BER Performance Analysis of Energy Harvesting Underlay Cooperative Cognitive Radio Network With Randomly Located Primary Users and Secondary Relays

In this work, we investigate the error probability of an energy harvesting co-operative cognitive radio network (CRN) in the presence of Poisson field of primary users (PU). We consider the scenario where, after harvesting energy from primary transmitters (PTs), a secondary transmitter (ST) would transmit its symbol towards secondary destination (SD) through a suitable secondary relay from a group of randomly scattered idle nodes within a circular region. Several relay selection criteria have been considered for relay node selection. Performance of a secondary transceiver has been analysed in terms of probability of error. Relationships among the bit error ratio (BER) performance of an ST and several other network entities such as density of PUs, transmit power of PTs and required transmit power of ST have also been investigated through detailed analysis. Numerical results are provided to assess the precision of derived analytical expressions.