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

本研究项目研究宽带多输入多输出(MIMO)无线通信中资源高效的综合收发信机和重传分集的设计、分析和实现。MIMO技术和自动重传请求(ARQ)协议的开发和利用一直是无线研究的热门课题。混合ARQ是无线通信中防止分组错误的有效保护，而MIMO收发器在无线物理层显示出显著的性能提升。然而，在无线网络中，传统的方法将MIMO方案和ARQ作为独立的机制。混合ARQ协议与MIMO收发器的设计集成得到的报道很少，也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无线ARQ和MIMO设计相结合所提供的全部潜在好处。本课题研究ARQ与宽带MIMO物理层的有效融合，同时考虑ARQ协议和MIMO收发信机的设计，具有系统性、综合性和广泛的适用性。与ARQ和MIMO技术分开处理的传统无线设计不同，这种集成设计方法为开发未来功率和带宽高效的先进无线系统打开了一扇新的大门。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收发器的一体化设计为跨层网络设计提供了一种具体而有形的方法。该项目以带宽和功率效率为重点，旨在优化和调整适用于MIMO无线系统的ARQ(自动重传请求)协议，以提高性能和可扩展性。为了更好地利用ARQ重传分集，研究提出了一种新的渐进MIMO预编码的容量分析和收发信机优化。研究人员开发带宽和功率高效收发器技术的设计，与新的可扩展ARQ设计完全集成，以显著提高终端用户应用的性能。本项目的研究结果为未来宽带无线通信系统中的无线MIMO信道估计算法提供了新的公式，特别是为带宽高效和可扩展的混合ARQ协议量身定做。

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.