Abstract—The faithful detection of presence of a primary user (PU) is the most essential requirement of a cognitive radio network. Otherwise the PU will experience jamming from a secondary user (SU) which will eventually lead to reduction in throughput of the PU. Similarly, the false detection of a PU will abstain a SU from its transmission opportunity hence reduce the throughput of the SU. Under this situation we propose a cognitive receiver equipped with multiple antenna and maximal ratio combining scheme (MRC) to detect the presence of a PU. The rest of the communication links like PU to PU or SU to PU uses single antenna. In this paper the concept of test statistics of fusion center from a previous literature is applied in the derivation of the probability of false alarm, probability of detection, channel capacity and symbol error rate of the network. The performance of a cognitive radio network under MRC scheme at receiving mode of SU is found better than the case of a single antenna.
Index Terms—MRC diversity, probability of detection, probability of false alarm, primary user, secondary user.
Risala T. Khan, Institute of Information Technology, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh (e-mail:ree162000@yahoo.com).Tanzilah Noor Shabnam is with the Department of Electronics and Telecommunication Engineering, South East University, Banani, Dhaka1213, Bangladesh (e-mail: tanzilah_nsu031@yahoo.com).
Md. Imdadul Islam is with the Department of Computer Science and Engineering, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh,(e-mail: imdad22000@yahoo.com).
M. R. Amin, Department of Electronics and Communications Engineering, East West University, Johurul Islam City, Aftabnagar, Dhaka1219, Bangladesh (e-mail: ramin@ewubd.edu).
Cite: Risala T. Khan, Tanzilah Noor Shabnam, Md. Imdadul Islam, and M. R. Amin, "Enhancement of Performance of Cognitive Radio Network with Incorporation of MRC Scheme at Secondary Receiver," International Journal of Engineering and Technology vol. 4, no. 4, pp. 495-499, 2012.
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