本文關(guān)鍵詞： 分布式大規(guī)模多輸入多輸出 多用戶 時(shí)間相關(guān)信道 頻譜效率　出處：《信號(hào)處理》2016年11期 　論文類型：期刊論文

【摘要】：為了分析時(shí)變信道特性對(duì)多用戶分布式大規(guī)模MIMO系統(tǒng)的頻譜效率性能影響,通過引入一階高斯馬爾科夫過程來建模時(shí)變信道,以時(shí)間相關(guān)性系數(shù)表征時(shí)變快慢程度。當(dāng)系統(tǒng)采用最大比合并(MRC)接收和最大比發(fā)送(MRT)預(yù)編碼方案時(shí),借助于確定性等價(jià)原理以及Gamma分布隨機(jī)變量的性質(zhì),推導(dǎo)出了含有信道時(shí)變信息的上行和下行頻譜效率閉合表達(dá)式。同時(shí),給出了當(dāng)基站總發(fā)送天線數(shù)與用戶個(gè)數(shù)之比趨于無窮大時(shí),頻譜效率的極限表達(dá)式。分析表明,頻譜效率隨時(shí)間相關(guān)系數(shù)減小而降低,但并不影響系統(tǒng)所獲得的發(fā)射功率增益。數(shù)值仿真驗(yàn)證了所推導(dǎo)的頻譜效率閉合表達(dá)式和極限值的有效性和精確性,并比較得出時(shí)變信道下分布式大規(guī)模MIMO比集中式大規(guī)模MIMO具有更好的性能。
[Abstract]:In order to influence the performance of spectrum efficiency analysis of time-varying channel characteristics of large-scale multi-user distributed MIMO system, by introducing a first-order Gauss Markov process to model the time-varying channel, the time correlation coefficient characterizes time-varying speed. When using maximum ratio combining (MRC) receive ratio and maximum (MRT) pre encoding scheme. With the help of certainty equivalence principle and the properties of Gamma distributed random variable, is derived with the uplink and downlink channel spectrum efficiency closed expression of time-varying information. At the same time, given the total number of transmit antennas when the base station and the user number ratio tends to infinity, the ultimate expression of spectral efficiency. The results show that the spectral efficiency with time the correlation coefficient decreased, but does not affect the transmission power gain access to the system. The numerical simulation verifies the spectral efficiency of the closed form expression and limit value The effectiveness and accuracy of distributed large scale MIMO under time-varying channels are better than that of centralized large scale MIMO.

【作者單位】： 東南大學(xué)信息科學(xué)與工程學(xué)院;池州學(xué)院機(jī)電工程學(xué)院;
【基金】：國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)(2015AA01A703) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)(2013CB336600) 國(guó)家自然科學(xué)基金(61372101,61671144,61271018) 江蘇省科技計(jì)劃項(xiàng)目(BE2015156) 安徽省高校自然科學(xué)研究項(xiàng)目(KJ2015A198)
【分類號(hào)】：TN919.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 夏志成;羅進(jìn)文;商艷麗;;第三代移動(dòng)通信系統(tǒng)頻譜效率的研究[J];信息技術(shù);2007年10期

2 黃曉宇;劉望軍;;寬帶無線通信網(wǎng)絡(luò)中頻譜效率的計(jì)算方法[J];中國(guó)無線電;2006年01期

3 張R，

本文編號(hào)：1531890