析儀測量電磁輻射強度為0.16V/m,修正后電磁輻射值為0.12V/m,本論文通過實驗驗證了修正因子的準確性,并在實際電磁輻射測量環(huán)境中采用修正因子來得到更加準確的電磁輻射強度值。
[Abstract]:In recent years, with the rapid development of information technology, more and more researchers pay attention to the accurate measurement of electromagnetic radiation.The existence of noise brings great errors to the measurement results of electromagnetic radiation, especially for the measurement of some weak electromagnetic radiation, and the noise has a great influence on the measurement results.At present, in order to improve the accuracy of electromagnetic radiation measurement, the main method is to set the parameters of the spectrum analyzer reasonably to reduce the influence of noise on the measured value, but only to set the parameters of the spectrum analyzer.The accurate electromagnetic radiation of base station can not be obtained, and the method is not universal.Aiming at the existing problems, the main contents and innovative work of this paper are as follows: (1) under the environment of Gao Si white noise, this paper presents a new method to calculate the correction factor of electromagnetic radiation measurement based on Gao Si white noise model, thus obtaining the accurate electromagnetic radiation intensity.Based on the working principle of spectrum analyzer and the power spectral density of Gao Si white noise, the theoretical formula of correction factor is derived, and then the accuracy of the correction factor is verified by comparing the theoretical value with the measured value.In the actual electromagnetic radiation measurement environment, the correction factor is used to get more accurate electromagnetic radiation intensity value. In the pulse noise environment, the pulse noise model is used as the correction factor to correct the measurement results.First of all, according to the probability of imbalance between noise sources under impulse noise environment, and the pulse noise amplitude is much higher than Gao Si white noise amplitude,Therefore, according to the working principle of spectrum analyzer and the model of pulse noise, the correction factor of electromagnetic radiation in the environment of pulse noise is deduced, and then the accuracy of the correction factor is verified by experiments.Using the correction factor to correct the measurement results, it is found that the intensity of electromagnetic radiation measured by the spectrum analyzer is 0.16 V / m, and the corrected electromagnetic radiation value is 0.12 V / m. The accuracy of the correction factor is verified by experiments in this paper.The correction factor is used to obtain more accurate electromagnetic radiation intensity in the actual electromagnetic radiation measurement environment.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM937

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本文編號：1730432