CAREER: Signal Processing Research in Ultra Wideband Communications

职业：超宽带通信中的信号处理研究

• 批准号: 0238174
• 负责人: Zhi Tian
• 金额: $ 39.94万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0238174&HistoricalAwards=false
• 关键词: CAREER; Signal; Processing; Research; Ultra

Abstract 0238174Zhi Tian Michigan Tech Univ. With the recent release of the Ultra Wideband (UWB) signal spectral mask by the Federal Communications Commission (FCC) in 2002, UWB has emerged as an exciting technology whose ``time has come'' for commercial wireless communications, and local area networking. Conveying information over Impulse-like Radio (IR) waveforms, UWB comes with uniquely attractive features: low-power-density carrier-freetransmissions, ample multipath diversity, low-complexity baseband transceivers, a potential for huge increase in capacity, and the capability to overlay existing RF systems. However, to bring the potencyof IR to fruition, UWB research and development has to cope with formidable challenges that include: high sensitivity to timing the reception of ultra-short pulses, mitigation of fading propagation effects with pronounced frequency-selectivity, low-complexity constraints in decoding high-performance multiple access protocols, and the strict power limitations imposed by the desire to minimize interference between UWB communicators, and co-existing RF systems. This research addresses timely signal processing issues arising in UWB communications, with focuses on: (1) The development of optimal and low-complexity sub-optimal timing epoch estimators along with metrics to assess their performance, and influence on the bit error probability and throughput of UWB systems. (2) The derivation and convergence analysis of low-complexity near-optimal soft-decision based multiuser detectors, and multi-channel equalizers for UWB multiple access protocols. (3) The investigation of overlay issues, modulation schemes, coding, decoding, and interference suppression algorithms to enable UWB spectral mask compatibility, and co-existence with other wireless services. (4) The deployment of multiple transmit-receive antennae to improve performance of low-complexity decoding, timing estimation, and multiuser detection. The outcome of this research will impact the basic theory, design, and deployment of forthcoming multiple access UWB wireless systems.

摘要 0238174田志密歇根理工大学随着美国联邦通信委员会 (FCC) 在 2002 年发布超宽带 (UWB) 信号频谱模板，UWB 已成为一项令人兴奋的技术，其用于商业无线通信和局域网的“时代已经到来”。 UWB 通过类脉冲无线电 (IR) 波形传送信息，具有独特的吸引力：低功率密度无载波传输、充足的多径分集、低复杂性基带收发器、容量大幅增加的潜力以及覆盖现有的射频系统。然而，为了充分发挥红外的潜力，超宽带研究和开发必须应对艰巨的挑战，包括：对超短脉冲接收定时的高灵敏度、通过明显的频率选择性减轻衰落传播效应、低复杂性约束解码高性能多址协议，以及为了最大限度地减少 UWB 通信器和共存 RF 系统之间的干扰而施加的严格功率限制。这项研究解决了 UWB 通信中出现的及时信号处理问题，重点是：（1）开发最优和低复杂度次优定时历元估计器以及评估其性能的指标以及对误码概率和吞吐量的影响UWB 系统。 (2)基于低复杂度近最优软决策的多用户检测器和UWB多址协议的多通道均衡器的推导和收敛分析。 (3) 研究重叠问题、调制方案、编码、解码和干扰抑制算法，以实现 UWB 频谱模板兼容性以及与其他无线服务的共存。 (4)部署多个发射-接收天线以提高低复杂度解码、定时估计和多用户检测的性能。 这项研究的结果将影响即将到来的多址 UWB 无线系统的基本理论、设计和部署。