Abstract

In this paper, outage performance of Physical Layer Network Coding (PLNC) based half duplex Cognitive Radio Relay (CRR) system with two source and destination nodes is analyzed in overlay and underlay spectrum sharing schemes. Using Decode and Forward (DF) relay, two source nodes send data to both the destination nodes in two time slots when there is large fading and path loss between one of the source and destination nodes. The DF relay decodes the data symbols from the two source nodes and transmits the PLNC encoded symbol to both the destination nodes in the second time slot. Analytical expressions are derived for end-to-end outage probability for the proposed PLNC based CRR system and non-PLNC based system. Practical simulations are carried out to validate the analytical expressions.

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