本文選題：大規(guī)模多輸入多輸出 + 兩跳中繼�。� 參考：《電子與信息學(xué)報(bào)》2017年01期

【摘要】：該文針對(duì)成對(duì)用戶大規(guī)模MIMO中繼系統(tǒng),研究了最優(yōu)能效準(zhǔn)則下的系統(tǒng)參數(shù)設(shè)計(jì)。在中繼采用最大比合并/最大比發(fā)射(MRC/MRT)預(yù)編碼方案下,借助于大數(shù)定律,推導(dǎo)出能效函數(shù)關(guān)于用戶發(fā)射功率、中繼發(fā)射功率和中繼天線數(shù)的解析表達(dá)式。根據(jù)能效函數(shù)性質(zhì),分別證明了全局最優(yōu)發(fā)射向量和最優(yōu)天線數(shù)的存在性和唯一性。為了求解最優(yōu)發(fā)射功率,利用分?jǐn)?shù)規(guī)劃,將原優(yōu)化問(wèn)題轉(zhuǎn)換為等價(jià)的減法形式,進(jìn)而提出一種新的低復(fù)雜度迭代優(yōu)化算法,并求得最優(yōu)發(fā)射功率的閉合解。對(duì)于最優(yōu)天線數(shù),則利用Lambert W函數(shù),得到了能效最大時(shí)的最優(yōu)天線數(shù)閉合解。通過(guò)數(shù)值仿真,驗(yàn)證了所提功率優(yōu)化算法以極少迭代次數(shù)取得了接近最優(yōu)算法的性能,并驗(yàn)證了所給出的最優(yōu)天線數(shù)閉合解的精確性。
[Abstract]:In this paper, the design of system parameters based on the optimal energy efficiency criterion is studied for large scale MIMO relay systems with pairs of users. Based on the law of large numbers, the analytical expressions of energy efficiency function for user transmit power, relay transmit power and relay antenna number are derived under the MRC / MRT precoding scheme. According to the properties of the energy efficiency function, the existence and uniqueness of the global optimal transmit vector and the optimal antenna number are proved respectively. In order to solve the optimal transmit power, the original optimization problem is transformed into the equivalent subtraction form by fractional programming, and a new low complexity iterative optimization algorithm is proposed, and the closed solution of the optimal transmit power is obtained. For the optimal number of antennas, the closed solution of the optimal number of antennas with maximum energy efficiency is obtained by using the Lambert W function. The performance of the proposed power optimization algorithm is verified by numerical simulation, and the accuracy of the closed solution of the optimal antenna number is verified with a small number of iterations.
【作者單位】： 東南大學(xué)信息科學(xué)與工程學(xué)院;
【基金】：國(guó)家863計(jì)劃項(xiàng)目(2015AA01A703) 國(guó)家自然科學(xué)基金(61372101,61271018,61671144) 江蘇省科技計(jì)劃項(xiàng)目(BE2015156) 江蘇省高校自然科學(xué)研究面上項(xiàng)目(16KJB510008)~~
【分類號(hào)】：TN919.3

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本文編號(hào)：1924242