Friday 27 November 2015

IMPROVING PHYSICAL LAYER SECURITY FOR CRN USING SINR BASED COOPERATIVE BEAMFORMING

 CRN:
Cognitive Radio (CR) is an adaptive, intelligent radio and network technology that can automatically detect available channels in a wireless spectrum and change  transmission parameters enabling more communications to run concurrently and also improve radio operating behavior. Cognitive radio uses a number of technologies including Adaptive Radio (where the communications system monitors and modifies its own performance) and Software Defined Radio (SDR) where traditional hardware components including mixers, modulators and amplifies  have been replaced with intelligent software.  wireless spectrum



                                                            Fig: cognitive radio Network



                            New CRN where both PU and SU transmit confidential information to intended receivers .Aiming to provide intended users with different SINR, we design joint information beamforming and AN beamforming at the secondary transmitter. Remarkably, it is proved that using semi-definite relaxation (SDR)  the initial non-convex optimization can be equivalently converted into a convex semidefinite programming (SDP), which can be efficiently solved




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IMPROVING PHYSICAL LAYER SECURITY FOR CRN USING SINR BASED COOPERATIVE BEAMFORMING
 
 

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