本文關(guān)鍵詞： 無(wú)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(guò)程中,科技給人們帶來(lái)了無(wú)盡的便利。但福兮禍所至,無(wú)處不在的射頻輻射也危害著人們的健康:無(wú)線路由、電腦WiFi、手機(jī)輻射等等。醫(yī)生也特別建議孕婦遠(yuǎn)離輻射。眾多研究表明手機(jī)輻射在細(xì)胞層面影響蠻大,而對(duì)生殖細(xì)胞的影響則更是讓人關(guān)注。因?yàn)樾律鷥号咛ゼ?xì)胞分裂初期,最容易受輻射影響引起意想不到的細(xì)胞變異,從而影響胎兒的正常發(fā)育。長(zhǎng)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(wèn)題。不少研究已經(jīng)發(fā)現(xiàn)手機(jī)射頻對(duì)人體不同組織,有著不同程度的傷害。有研究分析電磁場(chǎng)環(huán)境下分子結(jié)構(gòu)會(huì)發(fā)生變化,發(fā)現(xiàn)有50%的研究都表明,RF輻射會(huì)損傷DNA、引起染色體結(jié)構(gòu)變化,從而會(huì)導(dǎo)致細(xì)胞功能失常、細(xì)胞癌變、甚至細(xì)胞死亡。2011年,WHO已宣布將手機(jī)輻射置為Group2B的“可能性致癌”分類中。手機(jī),相比于其他輻射如WiFi、基站輻射,其特點(diǎn)在于通常離大腦很近,頻率更低,電磁輻射更強(qiáng)。根據(jù)路損公式,電磁輻射強(qiáng)度,是根據(jù)發(fā)射源距離、射頻頻率成對(duì)數(shù)降低的。而路由發(fā)射功率為20dBm,筆記本電腦無(wú)線發(fā)射功率為15dBm,而GSM手機(jī)發(fā)射功率通常能達(dá)到33dBm。并且路由使用2.4GHz射頻,手機(jī)使用的是900MHz射頻。由路損公式不難得出,手機(jī)輻射對(duì)人體特別是對(duì)大腦的輻射傷害,是我們生活環(huán)境中最嚴(yán)重的。本論文通過(guò)研究蜂窩網(wǎng)原理,確定手機(jī)接收到的信號(hào)強(qiáng)度增加與輻射減弱的正相關(guān),通過(guò)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(gè)障礙物原地旋轉(zhuǎn))、握姿算法(設(shè)計(jì)對(duì)手機(jī)不同的握持姿勢(shì))、貼合度算法(設(shè)定手機(jī)與人體頭部的不同距離)、統(tǒng)計(jì)算法(統(tǒng)計(jì)工作日不同時(shí)間段手機(jī)信號(hào)強(qiáng)度的變化特征)來(lái)檢測(cè)影響手機(jī)信號(hào)強(qiáng)度變化的原因,以及影響手機(jī)信號(hào)強(qiáng)度變化的程度。其目的便在于,找到手機(jī)信號(hào)變?nèi)醯亩喾N因素,讓用戶在撥打電話過(guò)程中能夠找到應(yīng)對(duì)的方法。進(jìn)而盡量降低手機(jī)對(duì)人體的輻射,最大限度地保護(hù)人體健康。通過(guò)本論文的研究,用戶自己通過(guò)手機(jī)可以進(jìn)行學(xué)習(xí),找到能讓手機(jī)接收信號(hào)更強(qiáng)的四種因素,調(diào)節(jié)這四種因子便可找到通話過(guò)程中手機(jī)信號(hào)強(qiáng)度更大的區(qū)間,從而讓手機(jī)調(diào)節(jié)發(fā)射功率到較低水平并減小輻射。本論文通過(guò)不同的實(shí)驗(yàn)場(chǎng)景,分析實(shí)驗(yàn)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(jì)算法S-ALG分別能夠使手機(jī)信號(hào)強(qiáng)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(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：R594.8;TN929.53

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