本文選題：多天線　切入點(diǎn)：空間分集　出處：《內(nèi)蒙古大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：多天線技術(shù)是通信技術(shù)發(fā)展的關(guān)鍵技術(shù)之一,LTE通信系統(tǒng)的多天線技術(shù)主要包括空間分集、空間復(fù)用和波束賦形技術(shù)。其中,空間分集和空間復(fù)用技術(shù)不僅能夠很好地解決通信過程中的多徑影響,還能夠整體提升通信系統(tǒng)的性能。空間分集能夠提供分集增益,在提高信號(hào)穩(wěn)定性方面得到了廣泛應(yīng)用;而空間復(fù)用能夠提供復(fù)用增益,從而充分利用頻帶資源。同時(shí),在兩種增益之間也存在一種折中關(guān)系。本文在理論基礎(chǔ)上,利用軟件OPNET18.0搭建仿真平臺(tái),主要針對(duì)LTE系統(tǒng)8種傳輸模式中的開環(huán)發(fā)射分集和開環(huán)空間復(fù)用技術(shù)進(jìn)行研究。首先,對(duì)空間復(fù)用技術(shù)在單小區(qū)場(chǎng)景和多小區(qū)場(chǎng)景下的研究,通過信道利用率、時(shí)延和吞吐量等分析網(wǎng)絡(luò)性能,驗(yàn)證了空間復(fù)用技術(shù)在提升系統(tǒng)吞吐量/頻譜利用率方面的優(yōu)勢(shì)。其次,對(duì)用戶處于小區(qū)邊緣的情況下,通過對(duì)信噪比和丟包率等參數(shù)的分析,驗(yàn)證了空間分集技術(shù)在提升通信穩(wěn)定性方面的優(yōu)勢(shì)。最后,根據(jù)空間分集與空間復(fù)用的技術(shù)特點(diǎn),從網(wǎng)絡(luò)層面分析和研究了空間分集和空間復(fù)用的折中問題,并通過仿真分析了多小區(qū)場(chǎng)景下的性能及其可行性。仿真結(jié)果表明:空間分集和空間復(fù)用在網(wǎng)絡(luò)層面的折中,能夠?qū)φw的通信性能帶來一定的提升。
[Abstract]:Multi-antenna technology is one of the key technologies in the development of communication technology. The multi-antenna technology of LTE communication system mainly includes spatial diversity, spatial multiplexing and beamforming. Spatial diversity and spatial multiplexing can not only solve the multipath influence in the communication process, but also improve the performance of the communication system as a whole. Spatial diversity can provide diversity gain and is widely used in improving the signal stability. Spatial multiplexing can provide the multiplexing gain and make full use of the frequency band resources. At the same time, there is a compromise relationship between the two gains. Based on the theory, this paper uses the software OPNET18.0 to build a simulation platform. This paper focuses on the open loop transmit diversity and open loop spatial multiplexing technology in 8 transmission modes of LTE system. Firstly, the research of spatial multiplexing technology in single cell scene and multi cell scenario is carried out through channel utilization. The analysis of network performance such as delay and throughput verifies the superiority of spatial multiplexing in improving the throughput / spectrum efficiency of the system. Secondly, when the user is on the edge of the cell, the SNR and packet loss rate are analyzed. The advantages of spatial diversity in improving communication stability are verified. Finally, according to the technical characteristics of spatial diversity and spatial multiplexing, the compromise between spatial diversity and spatial multiplexing is analyzed and studied from the network level. The simulation results show that the compromise between spatial diversity and spatial reuse in the network level can improve the overall communication performance.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.5

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本文編號(hào)：1589070