{"title":"Link adaptation design for interfering cognitive radio with QoS constraints","authors":"M. Taki, F. Lahouti","doi":"10.1109/ICTEL.2010.5478785","DOIUrl":null,"url":null,"abstract":"In this paper, we consider a primary and a cognitive user transmitting over a wireless fading interference channel. Both primary and cognitive links are subject to delay-QoS constraints. The achievable throughput subject to a given delay-QoS constraint can be quantified as the effective capacity of a link. We consider a system in which the primary user transmits with a constant power and utilizes an adaptive modulation and coding (AMC) scheme subject to its required bit error rate (BER). A link (power and rate) adaptation scheme is proposed for the interfering cognitive radio to maximize its effective capacity, while a minimum required effective capacity for the primary user is provisioned. A BER performance requirement and a power constraint are also considered for the cognitive radio. The resulting problem is then cast as a nonlinear discrete optimization problem for which a fast and efficient suboptimum solution is presented. Comparisons with the scheduled (non-interfering) adaptive cognitive transmission demonstrate the efficiency of the proposed interfering transmission scheme.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"136 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 17th International Conference on Telecommunications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICTEL.2010.5478785","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
In this paper, we consider a primary and a cognitive user transmitting over a wireless fading interference channel. Both primary and cognitive links are subject to delay-QoS constraints. The achievable throughput subject to a given delay-QoS constraint can be quantified as the effective capacity of a link. We consider a system in which the primary user transmits with a constant power and utilizes an adaptive modulation and coding (AMC) scheme subject to its required bit error rate (BER). A link (power and rate) adaptation scheme is proposed for the interfering cognitive radio to maximize its effective capacity, while a minimum required effective capacity for the primary user is provisioned. A BER performance requirement and a power constraint are also considered for the cognitive radio. The resulting problem is then cast as a nonlinear discrete optimization problem for which a fast and efficient suboptimum solution is presented. Comparisons with the scheduled (non-interfering) adaptive cognitive transmission demonstrate the efficiency of the proposed interfering transmission scheme.