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Optimal Power Allocation and Ergodic Capacity in Cognitive Radio Network
KTH, School of Electrical Engineering (EES).
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Cognitive radio network allows the secondary users (SUs) in a secondary communication network (SCN) coexist with priority users in a priority communication network (PCN). The interference caused by SCN to PCN is required to be rational and not affected the quality of server within the PCN to each priority users (PUs). In this paper, we study the optimal power allocation method to achieve the maximum ergodic capacity of both PU fading channel and SU fading channel under different power constraints. The interference power constraints at PU and the transmit power constraints at SU are considered, and the power constraints is distinguished as the peak power constraint and average power constraint. Different combinations of power constraints are analyzed under the particular system and channel fading model. This paper shows that in different scenarios the optimal power of SCN do exist to reach the maximum ergodic capacity of the entire system including SCN and PCN.

Abstract [sv]

Kognitiv radio nätverk till åter sekundära användare (SUs) i ett sekundärt kommunikationsnät (SCN) att samexistera med prioriterade användare i ett prioriterat kommunikationsnätverk (PCN). Den störning som orsakas av SCN till PCN krävs för att vara rationell och inte påverka kvaliteten på servern inom PCN till varje prioriterad användare (PUs). I denna uppsats studerar vi optimal effektfördelningsmetod för att uppnå maximal ergodisk kapacitet av både PU fading kanal och SU fading kanal under olik kraftbegränsningar. De störningskraftbegränsningar i PU och sändningskraftbegränsningar vid SU beaktas, och kraftbegränsningar är identifierat som toppeffektbegränsning och medeleffektbegränsning. Olik kombinationer av kraftbegränsningar analyseras i det särskilda systemet och kanal fading modellen. Detta dokument visar att olikscenarion existerar där den optimala kraften i SCN når maximal ergodisk kapacitet av hela systemet inklusive SCN och PCN.

Place, publisher, year, edition, pages
2016. , 30 p.
Series
TRITA-EE, ISSN 1653-5146 ; 2016:063
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-186045OAI: oai:DiVA.org:kth-186045DiVA: diva2:925045
Educational program
Master of Science - Wireless Systems
Presentation
2016-02-22, SIP Conference, Osquldas väg 10 (Floor 3), Stockholm, 10:00 (English)
Examiners
Available from: 2016-05-31 Created: 2016-04-29 Last updated: 2016-05-31Bibliographically approved

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CiteExportLink to record
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