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

9979443 Giannakais新兴的宽带无线网络对多媒体信息传播的要求越来越高，速率也越来越可变。有线-无线网络的集成、便携设备的大小和低功耗限制、用户移动性和信道传播效应对宽带通信构成了重大挑战。码分多址和多载波系统提供了两种具有巨大潜力的多址接入方案，只要解决了它们在多径传播和多用户干扰下的互补优势和性能限制，PI建议开发和分析适用于宽带无线移动通信的最优广义多载波码分多址(MC-CDMA)系统。具体地说，他们采取了全球系统的观点，结合了自适应、可扩展和健壮的联合信源/信道编码以及受功耗和网络限制的多址技术。其灵活的广义MC-CDMA预编码器设计保证了用简单的线性接收机完美地消除干扰，并且对信道衰落效应具有鲁棒性。基本的研究、算法和分析性能评估通过毫米波软件无线电试验台的实验验证来补充。该实验设施还将促进加强学生培训和与明尼苏达大学和当地行业的坚定合作伙伴进行多学科研究和开发。

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.***