Spectrum allocation and power control in OFDM-based cognitive radios with target SINR constraints

Author

Popescu, Dimitrie C. ; Joshi, Deepak R. ; Dobre, Octavia A.

Author_Institution

Dept. of Electr. & Comput. Eng., Old Dominion Univ., Norfolk, VA, USA

fYear

2010

fDate

7-10 Nov. 2010

Firstpage

1891

Lastpage

1895

Abstract

In this paper we consider OFDM-based cognitive radios (CR) with linear precoders at the transmitter and minimum mean square error (MMSE) filters at the receiver, and formulate joint spectral allocation and power control subject to specified target signal-to-interference+noise ratio (SINR) as a constrained optimization problem. We discuss necessary and sufficient conditions for the optimal solution of this problem and present an algorithm that incrementally adapts the OFDM transmitter to reach the optimal transmit precoder and power values where the specified target SINR is achieved with minimum power.

Keywords

OFDM modulation; cognitive radio; least mean squares methods; power control; radio transmitters; telecommunication control; OFDM transmitter; OFDM-based cognitive radios; constrained optimization problem; joint spectral allocation; minimum mean square error filters; power control; spectrum allocation; target SINR constraints; Bit error rate; Cognitive radio; Interference; Joints; OFDM; Receivers; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers (ASILOMAR), 2010 Conference Record of the Forty Fourth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

978-1-4244-9722-5

Type

conf

DOI

10.1109/ACSSC.2010.5757867

Filename

5757867