本文選題：廣義空間調(diào)制 + 信號(hào)檢測(cè)　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：空間調(diào)制(Spatial Modulation,SM)技術(shù)被認(rèn)為是一種未來移動(dòng)網(wǎng)絡(luò)中充滿前景的新型MIMO傳輸技術(shù)。該技術(shù)能夠以高功效低復(fù)雜度滿足給定吞吐量要求,有效減少發(fā)射機(jī)射頻鏈路(Radio Frequency,RF)數(shù)量。廣義空間調(diào)制(Generalized Spatial Modulation,GSM)技術(shù)是空間調(diào)制技術(shù)的一種延伸。相較于空間調(diào)制,廣義空間調(diào)制在每個(gè)符號(hào)時(shí)間激活的天線不止一根,雖然提高了傳輸速率但是也使信號(hào)的檢測(cè)更加復(fù)雜。本文在介紹空間調(diào)制工作原理的基礎(chǔ)上,歸納分析了空間調(diào)制技術(shù)的兩大優(yōu)點(diǎn),即對(duì)射頻鏈路的簡(jiǎn)化和頻譜效率的提高。對(duì)空間調(diào)制尚存在的問題以及未來的發(fā)展進(jìn)行了探討。對(duì)于發(fā)射天線數(shù)量小于接收天線數(shù)量的超定系統(tǒng)中的廣義空間調(diào)制,給出了格基規(guī)約輔助的線性檢測(cè)的一般步驟。針對(duì)格理論對(duì)發(fā)射向量特殊的連續(xù)整數(shù)格點(diǎn)要求,提出了一種兼容性的8-QAM星座圖,解決了格基規(guī)約輔助的線性檢測(cè)與廣義空間調(diào)制的兼容性問題。針對(duì)采用此8-QAM星座圖的廣義空間調(diào)制,證明了此方法能夠達(dá)到滿接收分集。針對(duì)格基規(guī)約算法復(fù)雜度難于精確計(jì)算的問題,提出一種近似的復(fù)雜度計(jì)算方法。通過BER性能仿真,驗(yàn)證了所提8-QAM在格基規(guī)約輔助的線性檢測(cè)中相較于對(duì)比4-QAM和對(duì)比8-QAM的優(yōu)勢(shì),單符號(hào)系統(tǒng)和多符號(hào)系統(tǒng)都能達(dá)到滿接收分集以及此方法對(duì)相關(guān)性信道的健壯性。復(fù)雜度的仿真表明格基規(guī)約帶來的運(yùn)算量的增加基本可以忽略。對(duì)于發(fā)射天線數(shù)量大于接收天線數(shù)量的欠定系統(tǒng)中的廣義空間調(diào)制,運(yùn)用壓縮感知(Compressive Sensing)的信號(hào)恢復(fù)算法,基于已有的基于經(jīng)典的正交匹配追蹤(Orthogonal Matching Pursuit,OMP)算法的增強(qiáng)型OMP檢測(cè)方法,本文提出一種增強(qiáng)型分段正交匹配追蹤(Stagewise Orthogonal Matching Pursuit,StOMP)檢測(cè)方法,以一定誤碼率性能損失為代價(jià),可以進(jìn)一步降低檢測(cè)復(fù)雜度。針對(duì)增強(qiáng)型正交匹配追蹤算法存在的“錯(cuò)誤地板”現(xiàn)象,又結(jié)合排序塊最小均方誤差(Ordered Block Minimum Mean-Squared Error,OB-MMSE)算法,提出一種基于正交匹配追蹤的排序塊最小均方誤差算法。相較于OB-MMSE方法,仿真表明該方法在復(fù)雜度略微增加情況下,使得誤碼率性能有所提升。
[Abstract]:Spatial Modulation (SM) technology is considered to be a promising new MIMO transmission technology in future mobile networks. This technique can satisfy the requirement of given throughput with high efficiency and low complexity, and reduce the number of radio frequency radio frequency (RF) of transmitter RF link effectively. Generalized Spatial Modulation (GSM) technology is an extension of spatial modulation technology. Compared with spatial modulation, generalized spatial modulation activates more than one antenna at each symbol time, which improves the transmission rate but also makes the detection of signals more complicated. On the basis of introducing the working principle of spatial modulation, two advantages of spatial modulation are summarized and analyzed in this paper, that is, the simplification of RF link and the improvement of spectral efficiency. The existing problems and future development of spatial modulation are discussed. For generalized spatial modulation in overdetermined systems with a number of transmitting antennas less than the number of receiving antennas, the general steps of linear detection assisted by the lattice basis protocol are given. A compatible 8-QAM constellation diagram is proposed to solve the compatibility problem between linear detection and generalized spatial modulation (GSM). For the generalized spatial modulation of the 8-QAM constellation, it is proved that this method can achieve full reception diversity. In order to solve the problem that it is difficult to calculate the complexity of lattice-based reduction algorithm, an approximate complexity calculation method is proposed. Through BER performance simulation, it is verified that the proposed 8-QAM can achieve full reception diversity in comparison with 4-QAM and 8-QAM in linear detection assisted by lattice-protocol, and the robustness of the proposed method to correlated channels can be achieved by both single-symbol system and multi-symbol system. The simulation of complexity shows that the increase of computation brought by lattice-base protocol can be neglected. For generalized spatial modulation in underdetermined systems with more transmitting antennas than receiving antennas, an enhanced OMP detection method based on classical orthogonal Matching pursuit (orthogonal Matching pursuit) algorithm is proposed. In this paper, an enhanced segmented orthogonal matching tracking (StageWise Orthogonal Matching pursuit Stomp) detection method is proposed, which can further reduce the detection complexity at the cost of a certain bit error rate (BER) performance loss. Aiming at the phenomenon of "wrong floor" in enhanced orthogonal matching tracking algorithm, and combining the ordered Block Minimum Mean-Squared error OB-MMSE algorithm, a sort block minimum mean square error algorithm based on orthogonal matching tracking is proposed. Compared with the OB-MMSE method, the simulation results show that the proposed method can improve the bit error rate (BER) performance with a slight increase in complexity.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN911.3

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本文編號(hào)：1799662