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首页> 外文期刊>IEEE transactions on wireless communications >Low-complexity blind synchronization and demodulation for (ultra-)wideband multi-user ad hoc access
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Low-complexity blind synchronization and demodulation for (ultra-)wideband multi-user ad hoc access

机译：低复杂度盲同步和解调，用于（超）宽带多用户临时访问

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摘要

Synchronization is a performance-critical factor in most communication systems: from classical narrowband and emerging (ultra) wideband (UWB) point-to-point links to cooperative or ad hoc networking, where access must deal with multi-user interference (MUI) and possibly severe intersymbol interference (ISI). For universal applicability to all these scenarios, we develop a blind synchronization and demodulation scheme which relies on intermittent transmission of nonzero mean symbols. These enable MUI- and ISI-resilient timing acquisition via energy detection and low-complexity demodulation by matching to a synchronized aggregate template (SAT). The resultant SAT receiver offers distinct advantages over RAKE, has low-complexity and lends itself naturally to decision-directed enhancements. Its blind operation nicely fits the requirements of multi-user ad hoc access and its ability to handle ISI is particularly attractive for UWB communications. Analytical performance evaluation and simulations testing our novel scheme in UWB settings confirm its high potential for deployment
机译：在大多数通信系统中，同步是性能至关重要的因素：从经典的窄带和新兴的（超）宽带（UWB）点对点链接到协作或自组织网络，其中访问必须处理多用户干扰（MUI）和可能是严重的符号间干扰（ISI）。为了通用适用于所有这些情况，我们开发了一种基于非零均值符号的间歇传输的盲同步和解调方案。这些通过与同步的聚合模板（SAT）匹配，可以通过能量检测和低复杂度解调来实现MUI和ISI弹性定时获取。所得的SAT接收器具有比RAKE明显的优势，具有低复杂度，并且自然地适合于决策导向的增强。它的盲操作非常适合多用户临时访问的要求，其处理ISI的能力对于UWB通信特别有吸引力。分析性能评估和模拟在UWB环境中测试了我们的新方案，证实了其部署的巨大潜力

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