本文關(guān)鍵詞： 無線網(wǎng)絡(luò) 輻射 算法　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：科技現(xiàn)代化的過程中,科技給人們帶來了無盡的便利。但福兮禍所至,無處不在的射頻輻射也危害著人們的健康:無線路由、電腦WiFi、手機輻射等等。醫(yī)生也特別建議孕婦遠離輻射。眾多研究表明手機輻射在細胞層面影響蠻大,而對生殖細胞的影響則更是讓人關(guān)注。因為新生兒胚胎細胞分裂初期,最容易受輻射影響引起意想不到的細胞變異,從而影響胎兒的正常發(fā)育。長期處在射頻輻射下,容易引起煩躁的心理情緒、影響睡眠,甚至引起神經(jīng)衰弱、抑郁等健康問題。不少研究已經(jīng)發(fā)現(xiàn)手機射頻對人體不同組織,有著不同程度的傷害。有研究分析電磁場環(huán)境下分子結(jié)構(gòu)會發(fā)生變化,發(fā)現(xiàn)有50%的研究都表明,RF輻射會損傷DNA、引起染色體結(jié)構(gòu)變化,從而會導(dǎo)致細胞功能失常、細胞癌變、甚至細胞死亡。2011年,WHO已宣布將手機輻射置為Group2B的“可能性致癌”分類中。手機,相比于其他輻射如WiFi、基站輻射,其特點在于通常離大腦很近,頻率更低,電磁輻射更強。根據(jù)路損公式,電磁輻射強度,是根據(jù)發(fā)射源距離、射頻頻率成對數(shù)降低的。而路由發(fā)射功率為20dBm,筆記本電腦無線發(fā)射功率為15dBm,而GSM手機發(fā)射功率通常能達到33dBm。并且路由使用2.4GHz射頻,手機使用的是900MHz射頻。由路損公式不難得出,手機輻射對人體特別是對大腦的輻射傷害,是我們生活環(huán)境中最嚴重的。本論文通過研究蜂窩網(wǎng)原理,確定手機接收到的信號強度增加與輻射減弱的正相關(guān),通過自己設(shè)定的四種算法:旋轉(zhuǎn)算法(將用戶身體當(dāng)作一個障礙物原地旋轉(zhuǎn))、握姿算法(設(shè)計對手機不同的握持姿勢)、貼合度算法(設(shè)定手機與人體頭部的不同距離)、統(tǒng)計算法(統(tǒng)計工作日不同時間段手機信號強度的變化特征)來檢測影響手機信號強度變化的原因,以及影響手機信號強度變化的程度。其目的便在于,找到手機信號變?nèi)醯亩喾N因素,讓用戶在撥打電話過程中能夠找到應(yīng)對的方法。進而盡量降低手機對人體的輻射,最大限度地保護人體健康。通過本論文的研究,用戶自己通過手機可以進行學(xué)習(xí),找到能讓手機接收信號更強的四種因素,調(diào)節(jié)這四種因子便可找到通話過程中手機信號強度更大的區(qū)間,從而讓手機調(diào)節(jié)發(fā)射功率到較低水平并減小輻射。本論文通過不同的實驗場景,分析實驗結(jié)果表明,旋轉(zhuǎn)算法R-ALG、握姿算法H-ALG、貼合度算法P-ALG、統(tǒng)計算法S-ALG分別能夠使手機信號強度有15dB、12dB、2dB、34dB的提高。
[Abstract]:In the process of science and technology modernization, science and technology has brought people endless convenience. But the good luck and disaster, the ubiquitous radio-frequency radiation also endangers people's health: wireless routing, Computer WiFi. cell phone radiation and so on. Doctors especially advise pregnant women to stay away from radiation. Numerous studies have shown that cell phone radiation can have a significant effect on the cellular level, and that the effects on germ cells are even more interesting, because of the early stages of embryonic cell division in newborns. The most vulnerable to radiation is unexpected cell variation, which affects the normal development of the fetus. Being exposed to radiofrequency radiation for a long time can easily lead to irritable psychological emotions, affect sleep, and even cause neurasthenia. Depression and other health problems. Many studies have found that radio frequency of mobile phones can damage different tissues of the human body to varying degrees. Some studies have analyzed changes in molecular structures under electromagnetic fields. It has been found that 50% of the studies have shown that RF radiation can damage DNA and cause changes in chromosome structure, which can lead to cell dysfunction and cell carcinogenesis. Even cell death. In 2011, the WHO announced that mobile phone radiation would be placed in the "probable carcinogenic" category of Group2B. Cell phones are characterized by lower frequencies, usually close to the brain, than other radiation, such as WiFi. base station radiation. Electromagnetic radiation is stronger. According to the road loss formula, the intensity of electromagnetic radiation is based on the distance of the emitter, The RF frequency is logarithmic. The route transmission power is 20dBm, the laptop wireless transmission power is 15dBm. and the GSM mobile phone transmission power usually reaches 33dBm. and the route uses 2.4GHz RF frequency, and the mobile phone uses 900MHz RF. The radiation damage of mobile phone to human body, especially to the brain, is the most serious in our living environment. By studying the principle of cellular network, this paper determines that the increase in the intensity of the signal received by mobile phone is positively related to the weakening of radiation. Through its own set of four algorithms: rotation algorithm (the user's body as an obstacle to rotation in situ, holding posture algorithm (design different holding position of mobile phone, adhesion algorithm) (set the difference between mobile phone and human head). Distance, statistical algorithm (statistics of the characteristics of mobile phone signal intensity change in different periods of the working day) to detect the reasons that affect the change of mobile phone signal intensity. And the extent to which the signal intensity of the mobile phone is affected. Its purpose is to find out the various factors that weaken the signal of the mobile phone, so that the user can find a way to deal with it in the process of making a call, thereby minimizing the radiation of the mobile phone to the human body. To maximize the protection of human health. Through the research in this paper, users can learn from their mobile phones and find out four factors that enable them to receive stronger signals. By adjusting these four factors, we can find a larger range of the mobile phone signal intensity during the call process, so that the mobile phone can adjust the transmitting power to a lower level and reduce the radiation. In this paper, we analyze the experimental results through different experimental scenarios. The rotation algorithm R-ALG, the grip algorithm H-ALG, the pasting algorithm P-ALG, and the statistical algorithm S-ALG can improve the signal strength of the mobile phone by 15 dB / 12dBU / 2dBN / 34dB, respectively.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：R594.8;TN929.53

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本文編號：1514429