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Accession Number ADA562486
Title Cognitive Code-Division Channelization.
Publication Date Apr 2011
Media Count 9p
Personal Author D. A. Pados J. D. Matyjas K. Gao S. N. Batalama
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 Code division multiple access
Code- channel allocation
Cognitive radio
Computer programming
Power allocation
Semidefinite programming
Signal to noise ratio
Signal-to-interference-plus-noise ratio
Threshold effects
Transmitter receivers

Source Agency Non Paid ADAS
NTIS Subject Category 46H - Radiofrequency Waves
45C - Common Carrier & Satellite
Corporate Author State Univ. of New York at Buffalo. Dept. of Electrical and Computer Engineering.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1225
Contract Number FA8750-08-1-0063

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