Integrated Design of Next-Generation Broadband Mobile Networks: Antennas, Codes, and Performance Guarantees

目前设想的第三代无线通信网络将比目前的系统提供明显的改进，但将达不到随时随地为各种服务提供无缝通信的目标。由于这一目标提出了跨越几个学科的巨大科学和技术挑战，涉及多个研究人员的多学科、综合研究方法具有显著的意义。因此，我们的研究将由四名研究人员进行，他们的背景是电磁学、信号处理和编码以及网络。这项研究将推进这些“层”中每一层的技术水平，但也将探索每一层如何使其他层受益。射频层的工作将涉及设计具有单天线和多天线结构的低轮廓、低功率宽带天线。为了信令层的利益，还研究了传播环境的统计和时间模型。在信令层的研究将包括针对频率选择性和平坦衰落信道的串行级联和并行级联的设计。串行级联码和并行空时级联码也将被设计用于具有发射分集的系统。将采用教科书上的信道模型以及在射频层工作中开发的模型。在网络层，工作将涉及服务质量度量的性能分析、在线带宽分配机制以及在服务质量保证下的自适应差错控制。这一层的操作将得到信令层提供的数据的帮助。这项研究是合作的，包括亚利桑那大学的四名研究人员和来自行业的成员。

The currently envisaged third-generation wireless communication networks will provide clear improvements over the current systems, but will fall short of the goal of seamless communication for a large variety of services anywhere and anytime. Because the goal presents tremendous scientific and technological challenges spanning several disciplines, a multi-disciplinary, integrative research approach involving several researchers makes eminent sense. As such, our research will be conducted by four researchers whose backgrounds are in electromagnetics, signal processing and coding, and networking. The research will advance the state of the art in each of these "layers," but will also explore how each of the layers might benefit the other layers.Work at the RF Layer will involve the design of low-profile, low-power broadband antennas, with single and multiple antenna structures. Also studied for the benefit of the Signaling Layer are statistical and temporal models of the propagation environment. Research at the Signaling Layer will include the design of serial and parallel concatenations will be studied for both frequency selective and flat fading channels. Serial and parallel space-time concatenated codes will be designed also for systems with transmit diversity. Both textbook channel models as well as models developed in the RF Layer work will be adopted. At the Network Layer, work will involve performance analysis of quality of service metrics, on-line bandwidth allocation mechanisms, and adaptive error control under quality of service guarantees. Operation at this layer will be aided by data provided by the Signaling Layer. The research is collaborative, including the four University of Arizona researchers and members from industry.