A SARS MULTIBAND SPECTRUM SENSING METHOD IN WIDEBAND COMMUNICATION SYSTEMS USING RSG

摘要

This paper introduces a multiband spectrum sensing methodthat can accomplish the sensing task using sampling ratesconsiderably lower than the ones demanded by the uniformsampling-based techniques. It utilises nonuniform samplingin conjunction with an appropriate spectral analysis tool.The approach is referred to as Spectral Analysis of RandomizedSampling (SARS), namely for the Random Sampling onGrid (RSG) scheme. The statistical characteristics of theadopted periodogram-type estimator are presented and theeffects of the cyclostationary nature of the processed communicationsignals on SARS are addressed. Reliability guidelinesthat ensure the credibility of the sensing procedure amida sought system performance are derived. Unlike a numberof previously reported nonuniform sampling schemes e.g.Total Random Sampling (TRS), the RSG provides safeguardsmaking it more suitable for implementation in hardware.Numerical examples testify the presented analytical results.