基于天线波束方向图的MIMO空间调制

发布时间：2018-05-21 15:19

本文选题：多输入多输出 + 空间调制　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：近些年,移动通信技术进入飞速发展的时期,通信系统正朝着更好的速率与质量的方向发展以满足人们日益增长的需求。空间调制(Spatial Modulation,SM)作为一种很有发展潜力的新型调制技术,成为5G技术中的研究热点。本文的主要研究工作如下:(1)在空间调制的背景下,研究一种新型的空间调制方案,天线波束方向图调制(ABPM),利用发射天线阵列所产生的不同波束方向图来传递信息。这种调制方案,可以提高信息传递的效率并且达到更强的鲁棒性。这种波束方向图调制不同于传统的空间调制的地方在于,传递的信息不仅包含传统的调制符号,还包括由天线权重所决定的天线发射波形信息。该方案的研究将进一步推动空间调制的发展,使其不仅仅局限于对单根天线选择的调制方法,进而进一步提升MIMO无线通信的性能。本文首先研究了ABPM调制的原理,然后对ABPM的误码率进行了分析,最后进行了仿真验证。仿真结果表明,天线波束方向图调制在误码率性能上优于传统的SM调制,在10-2的误码率条件下ABPM调制的误码率性能比SM调制提升了10dB,通过对不同天线方向图集合的ABPM调制进行仿真,可以看到,当集合中天线方向图之间的相关性越小时,系统的误码率越低。(2)当接收机位于发射机不同波瓣的交叉区域时,ABPM调制方式在误码率方面优于传统的空间调制。但考虑到接收机位于几个波瓣交叉区域的概率较低,因此ABPM调制方式的应用存在局限性。针对这个问题,本文在方向图综合算法—Woodword Lawson算法的基础上,提出了余弦方向图方法M-CBPM,它克服了ABPM调制方式的局限性,与传统的空间调制技术相比,新的方向图设计方法在发射天线多于接收天线的系统中具有更低的误码率和更高的信息速率。仿真结果表明,M-CBPM在误码率性能上仍然优于SM调制,并且在通信速率上较ABPM具有很大的优势,而且在移动通信系统中具有较高的可行性。
[Abstract]:In recent years, with the rapid development of mobile communication technology, the communication system is developing towards better speed and quality to meet the increasing demand of people. Spatial Modulation (SM), as a new modulation technology with great potential, has become a research hotspot in 5G technology. The main work of this paper is as follows: (1) under the background of spatial modulation, a new spatial modulation scheme, the antenna beam pattern modulation (ABPM), is studied, and the information is transmitted by using the different beam pattern generated by the transmitting antenna array. This modulation scheme can improve the efficiency of information transmission and achieve stronger robustness. This beam-pattern modulation is different from the traditional spatial modulation in that the transmitted information includes not only the traditional modulation symbols but also the antenna transmitting waveform information which is determined by the antenna weight. The research of this scheme will further promote the development of spatial modulation, and make it not only limited to the modulation method selected for single antenna, but also improve the performance of MIMO wireless communication. In this paper, the principle of ABPM modulation is studied, then the bit error rate of ABPM is analyzed, and the simulation is carried out. Simulation results show that the BER performance of antenna beam pattern modulation is better than that of traditional SM modulation. Under the condition of 10-2 bit error rate, the BER performance of ABPM modulation is 10 dB higher than that of SM modulation. Through the simulation of ABPM modulation of different antenna pattern sets, it can be seen that when the correlation between antenna pattern sets in the set is smaller, The lower the BER of the system, the lower the bit error rate (BER) of ABPM modulation is better than that of traditional spatial modulation when the receiver is located in the crossover region of different lobes of the transmitter. However, the application of ABPM modulation is limited due to the low probability that the receiver is located in several crossover regions. In order to solve this problem, based on the pattern synthesis algorithm-Woodword Lawson algorithm, this paper proposes a cosine pattern map method M-CBPM, which overcomes the limitation of ABPM modulation and is compared with the traditional spatial modulation technology. The new pattern design method has lower bit error rate and higher information rate in systems with more transmitting antennas than receiving antennas. The simulation results show that the BER performance of M-CBPM is still better than that of SM modulation, and it has a great advantage over ABPM in communication rate, and it is more feasible in mobile communication system.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN919.3

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