Analysis of UWB system capacity in a realistic multipath environment with coexistence constraints
Analysis of UWB system capacity in a realistic multipath environment with coexistence constraints
复制标题
具有共存约束的现实多路径环境中的 UWB 系统容量分析
DOI：
10.1049/iet-com:20060056
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
F. Mazzenga
中科院分区：
文献类型：
--
作者：
D. Cassioli;R. Giuliano;F. Mazzenga
超宽带(UWB)无线技术预计将在B3G无线系统中发挥关键作用，确保非常高的比特率、低功耗、低成本和定位能力。低成本和高效设备的出现使UWB技术在通信市场上具有很强的竞争力。然而，由于与其他无线电系统共享频谱的必要性，它在全球范围内的接受主要取决于共存问题。研究了在实际多径信道中，由于共存约束对UWB系统容量的影响。在接收端采用部分或选择性Rake合并的UWB系统的链路性能是通过办公楼中UWB室内信道的实验脉冲响应来评估的。利用这些结果，通过半解析方法从中断概率和系统容量两个方面对系统性能进行了评估。关于系统容量的结果解释了当前法规施加的限制，导致我们引入了“共存受限的UWB系统”的概念。
Ultra-wideband (UWB) wireless technology is envisaged to play a key role in B3G wireless systems, guaranteeing very high bit rates, low power consumption, low costs and location capabilities. The availability of low cost and efficient devices makes UWB technology very competitive on the communications market. However, its worldwide acceptance mainly relies on coexistence issues because of the necessity of sharing the spectrum with other radio systems. The reduction, due to coexistence constraints, in the capacity of an UWB system in a realistic multipath channel is investigated. Link performance of an UWB system that exploits either partial or selective Rake combining at the receiver is evaluated over experimental impulse responses of an UWB indoor channel in an office building. Using these results, system performances are evaluated through a semi-analytical procedure in terms of outage probability and system capacity. Results on system capacity account for the limitations imposed by the current regulation, leading us to introduce the concept of ‘UWB systems limited by coexistence’.