Cognitive Code-Division Channelization

Author

Gao, Kanke ; Batalama, Stella N. ; Pados, Dimitris A. ; Matyjas, John D.

Author_Institution

Dept. of Electr. Eng., State Univ. of New York at Buffalo, Buffalo, NY, USA

Volume

10

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

1090

Lastpage

1097

Abstract

We consider the problem of simultaneous power and code-channel allocation for a secondary transmitter/receiver pair coexisting with a primary code-division multiple-access (CDMA) system. Our objective is to find the optimum transmitting power and code sequence of the secondary channel that maximize the signal-to-interference-plus-noise ratio (SINR) at the output of the maximum SINR linear receiver, while at the same time the SINR of all primary channels at the output of their max-SINR receiver is maintained above a certain threshold. This is a non-convex NP-hard optimization problem. We propose a novel feasible suboptimum solution using semidefinite programming. Simulation studies illustrate the theoretical developments.

Keywords

channel allocation; code division multiple access; cognitive radio; optimisation; CDMA; code channel allocation; code division multiple access system; code sequence; cognitive code division channelization; nonconvex NP hard optimization; signal to interference plus noise ratio; Interference; Multiaccess communication; Optimization; Programming; Receivers; Resource management; Signal to noise ratio; Code-channel allocation; code-division multiple-access; cognitive radio; power allocation; semidefinite programming; signal-to-interference-plus-noise ratio;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.011811.091542

Filename

5699836