Spatial Modulation

空间调制

• 批准号: EP/G011788/1
• 负责人: Harald Haas
• 金额: $ 39.33万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FG011788%2F1
• 关键词: Spatial; Modulation

It is accepted that multiple antenna techniques can significantly improve link spectral efficiency. However, most of the technologies using multiple antennas require complex algorithms in order to eliminate inter-channel interference (ICI) which stems from simultaneous transmissions in spatial multiplexing systems. This renders the practical implementation difficult, especially in mobile stations, as the necessary digital signal processing requires significant energy. However, due to the clear advantages of MIMO techniques it must be a clear research goal to develop new approaches to multiple antenna transmission in order to mitigate the practical limitations while retaining the key advantages. Here, we introduce such entirely new approach which avoids ICI completely while still allowing for the exploitation of spatial multiplexing gains. The basic principle is that, in analogy to digital modulation schemes such as QAM (quadrature amplitude modulation), the multiple antenna array at the transmitter is considered as a spatial constellation diagram . As in QAM where every constellation point corresponds to a certain information sequence (symbol), every antenna corresponds to a unique information sequence, and is activated if the incoming information sequence matches that sequence. As a consequence, the location of the antenna carries information. In other words, a single valued signal, for example, a pure sinusoidal frequency carrier signal transmitted from an antenna of an antenna array conveys actual information provided that the receiver can detect where the actual signal originated from (detection of the actual antenna that transmitted signal energy). The proposed novel fundamental principle of implicit information transmission has implications on several key research areas in wireless communications systems such as on digital modulation, signal processing at the transmitter and the receiver, link and system capacity evaluation and wireless systems operation. For example, the mere fact that the location of an antenna conveys information implicitly makes an investigation of channel capacity in such systems imperative. Moreover, it opens avenues for a new class of adaptive modulation algorithms which takes into account the spatial constellation diagram , effectively resulting in three-dimensional adaptive modulation algorithms (the complex signal plane as used in state-of-the-art digital modulation plus the spatial constellation domain). Furthermore, adjustments are required to conventional communication systems, such as the addition of a new logical block at the receiver - namely, the antenna detection. Algorithms for such antenna detection, given the various radio propagation environments, have to be developed. The novel concept also has implications on the operation of wireless systems. For instance, the concept of virtual antenna arrays is well described in the literature. Such virtual antenna array, for example, exists in ad hoc networks where every node is equipped with one antenna. Multiple nodes (a subset of such nodes) can be considered as a virtual antenna array. This concept can now be combined with the new principle of spatial modulation to mitigate the multihop burden in ad hoc networks. In this research the key observation/discovery that the physical location of a transmitting antenna array carries information, will be further explored. This includes studies on the physical layer (link level) as well as studies on system level (in particular ad hoc and cellular systems). Our IEEE Trans. On Vehic. Techno. paper entitled Spatial Modulation (to appear in the first half of 2008) showcases our initial work on the topic and its potential. This proposal is to take advantage of our leading position to further develop the theory, algorithms, systems concepts as well as robust and low complexity practical implementations.

人们认为，多种天线技术可以显着提高链路光谱效率。但是，大多数使用多个天线的技术都需要复杂的算法，以消除通间干扰（ICI），这源自空间多路复用系统中同时传播。这使实际实施变得困难，尤其是在移动站中，因为必要的数字信号处理需要大量的能量。但是，由于MIMO技术的明显优势，必须是一个明确的研究目标，以开发新的多种天线传输方法，以减轻实际限制，同时保留关键优势。在这里，我们介绍了这种全新的方法，该方法完全避免了ICI，同时仍允许剥削空间多路复用。基本原理是，类似于数字调制方案，例如QAM（正交振幅调制），发射器的多个天线阵列被认为是空间星座图。如QAM所示，每个星座点对应于某个信息序列（符号），每个天线对应于唯一的信息序列，并且如果输入信息序列匹配该序列，则会激活。结果，天线的位置带有信息。换句话说，例如，从天线阵列的天线传递的纯正弦频率载体信号传达了实际信息，规定接收器可以检测到实际信号的位置（检测传输信号能量的实际天线）。拟议的新型内隐信息传输的基本原理对无线通信系统中的几个关键研究领域具有含义，例如数字调制，发射器和接收器的信号处理，链接和系统容量评估以及无线系统操作。例如，天线的位置传达信息隐含地调查了此类系统势在必行的通道容量，这一事实就是事实。此外，它为新的自适应调制算法开辟了途径，该算法考虑了空间星座图，有效地导致了三维自适应调制算法（在最新的数字调制中使用的复杂信号平面以及空间星座域）。此外，需要调整常规通信系统，例如在接收器处添加新的逻辑块 - 即天线检测。考虑到各种无线电传播环境，必须开发此类天线检测的算法。新颖的概念也对无线系统的运行有影响。例如，文献中很好地描述了虚拟天线阵列的概念。例如，这种虚拟天线阵列存在于每个节点配备一个天线的临时网络中。多个节点（此类节点的子集）可以视为虚拟天线阵列。现在，可以将此概念与空间调制的新原则结合使用，以减轻临时网络中的多台面负担。在这项研究中，将进一步探索传输天线阵列的物理位置的关键观察/发现将进一步探讨。这包括对物理层（链路级别）的研究以及系统级别（尤其是临时和细胞系统）的研究。我们的IEEE Trans。在车辆上。技术。纸质题为“空间调制”（出现在2008年上半年）展示了我们关于该主题及其潜力的最初工作。该建议是利用我们的领先地位，进一步发展理论，算法，系统概念以及稳健和低复杂性的实际实现。

项目成果

On the Performance of Space Shift Keying (SSK) Modulation with Imperfect Channel Knowledge

不完全信道知识下的空移键控（SSK）调制性能研究

• DOI: 10.48550/arxiv.1107.4922
• 发表时间: 2011
• 作者: Di Renzo M

On the performance of Space Shift Keying MIMO systems over correlated Rician fading channels

• DOI: 10.1109/wsa.2010.5456378
• 发表时间: 2010-04
• 期刊: 2010 International ITG Workshop on Smart Antennas (WSA)
• 作者: M. Renzo;H. Haas