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This paper shows the secrecy performance of a network in which secure two-way communication is possible via two half duplex decode and forward (DF) relays with an eavesdropper (EAV) trying to decode the message. In the absence of direct link from source one (S1) to source two (S2), two-way communication is established in two time phases with the help of two half duplex DF relays, first one is in broadcast...
Performance of a cooperative spectrum sensing with the help of a multi antenna based cognitive relay (CR) is analyzed in this paper. A cognitive coordinator (CC) equipped with an energy detector makes a final decision regarding primary user (PU) with the help of a cognitive relay. The cognitive relay employs maximal ratio combining (MRC) on the signals received from PU via multiple receiving antenna...
In wireless sensor networks (WSN) nodes are powered by limited lifetime batteries. Excessive high transmit power exhaust battery faster and increases inter-node interference significantly. On the other hand, low transmit power may cause network disconnectivity. Thus choice of transmit power is an important issue. Optimal transmit power is the minimum power required to sustain the network connectivity...
In this paper a novel network architecture employing space diversity for Wireless Sensor Networks (WSN) is proposed. A simulation study has been carried out to evaluate performance of such WSN employing space diversity in terms of optimal transmit power. Optimal transmit power is the minimum power required to sustain the network connectivity while maintaining a predefined maximum tolerable Bit Error...
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