کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
447496 1443143 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Outage analysis in cooperative cognitive networks with opportunistic relay selection under imperfect channel information
ترجمه فارسی عنوان
تجزیه و تحلیل شکست در شبکه های شناختی همکاری با انتخاب رله فرصت طلب تحت اطلاعات کانال ناقص
کلمات کلیدی
انتخاب رله اپورتونیستی، اطلاعات کانال نامناسب رادیو شناختی، اشباع عملکرد،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
چکیده انگلیسی
This paper proposes exact and limit outage probability expressions for thoroughly evaluating the performance of cooperative cognitive networks with opportunistic relay selection under imperfect channel information, independent and non-identical (i.n.i.) Rayleigh fading channels, maximum transmit power constraint, and interference power constraint. The proposed derivations can be straightforwardly extended to corresponding analysis in dual-hop cognitive networks with opportunistic relay selection to investigate how much performance gain can be achieved from using the direct channel between the source and the destination in relaying communications. Numerous results illustrate significant outage performance degradation and performance saturation due to channel information imperfection but the degradation and saturation level can be remedied by increasing the number of relays. Also, the channel direct brings a considerable performance improvement without any additional expense of system resources such as power and bandwidth. Moreover, channel information imperfection can cause interference power at primary users to exceed a pre-defined level, deteriorating the quality of service of primary users.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: AEU - International Journal of Electronics and Communications - Volume 69, Issue 11, November 2015, Pages 1700-1708
نویسندگان
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