One of the foremost critical design problems in cognitive radios is the need to process wide bandwidth and reliably detect the presence of primary users. This places significant requirements on sensitivity, dynamic range and linearity of the RF front-end. In order to counter effects of different adverse scenario of sensing channel it is necessary to perform distributed measurements to detect the primary user with high reliability. This paper presents the architecture of a sensing probe for wideband measurement and distributed measurement method to measure, characterize and model the utilization of the spectrum. Here, we have presented the sample spectrum measurement result using described sensing probe in cellular band.
认知无线电中最重要的关键设计问题之一是需要处理宽带宽并可靠地检测主要用户的存在。这对射频前端的灵敏度,动态范围和线性度提出了重要要求。为了抵消感测信道的不同不利情形的影响,有必要执行分布式测量以高可靠性检测主要用户。本文提出了一种用于宽带测量的传感探头的架构,以及一种用于测量,表征和建模频谱利用率的分布式测量方法。在这里,我们介绍了使用所述传感探针在细胞频带中的样品光谱测量结果。 P>
Stevens Institute of Technology;
Lucent Bell Laboratories;
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