Integrative Design of Broadband MIMO Wireless Transceivers and Spectrally Efficient Retransmission Diversities

本研究计划探讨在宽频多输入多输出（MIMO）无线通讯中，高效整合收发器与重传分集的设计、分析与实作。MIMO技术和自动重复请求（ARQ）协议的开发和利用一直是无线研究的热门课题。混合ARQ可以有效地防止无线通信中的数据包错误，而MIMO收发器已经在无线物理层证明了显著的性能提升。然而，传统的方法将无线网络中的MIMO和ARQ视为独立的机制。混合ARQ协议与MIMO收发器的设计集成已经得到了很少的报道，并没有得到很好的利用。随着越来越多的主流产品开始在无线局域网和其他无线系统中采用MIMO技术，迫切需要开发和实现集成无线ARQ和MIMO设计所提供的全部潜在优势。本课题主要研究宽带MIMO物理层与ARQ的有效集成。同时考虑到ARQ协议和MIMO收发器的设计，本项目的研究具有系统性、集成性和广泛的适用性。与传统的无线设计不同，ARQ和MIMO技术是分开处理的，这种综合设计方法为开发未来的先进无线系统打开了一扇新的大门，该系统具有功率和带宽效率。虽然跨层优化的优势是众所周知的，但ARQ协议及其相应的MIMO收发器的集成设计为跨层网络设计提供了具体可行的方法。着眼于带宽和功率效率，该项目的目标是优化和适应MIMO无线系统的ARQ（自动重复请求）协议，以提高性能和可扩展性。为了更好地利用ARQ重发分集，提出了新的渐进式MIMO预编码容量分析和收发器优化方法。研究人员开发了带宽和功率效率高的收发器技术设计，与新的可扩展ARQ设计完全集成，以显着提高最终用户应用的性能。该项目的结果提供了无线MIMO信道估计算法的新公式，特别是为未来宽带无线通信系统中的带宽高效和可扩展的混合ARQ协议量身定制。

This research project investigates the design, analysis, and implementation of resource efficient integrative transceivers and retransmission diversity in broadband multi-input-multi-output (MIMO) wireless communications. The development and exploitation of MIMO technologies and Automatic Repeat reQuest (ARQ) protocols have been popular subjects of wireless research. Hybrid ARQ is effective as protection against packet error in wireless communications, while MIMO transceivers have demonstrated significant performance gains at the wireless physical layer. However, traditional approaches treat MIMO schemes and ARQ as independent mechanisms in wireless networks. The design integration of hybrid ARQ protocols with MIMO transceivers has received scant coverage and has not been well utilized. As more and more mainstream products begin to adopt MIMO technologies in wireless LAN and other wireless systems, there is an urgent need to exploit and achieve the full potential benefit offered by integrating wireless ARQ and MIMO designs. This research project investigates the efficient integration of ARQ with broadband MIMO physical layer.Simultaneously considering both designs of ARQ protocols and MIMO transceivers, the investigations of this project are systematic, integrative, and broadly applicable. Unlike in traditional wireless designs where ARQ and MIMO technology are treated separately, this integrative design approach opens a new door to developing future advanced wireless systems that are power and bandwidth efficient. While the advantages of cross-layer optimization are well known, the integrative design of ARQ protocols and their corresponding MIMO transceivers provides a concrete and tangible approach to cross-layer network design. Focusing on bandwidth and power efficiency, the project goal is to optimize and adapt ARQ (Automatic Repeat reQuest) protocols for MIMO wireless systems to improve performance and scalability. The research presents new capacity analysis and transceiver optimization of progressive MIMO precoding to better exploit the ARQ retransmission diversity. The investigators develop design of bandwidth and power efficient transceiver technologies in full integration with new scalable ARQ designs to significantly improve the performance of end user applications. The results of this project provide new formulation of wireless MIMO channel estimation algorithms particularly tailored for bandwidth efficient and scalable hybrid ARQ protocols in future broadband wireless communication systems.