Capacity of hybrid cognitive radio networks with distributed VAAs

Name: Capacity of hybrid cognitive radio networks with distributed VAAs
Author: Hong, X., Wang, C.-X., Uysal, Murat, Ge, X., Ouyang, S.

İsim	Capacity of hybrid cognitive radio networks with distributed VAAs
Yazar	Hong, X., Wang, C.-X., Uysal, Murat, Ge, X., Ouyang, S.
Basım Tarihi:	2010-09
Basım Yeri	- IEEE
Konu	Capacity analysis, Cognitive radio (CR) network, Multiple-input multiple-output (MIMO), Virtual antenna array VAA
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0018-9545
Kayıt Numarası	0e92b812-90ac-4da4-8d56-53663e03e932
Lokasyon	Electrical & Electronics Engineering
Tarih	2010-09
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	A cooperative hybrid cognitive radio (CR) network is proposed to simultaneously operate on a dedicated licensed band and a secondary band. The licensed band is used for communications between a base station (BS) and mobile CR users, whereas the secondary band is used to facilitate the licensed band communication by coordinating multiple CR users to form distributed virtual antenna arrays (VAAs). The capacity of the proposed CR network is studied at both the link and system levels. At the link level (single VAA case), we present an amplify-and-forward-based cooperative signaling scheme that employs power control to prevent harmful noise propagation. The resulting virtual multiple-input-multiple-output (MIMO) link capacity is derived and compared with the real MIMO system. At the system level (multiple VAAs case), the system capacity is derived as a function of multiple parameters, including the primary user density, CR user density, primary exclusion region radius, and VAA radius. Under an average interference power constraint, the maximum system capacity is further calculated by solving an optimization problem with adjustable system parameters. Numerical studies reveal that the proposed cooperative hybrid CR network has a fundamental advantage over a pure CR network by being insensitive to the characteristics of the coexisting primary network. This merit, however, relies on a high CR user density and a wide bandwidth of the secondary band.
DOI	10.1109/TVT.2010.2053056
Cilt	59

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Capacity of hybrid cognitive radio networks with distributed VAAs

Yazar Hong, X., Wang, C.-X., Uysal, Murat, Ge, X., Ouyang, S.

Basım Tarihi 2010-09

Basım Yeri - IEEE

Konu Capacity analysis, Cognitive radio (CR) network, Multiple-input multiple-output (MIMO), Virtual antenna array VAA

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0018-9545

Kayıt Numarası 0e92b812-90ac-4da4-8d56-53663e03e932

Lokasyon Electrical & Electronics Engineering

Tarih 2010-09

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin A cooperative hybrid cognitive radio (CR) network is proposed to simultaneously operate on a dedicated licensed band and a secondary band. The licensed band is used for communications between a base station (BS) and mobile CR users, whereas the secondary band is used to facilitate the licensed band communication by coordinating multiple CR users to form distributed virtual antenna arrays (VAAs). The capacity of the proposed CR network is studied at both the link and system levels. At the link level (single VAA case), we present an amplify-and-forward-based cooperative signaling scheme that employs power control to prevent harmful noise propagation. The resulting virtual multiple-input-multiple-output (MIMO) link capacity is derived and compared with the real MIMO system. At the system level (multiple VAAs case), the system capacity is derived as a function of multiple parameters, including the primary user density, CR user density, primary exclusion region radius, and VAA radius. Under an average interference power constraint, the maximum system capacity is further calculated by solving an optimization problem with adjustable system parameters. Numerical studies reveal that the proposed cooperative hybrid CR network has a fundamental advantage over a pure CR network by being insensitive to the characteristics of the coexisting primary network. This merit, however, relies on a high CR user density and a wide bandwidth of the secondary band.

DOI 10.1109/TVT.2010.2053056

Cilt 59