發(fā)布時間：2018-04-18 19:13

  本文選題：波達(dá)信號 + 仰角函數(shù)�。� 參考：《物理學(xué)報》2014年24期

【摘要】：在三維(3 dimensional,3D)空間域信道建模中,針對波達(dá)信號仰角(elevation angle,EA)在不同覆蓋區(qū)散射體環(huán)境中的分布,提出了指數(shù)型EA仰角概率密度函數(shù)并對其信道特征實(shí)現(xiàn)建模.在假設(shè)波達(dá)信號方位譜為均勻分布時,采用近似算法在對稱和非對稱兩種情況下導(dǎo)出其多普勒功率譜密度(power spectral density,PSD)閉合表達(dá)式.從分析結(jié)果可發(fā)現(xiàn)PSD與仰角函數(shù)式及波達(dá)信號邊界角度參數(shù)βmin和βmax關(guān)系密切,并與多普勒頻移密切相關(guān).對該三維空間域中的多輸入多輸出(multiple input multiple output,MIMO)多天線信號衰落相關(guān)性(spatial fading correlation,SFC)進(jìn)行了推導(dǎo)和仿真.結(jié)果表明MIMO多天線陣元間SFC與βmin和βmax關(guān)系密切,而EA仰角概率密度函數(shù)參數(shù)n對SFC影響較小.本文引入的指數(shù)型EA仰角概率密度函數(shù)可應(yīng)用于多種無線通信環(huán)境下的信道參數(shù)估計,且與傳統(tǒng)模型對比表明本模型的信道參數(shù)估計結(jié)果符合理論和經(jīng)驗值,拓展了對3D空間域統(tǒng)計信道的建模與MIMO多天線分析計算.
[Abstract]:In 3D 3D spatial channel modeling, the exponential EA elevation probability density function is proposed and its channel characteristics are modeled for the distribution of elevation elevation EAA in different coverage area.Under the assumption that the azimuth spectrum of the DOA signal is uniformly distributed, an approximate algorithm is used to derive the closed expression of the Doppler power spectral density power spectral density (PSDs) under both symmetric and asymmetric conditions.It is found that PSD is closely related to elevation function and boundary angle parameters 尾 min and 尾 max, and is closely related to Doppler frequency shift.In this paper, the spatial fading correlation (SFCs) of multiple input multiple outputMimo signals in the three dimensional space domain is derived and simulated.The results show that there is a close relationship between SFC and 尾 min and 尾 max among MIMO multi-antenna array elements, while the parameter n of EA elevation probability density function has little effect on SFC.The exponential EA elevation probability density function introduced in this paper can be applied to the channel parameter estimation in various wireless communication environments. The comparison with the traditional model shows that the channel parameter estimation results of this model are in accordance with the theoretical and empirical values.The modeling of statistical channel in 3D spatial domain and the analysis and calculation of MIMO multi-antenna are extended.
【作者單位】： 南京信息工程大學(xué)電子與信息工程學(xué)院;日本國立新瀉大學(xué)工學(xué)部;
【基金】：國家自然科學(xué)基金(批準(zhǔn)號:61372128,61471153) 江蘇省科技支撐計劃(工業(yè))項目(批準(zhǔn)號:BE2011195) 江蘇省高校自然科學(xué)科學(xué)研究重大計劃項目(批準(zhǔn)號:14KJA510001) 中國博士后基金(批準(zhǔn)號:010986678)資助的課題~~
【分類號】：TN820

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本文編號：1769684