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  本文關(guān)鍵詞：空間調(diào)制預(yù)編碼MIMO系統(tǒng)性能研究　出處：《五邑大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 空間調(diào)制 預(yù)編碼 線性分組碼 輔助天線 MIMO

【摘要】：隨著無線通信的發(fā)展和移動電話的增多,給用戶提供無處不在的高質(zhì)量通信服務(wù)是無線通信技術(shù)發(fā)展的根本動力,但是無線頻譜資源的有限性、稀缺性使得探求高速、可靠的通信系統(tǒng),成為了無線通信領(lǐng)域研究的熱點(diǎn)和難點(diǎn)課題。多輸入多輸出(Multiple Input Multiple Output,MIMO)技術(shù)作為下一代無線通信領(lǐng)域的核心技術(shù),與傳統(tǒng)的單輸入單輸出(Single Input Single Output,SISO)技術(shù)相比,在配置、功耗和頻譜帶寬相同的情況下MIMO系統(tǒng)具有更出色的性能。由于大規(guī)模的MIMO系統(tǒng)中配置多根發(fā)送和接收天線,這樣使得接收端在檢測時復(fù)雜度大大提高。為了降低接收端檢測時的計算復(fù)雜度,同時又不損失分集增益。本文設(shè)計了基于MMSE預(yù)編碼空間調(diào)制MIMO系統(tǒng),在接收端知道信道狀態(tài)信息的情況下,選擇適合的接收天線進(jìn)行數(shù)據(jù)接收,這樣既保證了系統(tǒng)的分集增益,又降低了系統(tǒng)的檢測復(fù)雜度�？臻g調(diào)制(Spatial Modulation,SM)技術(shù)在利用傳統(tǒng)調(diào)制符號攜帶信息的同時,還利用發(fā)送天線的空間位置攜帶信息。因此SM系統(tǒng)可以用較少的天線,發(fā)送較多的比特信息。為了提高SM-MIMO通信系統(tǒng)誤碼性能,本文提出了一種使用線性分組碼設(shè)計發(fā)射天線星座圖的MIMO系統(tǒng)方案,以(5,2)漢明碼為例設(shè)計了兩組最小碼距分別為2和3的發(fā)射天線星座。仿真結(jié)果表明在傳輸速率相同時,本文設(shè)計的多天線通信系統(tǒng)在發(fā)射功率低于文獻(xiàn)[27]時具有更好的誤碼性能,在實際應(yīng)用在由于使用更少的發(fā)射鏈路,從而節(jié)約了硬件成本。為了進(jìn)一步提高M(jìn)IMO通信系統(tǒng)的誤碼性能,本文將以現(xiàn)有的理論知識為基礎(chǔ),結(jié)合空間調(diào)制、預(yù)編碼、線性分組碼和天線選擇等技術(shù),設(shè)計了誤碼性能更好的MIMO系統(tǒng)。本文設(shè)計的輔助天線協(xié)助發(fā)送碼字的空間調(diào)制MIMO系統(tǒng),并在瑞利衰落信道下計算了該MIMO系統(tǒng)的容量。仿真實驗得出的系統(tǒng)誤碼率曲線表明:在功耗相同時輔助天線協(xié)助空間調(diào)制MIMO系統(tǒng)和傳統(tǒng)的SM-MIMO系統(tǒng)相比,當(dāng)誤碼率為410-時,有約4.8dB的增益。
[Abstract]:With the development of wireless communication and the increase of mobile phones, providing users with ubiquitous high-quality communication services is the fundamental driving force for the development of wireless communication technology, but the wireless spectrum resources are limited. Scarcity makes it possible to explore high-speed and reliable communication systems. It has become a hot and difficult topic in the field of wireless communication. Multiple Input Multiple Output. As the core technology of the next generation wireless communication field, Mimo technology is compared with the traditional single input and single output Input Single Output. SISO technology has better performance than MIMO systems with the same configuration, power consumption and spectrum bandwidth, due to the configuration of multiple transmit and receive antennas in large scale MIMO systems. In order to reduce the computational complexity of the receiver detection, the complexity of detection is greatly increased. At the same time, the diversity gain is not lost. This paper designs a MIMO system based on MMSE precoding space modulation. When the receiver knows the channel state information, it selects the appropriate receiving antenna to receive the data. This not only guarantees the diversity gain of the system, but also reduces the detection complexity of the system. Spatial modulation spatial Modulation. SMtechnology uses the traditional modulation symbols to carry information, and also uses the space position of the transmitting antenna to carry the information. Therefore, the SM system can use fewer antennas. In order to improve the BER performance of SM-MIMO communication system, this paper presents a scheme of MIMO system using linear block codes to design the transmit antenna constellation diagram in order to improve the BER performance of SM-MIMO communication system. 2) two groups of transmit antenna constellations with minimum code distances of 2 and 3 are designed for example. The simulation results show that the transmission power of the multi-antenna communication system designed in this paper is lower than that of the literature when the transmission rate is the same. [In order to further improve the error performance of MIMO communication system, the hardware cost is saved by using fewer transmission links. Based on the existing theoretical knowledge, this paper combines spatial modulation, precoding, linear block codes and antenna selection techniques. The MIMO system with better BER performance is designed. The auxiliary antenna is designed in this paper to assist in the spatial modulation MIMO system of code word transmission. The capacity of the MIMO system is calculated in Rayleigh fading channel. At the same power consumption, the auxiliary antenna assists the spatial modulation MIMO system compared with the traditional SM-MIMO system. When the BER is 410 -, the gain is about 4.8 dB.
【學(xué)位授予單位】：五邑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN919.3

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本文編號：1425483