{"title":"Design and Realization of a 16 QAM-Modem for a 140 Mb/s Digital Radio System Family","authors":"J. Nossek, H. Barth","doi":"10.1109/EUMA.1983.333305","DOIUrl":null,"url":null,"abstract":"A 16 QAM-modem for 140 Mb/s radio systems is described, with which a spectral efficiency of 3.5 bit/s/Hz is achieved. In the digital signal processing parts extensive use is made of ECL gate arrays. Spectrum shaping according to Nyquist's criterion is performed in the IF with the aid of SAW-bandpass filters (¿ = 0.5). Experimental results obtained with this modem are reported. The incorporation of an adaptive baseband equalizer employing a complex transversal filter is discussed.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"107 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1983 13th European Microwave Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EUMA.1983.333305","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A 16 QAM-modem for 140 Mb/s radio systems is described, with which a spectral efficiency of 3.5 bit/s/Hz is achieved. In the digital signal processing parts extensive use is made of ECL gate arrays. Spectrum shaping according to Nyquist's criterion is performed in the IF with the aid of SAW-bandpass filters (¿ = 0.5). Experimental results obtained with this modem are reported. The incorporation of an adaptive baseband equalizer employing a complex transversal filter is discussed.
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