主講人：徐景 中國(guó)科學(xué)院無(wú)線(xiàn)傳感網(wǎng)與通信重點(diǎn)實(shí)驗(yàn)室副主任、研究員

時(shí)間：2016年11月23日13:30

地點(diǎn)：奉賢校區(qū)四教D座302

舉辦單位：信息與機(jī)電工程學(xué)院

主講人簡(jiǎn)介：

徐景，男，2005年與東南大學(xué)獲通信與信息系統(tǒng)博士，2005年加入中國(guó)科學(xué)院上海微系統(tǒng)與信息技術(shù)研究所，2010年入選上海市青年科技啟明星（A類(lèi)），2013起為研究員,現(xiàn)任科學(xué)院無(wú)線(xiàn)傳感網(wǎng)與通信重點(diǎn)實(shí)驗(yàn)室副主任。已經(jīng)在國(guó)際期刊（IEEE Trans. Commun.等）和會(huì)議（ICC等）發(fā)表了30 篇論文，編著中文專(zhuān)著1本，著英文專(zhuān)著1章，申請(qǐng)42 個(gè)發(fā)明專(zhuān)利，其中16 個(gè)為國(guó)際發(fā)明專(zhuān)利，已授權(quán)發(fā)明專(zhuān)利7 個(gè)。研究領(lǐng)域?yàn)闊o(wú)線(xiàn)網(wǎng)絡(luò)性能統(tǒng)計(jì)建模及分析、5G（超密集無(wú)線(xiàn)網(wǎng)絡(luò)）和軟件定義無(wú)線(xiàn)網(wǎng)絡(luò)。 

講座介紹：

The statistical characteristics of the signal to interference plus noise ratio (SINR) are closely related to many performance metrics of cellular networks. In this paper, the downlink average rate and SINR distribution are studied for orthogonal frequency division multiple access (OFDMA)-based cellular networks subject to the distance-dependent path loss and shadow fading (SF). With the analytical approximate mean and moment generating function (MGF) of the SINR in the logarithmic domain, the closed-form approximation for the lower and upper bounds of the average rate is obtained. Then the distribution of the SINR in the logarithmic domain is proposed to be approximated as the normal inverse Gaussian (NIG) distribution whose parameters are computed explicitly through moment matching. Also, the closed-form expression for the cumulative distribution function (CDF) of the SINR based on the NIG approximation is derived. Simulation results not only verify the tightness of the bounds, but also show that the NIG approximation is up to one order of magnitude more accurate than the Pearson type IV approximation and at least one order of magnitude more accurate than the lognormal approximation when the SF correlation coefficient is small or the standard deviations of the SF are large or different.