多址接入技术决定了用户进入网络、占用资源的具体方式，是整个移动通信研究领域的重要组成部分。非正交的多址方式在信息论上可以达到容量域的帕累托最优，因此更具发展潜力。面对下一代移动通信系统更大用户数目、更高频谱效率的要求，本项目拟围绕交织多址（IDMA）技术，展开对下一代移动通信中非正交多址接入理论与关键技术的研究。项目研究的最终目标是建立以“MIMO-OFDM-IDMA”为核心的下一代多用户通信技术理论体系。基于此，本项目将重点研究：MIMO-OFDM-IDMA网络可达容量区域理论；发送-接收信号的关键传输与处理技术；以及功率域、频谱域、用户域的三维资源优化管理策略等三方面内容。项目研究跨越了基础理论、关键技术、以及资源管理三个层面，预期成果将有助于拓宽IDMA相关研究领域，也可为下一代移动通信系统提供可行的技术解决方案。

Multiple Access technique is considered as one of the key research areas in wireless mobile communications, as it determines the way by which the multiple users could connect to the same network and share its capacity. According to the information theory, non-orthogonal multiple access (NOMA) is the one who can reach the Pareto Optimal of the network capacity region, and hence has been recognized as the better choice for future wireless communications. With such a statement born in mind, in this project we will perform a comprehensive study on the NOMA schemes, aiming at satisfying the demands, such as larger number of users and higher spectral efficiency, of next generation wireless mobile communications. More specifically, we focus on the fundamental theories and key technologies of Interleave Division Multiple Access (IDMA); one promising kind of NOMA scheme proposed recently. The objective of this project is to establish the general framework for the future multi-user communication system, with MIMO-OFDM-IDMA as the fundamental air-interface. To achieve that, efforts will be made from three perspectives, i.e., the achievable capacity region for the MIMO-OFDM-IDMA network, the key transmission and signal processing techniques in the transceiver design, and the optimal resource management with the joint consideration of power allocation, sub-channel assignment and user grouping. Through the research exploration from the aspects of fundamental theory, key techniques, as well as optimal resource management of MIMO-OFDM-IDMA, we expect to deliver some create ideas, which could not only broaden the IDMA related research areas, but also provide feasible solutions to the next generation wireless mobile communications.