Mobile Communications and Networking: Low Power/Complexity Transceivers for Adaptive Integrated Wireline-Wireless Multimedia Transmissions

9979443 giannakis新兴的宽带无线网络对多媒体信息的传播要求越来越高，速率也越来越可变。有线-无线网络的集成、便携设备的尺寸和低功耗限制、用户移动性和信道传播效应对宽带通信构成了主要挑战。码分和多载波系统提供了两种具有巨大潜力的多址方案来应对这些挑战，前提是在多径传播和多用户干扰存在的情况下，它们的互补优势和性能限制得到解决。PI建议开发和分析用于宽带无线移动通信的最佳通用多载波码分多址（MC-CDMA）系统。具体来说，他们采用了一个全局系统视图，该视图结合了受功耗和网络限制的自适应、可扩展和健壮的联合源/信道编码和多址技术。他们灵活的通用MC-CDMA预编码器设计保证了简单线性接收器的完美干扰消除，并且对信道衰落效果具有鲁棒性。基础研究、算法和分析性能评估辅以毫米波软件无线电试验台的实验验证。该实验设施还将与明尼苏达大学和当地工业界的忠实合作者加强学生培训和多学科研究与开发

9979443GiannakaisEmerging broadband wireless networks for multimedia information dissemination demand increasingly higher and variable rates. The integration of wireline-wireless networks, the size and low-power limitations in portable units, user mobility, and channel propagation effects pose major challenges to wideband communications. Code division and multicarrier systems offer two multiple access schemes with great potential to cope with these challenges, provided that their complementary advantages and performance limitations, in the presence of multipath propagation and multiuser interference, are addressed.The PI's propose to develop and analyze an optimal generalized multicarrier code division multiple access (MC-CDMA) system for broadband wireless mobile communications. Specifically, they take a global system view that incorporates adaptive, scalable and robust joint source/channel coding and multiple access techniques subject to power consumption and networking constraints. Their flexible generalized MC-CDMA precoder designs guarantee perfect interference elimination with simple linear receivers and are robust to channel fading effects.Basic research, algorithms, and analytical performance evaluations are complemented by experimental validation with a millimeter-wave software radio testbed. The experimental facility will also foster enhanced student training and multidisciplinary research and development with committed collaborators at the University of Minnesota and the local industry.***