Diversity space-time modulation for MIMO wireless communication systems with fading channels

最近信息时代的到来在我们的社会中产生了对知识和信息交流的爆炸性需求。这种需求引发了无线通信的巨大扩展，其中遇到了严峻的技术挑战，包括需要在分散丰富的环境中以高速率传输语音、数据和视频。无线通信系统的最新发展是多输入多输出(MIMO)无线链路，由于其在应对衰落信道以及功率和带宽限制所带来的挑战方面的潜力，已经成为一个非常重要的研究领域。MIMO通信的重要性在于它们能够提供比单天线系统显著增加的容量。为了充分利用MIMO通信信道，对抗衰落和串扰，提出了一种空时分组码(STBC)，其方法是使发射机天线间隔足够大，并为分布在发射机天线(空间)和符号周期(时间)上的发射符号引入一个编码。该方案提出的研究计划是为MIMO无线通信系统开发一流的研究和训练环境。该方案旨在建立一种新的理论，并解决以下三个开放和具有挑战性的问题：(1)具有最优相干接收的MIMO系统的最优空时分组码的设计(即，在接收端已知信道信息)；(2)具有简单相干接收的多输入单输出系统的最优空时分组码的设计。这样的设计在移动下行链路通信中通常是有用的；(3)当信道信息完全不可用时，用于唯一识别MIMO衰落信道的STBC的系统设计。拟议的研究计划将创造一个基本的研究和培训环境，适当地向高素质人员(HQP)传授必要的技能，这些人员将满足加拿大学术界和无线通信行业的需求。该项目将吸引世界上有才华和经验的研究人员和总部，并将他们留在加拿大。

The recent arrival of the Information Age has created an explosive demand for knowledge and information exchange in our society. This demand has triggered off an enormous expansion in wireless communications in which severe technical challenges, including the need of transmitting speech, data and video at high rates in an environment rich of scattering, have been encountered. A recent development in wireless communication systems is the multi-input multi-output (MIMO) wireless link which, due to its potential in meeting these challenges caused by fading channels together with power and bandwidth limitations, has become a very important area of research. The importance of MIMO communications lies in the fact that they are able to provide a significant increase in capacity over a single antenna system. To take advantage of the MIMO communication channel and combat fading and cross-talk, a space-time block code (STBC) has been developed by spacing the transmitter antennas sufficiently and introducing a code for the transmitted symbols distributed over transmitter antennas (space) and symbol periods (time). The research program presented in this proposal is to develop a first-rate research and training environment for the MIMO wireless communication systems. The proposal aims at establishing a novel theory and solving the following three open and challenging problems: (1) The design of an optimal STBC for the MIMO systems with the optimal coherent receiver (i.e., the channel knowledge is available at the receiver); (2) The design of an optimal STBC for multi-input single-output systems with simple coherent receivers. Such a design is often useful in mobile downlink communications; (3) The systematic design of a STBC for the unique identification of the MIMO fading channels when channel information is completely unavailable. The proposed research program will create an essential research and training environment appropriate to impart requisite skills to highly qualified personnel (HQP) who will fulfill the needs of Canadian academia and wireless communication industries. The program will attract talented and experienced researchers and HQP in the world and retain them in Canada.