{"title":"In-band interference of multi-band OFDM systems","authors":"C. Corral, S. Emami, G. Rasor","doi":"10.1109/ISSSTA.2004.1371809","DOIUrl":null,"url":null,"abstract":"The impact of time-frequency hopped multi-band orthogonal frequency division multiplexing (MB-OFDM) on in-band wideband receivers is considered. First, we compare direct-sequence and frequency-hopped ultra-wideband (UWB) systems in terms of power and range characteristics. We then show that in-band receivers with large bandwidths are susceptible to UWB systems, but direct sequence systems are potentially less harmful due to the large relative bandwidth. The MB-OFDM signal introduces less interference for long hop lengths, but the signal peak-to-average power rises. This makes the MB-OFDM signal appear impulsive to a victim receiver, causing destructive interference at high signal-to-noise ratios.","PeriodicalId":340769,"journal":{"name":"Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2004-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISSSTA.2004.1371809","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
The impact of time-frequency hopped multi-band orthogonal frequency division multiplexing (MB-OFDM) on in-band wideband receivers is considered. First, we compare direct-sequence and frequency-hopped ultra-wideband (UWB) systems in terms of power and range characteristics. We then show that in-band receivers with large bandwidths are susceptible to UWB systems, but direct sequence systems are potentially less harmful due to the large relative bandwidth. The MB-OFDM signal introduces less interference for long hop lengths, but the signal peak-to-average power rises. This makes the MB-OFDM signal appear impulsive to a victim receiver, causing destructive interference at high signal-to-noise ratios.
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