【摘要】：隨著新一代的LTE、4G無線通信技術(shù)的迅猛發(fā)展，MIMO-OFDM系統(tǒng)成為國內(nèi)外的研究熱點。無線通信技術(shù)高速的發(fā)展，導致了多種通信協(xié)議和標準并存，這成為了無線通信進一步發(fā)展的阻礙。軟件無線電技術(shù)是解決上述問題的有效方法之一，該方法依托數(shù)字信號處理器，以軟件方式實現(xiàn)無線通信系統(tǒng)中的各種功能模塊。傳統(tǒng)的標量單核處理器難以滿足軟件無線電應(yīng)用的高密度實時計算需求，基于向量多核處理器實現(xiàn)軟件無線電成為研究的主流方向。 YHFT-Matrix是國防科學技術(shù)大學自主研發(fā)的一款面向軟件無線電的高性能向量多核處理器，針對YHFT-Matrix體系結(jié)構(gòu)特點，軟件實現(xiàn)高效的MIMO-OFDM系統(tǒng)具有重要的理論意義和應(yīng)用價值。 本文主要的工作包括： （1）深入研究了4G通信系統(tǒng)中的MIMO-OFDM技術(shù)，在分析其系統(tǒng)模型的基礎(chǔ)上，提出一種基于YHFT-Matrix平臺的MIMO-OFDM系統(tǒng)設(shè)計與實現(xiàn)方法； （2）設(shè)計與實現(xiàn)了基于YHFT-Matrix平臺的大、小矩陣乘法運算向量化的方法，該方法充分利了YHFT-Matrix對數(shù)據(jù)向量處理的能力。實驗結(jié)果表明，對多個4×4矩陣相乘、一個4×4矩陣同時與多個4×4矩陣相乘和規(guī)模大于16的矩陣相乘的運算，取得了高效的計算性能，同比TIC62X和TIC64X系列芯片，分別獲得了9.4和4.9以上的加速比； （3）深入研究MIMO-OFDM系統(tǒng)中STBC編碼技術(shù)，設(shè)計和實現(xiàn)了基于YHFT-Matrix平臺的2×2和4×4系統(tǒng)的STBC編碼運算方案，，實驗結(jié)果表明，針對同樣的算法功能，同比TIC67X，該方法獲得了8倍的性能加速； （4）深入研究MIMO-OFDM系統(tǒng)中的均衡算法，分別設(shè)計和實現(xiàn)了基于YHFT-Matrix平臺的1×1、2×2和4×4三種天線系統(tǒng)的均衡算法，對2×2、4×4系統(tǒng)分別采用了快速求逆算法和基于分塊矩陣的求逆的方法作映射實現(xiàn)。實驗結(jié)果表明，YHFT-Matrix對均衡運算提供了高效的支持，其中4×4系統(tǒng)的MIMO均衡運算性能相比TIC67X取得40倍的加速。
[Abstract]:With the rapid development of the new generation of LTE,4G wireless communication technology, MIMO-OFDM system has become a research focus at home and abroad. The rapid development of wireless communication technology has led to the coexistence of a variety of communication protocols and standards, which has become an obstacle to the further development of wireless communication. Software radio technology is one of the effective methods to solve the above problems. This method relies on digital signal processor to realize various functional modules in wireless communication system by software. The traditional scalar single-core processor is difficult to meet the high-density real-time computing requirements of software radio applications. The implementation of software radio based on vector multi-core processor has become the mainstream research direction. YHFT-Matrix is a high performance vector multi-core processor for software radio developed by National Defense University of Science and Technology. According to the characteristics of YHFT-Matrix architecture, software implementation of efficient MIMO-OFDM system has important theoretical significance and application value. The main work of this paper is as follows: (1) the MIMO-OFDM technology in 4G communication system is deeply studied, and on the basis of analyzing its system model, a design and implementation method of MIMO-OFDM system based on YHFT-Matrix platform is proposed; (2) the vector quantification method of large and small matrix multiplication operation based on YHFT-Matrix platform is designed and implemented, which fully benefits the ability of YHFT-Matrix to process data vector. The experimental results show that for multiple 4 脳 4 matrices, one 4 脳 4 matrix is multiplied by multiple 4 脳 4 matrices at the same time and the matrix larger than 16 is multiplied at the same time, and the efficient computational performance is obtained. The acceleration ratios of TIC62X and TIC64X series chips are more than 9.4 and 4.9, respectively. (3) the STBC coding technology in MIMO-OFDM system is deeply studied, and the STBC coding operation scheme of 2 脳 2 and 4 脳 4 systems based on YHFT-Matrix platform is designed and implemented. The experimental results show that for the same algorithm function, the performance of this method is 8 times faster than that of TIC67X,. (4) the equalization algorithm in MIMO-OFDM system is deeply studied, and the equalization algorithms of 1 脳 1, 2 脳 2 and 4 脳 4 antenna systems based on YHFT-Matrix platform are designed and implemented respectively. the fast inverse algorithm and the inverse method based on block matrix are used to realize the 2 脳 2 and 4 脳 4 systems, respectively. The experimental results show that YHFT-Matrix provides efficient support for equilibrium operation, in which the performance of MIMO equilibrium operation of 4 脳 4 system is 40 times faster than that of TIC67X.
【學位授予單位】：國防科學技術(shù)大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP332;TN929.53

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